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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-2602] Logging &quot;query admin.$cmd ntoreturn:1 command:...&quot; shows extremely high ms response times</title>
                <link>https://jira.mongodb.org/browse/SERVER-2602</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Response times of e.g. 300028ms don&apos;t seem realistic&lt;/p&gt;

&lt;p&gt;From mongod slave during initial replica set sync:&lt;/p&gt;

&lt;p&gt;Mon Feb 21 21:04:47 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn17&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5d5bb8c2504987772ec41b&apos;) }
&lt;p&gt; reslen:60 300028ms&lt;br/&gt;
Mon Feb 21 21:04:49 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn21&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5cf8b4b47bc4ea73aa83a1&apos;) }
&lt;p&gt; reslen:60 300027ms&lt;br/&gt;
Mon Feb 21 21:05:20 &lt;span class=&quot;error&quot;&gt;&amp;#91;replica set sync&amp;#93;&lt;/span&gt; 1873579 objects cloned so far from collection sd.metrics&lt;br/&gt;
Mon Feb 21 21:05:29 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn31&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5ba5a96ed04dfbd093cd97&apos;) }
&lt;p&gt; reslen:60 300029ms&lt;br/&gt;
Mon Feb 21 21:06:21 &lt;span class=&quot;error&quot;&gt;&amp;#91;replica set sync&amp;#93;&lt;/span&gt; 2843732 objects cloned so far from collection sd.metrics&lt;br/&gt;
Mon Feb 21 21:06:21 &lt;span class=&quot;error&quot;&gt;&amp;#91;FileAllocator&amp;#93;&lt;/span&gt; allocating new datafile /mongodbdata/sd.4, filling with zeroes...&lt;br/&gt;
Mon Feb 21 21:06:22 &lt;span class=&quot;error&quot;&gt;&amp;#91;FileAllocator&amp;#93;&lt;/span&gt; done allocating datafile /mongodbdata/sd.4, size: 1024MB,  took 1.145 secs&lt;br/&gt;
Mon Feb 21 21:07:22 &lt;span class=&quot;error&quot;&gt;&amp;#91;replica set sync&amp;#93;&lt;/span&gt; 3793311 objects cloned so far from collection sd.metrics&lt;br/&gt;
Mon Feb 21 21:07:45 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn32&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5ba56021d7d00ef5bbe3b7&apos;) }
&lt;p&gt; reslen:60 300031ms&lt;br/&gt;
Mon Feb 21 21:08:02 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn33&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5a54108d4e400d241a4a83&apos;) }
&lt;p&gt; reslen:60 300032ms&lt;br/&gt;
Mon Feb 21 21:08:24 &lt;span class=&quot;error&quot;&gt;&amp;#91;replica set sync&amp;#93;&lt;/span&gt; 4694503 objects cloned so far from collection sd.metrics&lt;br/&gt;
Mon Feb 21 21:09:25 &lt;span class=&quot;error&quot;&gt;&amp;#91;replica set sync&amp;#93;&lt;/span&gt; 5568644 objects cloned so far from collection sd.metrics&lt;br/&gt;
Mon Feb 21 21:09:46 &lt;span class=&quot;error&quot;&gt;&amp;#91;FileAllocator&amp;#93;&lt;/span&gt; allocating new datafile /mongodbdata/sd.5, filling with zeroes...&lt;br/&gt;
Mon Feb 21 21:09:47 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn17&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5d5bb8c2504987772ec41b&apos;) }
&lt;p&gt; reslen:60 300033ms&lt;br/&gt;
Mon Feb 21 21:09:49 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn21&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5cf8b4b47bc4ea73aa83a1&apos;) }
&lt;p&gt; reslen:60 300034ms&lt;br/&gt;
Mon Feb 21 21:09:50 &lt;span class=&quot;error&quot;&gt;&amp;#91;FileAllocator&amp;#93;&lt;/span&gt; done allocating datafile /mongodbdata/sd.5, size: 2047MB,  took 4.153 secs&lt;br/&gt;
Mon Feb 21 21:10:27 &lt;span class=&quot;error&quot;&gt;&amp;#91;replica set sync&amp;#93;&lt;/span&gt; 6470217 objects cloned so far from collection sd.metrics&lt;br/&gt;
Mon Feb 21 21:10:29 &lt;span class=&quot;error&quot;&gt;&amp;#91;conn31&amp;#93;&lt;/span&gt; query admin.$cmd ntoreturn:1 command: &lt;/p&gt;
{ writebacklisten: ObjectId(&apos;4d5ba5a96ed04dfbd093cd97&apos;) }
&lt;p&gt; reslen:60 300033ms&lt;/p&gt;</description>
                <environment>Mon Feb 21 20:52:59 [initandlisten] db version v1.7.5, pdfile version 4.5&lt;br/&gt;
Mon Feb 21 20:52:59 [initandlisten] git version: 1978898d7a013657e5400133defdc996fb4c2c15&lt;br/&gt;
Mon Feb 21 20:52:59 [initandlisten] sys info: Linux domU-12-31-39-06-79-A1 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_41</environment>
        <key id="14836">SERVER-2602</key>
            <summary>Logging &quot;query admin.$cmd ntoreturn:1 command:...&quot; shows extremely high ms response times</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="9">Done</resolution>
                                        <assignee username="eliot">Eliot Horowitz</assignee>
                                    <reporter username="boxedice">David Mytton</reporter>
                        <labels>
                    </labels>
                <created>Mon, 21 Feb 2011 21:12:31 +0000</created>
                <updated>Tue, 12 Jul 2016 00:17:40 +0000</updated>
                            <resