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<channel>
    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
    </build-info>


<item>
            <title>[SERVER-16619] Very long pauses using 2.8.0-rc3 when running YCSB workload B.</title>
                <link>https://jira.mongodb.org/browse/SERVER-16619</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;While running benchmarking using YCSB to drive 2.8.0-rc2 I am seeing very long pauses when using the wiredTiger storage engine. &lt;/p&gt;

&lt;p&gt;Below is an example for one pause while using 50 connections to submit requests to MongoDB.  You can see that there are 49 active readers and 1 active writer but no actual activity for more than 30 seconds.  &lt;/p&gt;
&lt;p/&gt;
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&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;insert query update delete getmore command  vsize    res qr|qw ar|aw netIn netOut conn     time&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0    *0     *0     *0       0     3|0 832.0m 558.0m   0|0  49|1  196b    14k   52 17:55:13&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0    *0     *0     *0       0     1|0 832.0m 558.0m   0|0  49|1   79b    13k   52 17:55:14&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;insert query update delete getmore command  vsize    res qr|qw ar|aw netIn netOut conn     time&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;insert query update delete getmore command  vsize    res qr|qw ar|aw netIn netOut conn     time&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0    *0     *0     *0       0     1|0 832.0m 558.0m   0|0  49|1   79b    13k   52 17:55:26&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0    *0     *0     *0       0     2|0 832.0m 558.0m   0|0  49|1  133b    14k   52 17:55:27&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0    *0     *0     *0       0     1|0 832.0m 558.0m   0|0  49|1   79b    13k   52 17:55:28&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0    *0     *0     *0       0     3|0 832.0m 558.0m   0|0  49|1  196b    14k   52 17:55:29&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    *0  7679    460     *0       0     1|0 832.0m 558.0m   0|0   1|0  749k     9m   52 17:55:30&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;The log for the same time contains:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:00.244-0500 I QUERY    [conn4748] query ycsb.usertable query: { _id: &quot;user7451509487272215972&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 1415ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:01.257-0500 I QUERY    [conn4736] query ycsb.usertable query: { _id: &quot;user3227454442640408640&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 2433ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.214-0500 I QUERY    [conn4744] query ycsb.usertable query: { _id: &quot;user6166968228214299628&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30386ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.214-0500 I QUERY    [conn4746] query ycsb.usertable query: { _id: &quot;user8191443625511902077&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30386ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.214-0500 I QUERY    [conn4749] query ycsb.usertable query: { _id: &quot;user6487733026444452781&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30386ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.214-0500 I QUERY    [conn4724] query ycsb.usertable query: { _id: &quot;user2226736668874946663&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30381ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.218-0500 I QUERY    [conn4721] query ycsb.usertable query: { _id: &quot;user5894492235159234502&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30419ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.214-0500 I QUERY    [conn4709] query ycsb.usertable query: { _id: &quot;user1373595748404263629&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30414ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4748] query ycsb.usertable query: { _id: &quot;user4950147756295652640&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 28959ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4720] query ycsb.usertable query: { _id: &quot;user2055593758111674847&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30415ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4730] query ycsb.usertable query: { _id: &quot;user56014800527503739&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1186 30378ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4718] query ycsb.usertable query: { _id: &quot;user5897614011721353210&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30415ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4728] query ycsb.usertable query: { _id: &quot;user5354495927861598392&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30382ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4713] query ycsb.usertable query: { _id: &quot;user1496313878094450776&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30415ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4717] query ycsb.usertable query: { _id: &quot;user8161110198689116684&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30381ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4737] query ycsb.usertable query: { _id: &quot;user8240817027074190729&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30388ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4729] query ycsb.usertable query: { _id: &quot;user5397446005716489464&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30382ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4705] query ycsb.usertable query: { _id: &quot;user4943221732227823167&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30414ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4731] query ycsb.usertable query: { _id: &quot;user604599733608267843&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1187 30351ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4712] query ycsb.usertable query: { _id: &quot;user2701672944642353252&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30412ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I QUERY    [conn4745] query ycsb.usertable query: { _id: &quot;user4628288935854360350&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30388ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.215-0500 I WRITE    [conn4700] update ycsb.usertable query: { _id: &quot;user6896671575243275940&quot; } update: { $set: { field5: BinData(0, 372A383C3C3F342A2137353620233E38333B3C2531323D212727333F3C24382521372E3C353B2D202F38383E302A2E27233E313829343D302A3E222B2A222522242C2E2A3634...) } } nscanned:1 nscannedObjects:1 nMatched:1 nModified:1 fastmod:1 keyUpdates:0  30406ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.222-0500 I QUERY    [conn4700] command ycsb.$cmd command: update { update: &quot;usertable&quot;, ordered: true, updates: [ { q: { _id: &quot;user6896671575243275940&quot; }, u: { $set: { field5: BinData(0, 372A383C3C3F342A2137353620233E38333B3C2531323D212727333F3C24382521372E3C353B2D202F38383E302A2E27233E313829343D302A3E222B2A222522242C2E2A3634...) } } } ] } keyUpdates:0  reslen:55 30414ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4742] query ycsb.usertable query: { _id: &quot;user6854659256357746326&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30355ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4701] query ycsb.usertable query: { _id: &quot;user6291227256020253263&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30417ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4706] query ycsb.usertable query: { _id: &quot;user7734622211336177249&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30415ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4719] query ycsb.usertable query: { _id: &quot;user7235484549089463787&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30382ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4715] query ycsb.usertable query: { _id: &quot;user3148637402766075822&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30416ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4740] query ycsb.usertable query: { _id: &quot;user8394176476071135764&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30381ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4733] query ycsb.usertable query: { _id: &quot;user2385260537134353526&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30355ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4726] query ycsb.usertable query: { _id: &quot;user2579538282805689038&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30382ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4716] query ycsb.usertable query: { _id: &quot;user8901683629238130264&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30417ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4703] query ycsb.usertable query: { _id: &quot;user8708356895527758009&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30416ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4714] query ycsb.usertable query: { _id: &quot;user2756122143976828381&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30417ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4707] query ycsb.usertable query: { _id: &quot;user3085002793272340418&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30416ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4735] query ycsb.usertable query: { _id: &quot;user4685787614305946398&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30355ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4723] query ycsb.usertable query: { _id: &quot;user1594640659903397749&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30383ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4743] query ycsb.usertable query: { _id: &quot;user6166968228214299628&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30355ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.216-0500 I QUERY    [conn4711] query ycsb.usertable query: { _id: &quot;user3035668607045802873&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30416ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4736] query ycsb.usertable query: { _id: &quot;user8709897793643524497&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 27942ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4722] query ycsb.usertable query: { _id: &quot;user388721632843354825&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1187 30418ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4708] query ycsb.usertable query: { _id: &quot;user8102804954222647272&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30384ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4734] query ycsb.usertable query: { _id: &quot;user7175316432505811419&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30356ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4739] query ycsb.usertable query: { _id: &quot;user3155229635536791041&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30382ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4732] query ycsb.usertable query: { _id: &quot;user4844758358469980612&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30356ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4704] query ycsb.usertable query: { _id: &quot;user8886618246763559422&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30413ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4738] query ycsb.usertable query: { _id: &quot;user5699680427788900301&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30390ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4725] query ycsb.usertable query: { _id: &quot;user6135322463962533215&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30383ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4710] query ycsb.usertable query: { _id: &quot;user5139005051377844896&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30417ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4727] query ycsb.usertable query: { _id: &quot;user1345798238818314737&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30384ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4747] query ycsb.usertable query: { _id: &quot;user6131835534764733457&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30389ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.217-0500 I QUERY    [conn4741] query ycsb.usertable query: { _id: &quot;user8044863363164947348&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30357ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T17:55:29.706-0500 I QUERY    [conn4702] query ycsb.usertable query: { _id: &quot;user4895333404325496461&quot; } planSummary: IDHACK ntoskip:0 nscanned:1 nscannedObjects:1 idhack:1 keyUpdates:0  nreturned:1 reslen:1188 30910ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;The start of the log file is:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.988-0500 I CONTROL  [initandlisten] MongoDB starting : pid=998 port=27017 dbpath=/home/rjmoore/ycsb/data-2.8.0-rc3 64-bit host=eeyore.allanbank.lan&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.988-0500 I CONTROL  [initandlisten] db version v2.8.0-rc3&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.988-0500 I CONTROL  [initandlisten] git version: 2d679247f17dab05a492c8b6d2c250dab18e54f2&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.988-0500 I CONTROL  [initandlisten] build info: Linux build4.nj1.10gen.cc 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.988-0500 I CONTROL  [initandlisten] allocator: tcmalloc&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.988-0500 I CONTROL  [initandlisten] options: { net: { port: 27017 }, processManagement: { fork: true }, storage: { dbPath: &quot;/home/rjmoore/ycsb/data-2.8.0-rc3&quot;, engine: &quot;wiredTiger&quot;, journal: { enabled: false } }, systemLog: { destination: &quot;file&quot;, path: &quot;/home/rjmoore/ycsb/mongodb.2.8.0-rc3.log&quot;, quiet: true } }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:39.989-0500 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=3G,session_max=20000,extensions=[local=(entry=index_collator_extension)],statistics=(all),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2014-12-20T15:45:40.393-0500 I NETWORK  [initandlisten] waiting for connections on port 27017&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;We saw similar, shorter, pauses with rc2 but thought the issue was &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16296&quot; title=&quot;Producer-consumer use case shows declining performance over time under WIredTiger&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16296&quot;&gt;&lt;del&gt;SERVER-16296&lt;/del&gt;&lt;/a&gt;. &lt;/p&gt;

&lt;p&gt;I will attach the full log file and script (run-tests.sh) being used to run YCSB with different workloads and combination of threads and connections. &lt;/p&gt;

&lt;p&gt;I have also include the script to start the mongod process (run.sh).&lt;/p&gt;</description>
                <environment></environment>
        <key id="175637">SERVER-16619</key>
            <summary>Very long pauses using 2.8.0-rc3 when running YCSB workload B.</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="robert.j.moore@allanbank.com">Robert Moore</reporter>
                        <labels>
                    </labels>
                <created>Sat, 20 Dec 2014 23:13:27 +0000</created>
                <updated>Sat, 24 Jan 2015 17:18:15 +0000</updated>
                            <resolved>Wed, 31 Dec 2014 05:27:30 +0000</resolved>
                                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>12</watches>
                                                                                                                <comments>
                            <comment id="795626" author="dan@10gen.com" created="Wed, 31 Dec 2014 05:27:30 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=robert.j.moore%40allanbank.com&quot; class=&quot;user-hover&quot; rel=&quot;robert.j.moore@allanbank.com&quot;&gt;robert.j.moore@allanbank.com&lt;/a&gt;, there are still some things we&apos;re working on for RC5, but closing this out as a duplicate.&lt;/p&gt;

&lt;p&gt;Thanks&lt;/p&gt;</comment>
                            <comment id="791658" author="robert.j.moore@allanbank.com" created="Sun, 21 Dec 2014 14:09:20 +0000"  >&lt;p&gt;Agree - looks very similar.&lt;/p&gt;</comment>
                            <comment id="791627" author="dan@10gen.com" created="Sun, 21 Dec 2014 08:04:22 +0000"  >&lt;p&gt;likely duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16269&quot; title=&quot;WiredTiger blocks queries and updates for many seconds.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16269&quot;&gt;&lt;del&gt;SERVER-16269&lt;/del&gt;&lt;/a&gt;.  will leave open until we can confirm.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="170663">SERVER-16269</issuekey>
        </issuelink>
                            </outwardlinks>
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                            <attachment id="60184" name="mongodb.2.8.0-rc3.log" size="11137430" author="robert.j.moore@allanbank.com" created="Sat, 20 Dec 2014 23:13:27 +0000"/>
                            <attachment id="60186" name="run-tests.sh" size="3638" author="robert.j.moore@allanbank.com" created="Sat, 20 Dec 2014 23:13:27 +0000"/>
                            <attachment id="60185" name="run.sh" size="416" author="robert.j.moore@allanbank.com" created="Sat, 20 Dec 2014 23:13:27 +0000"/>
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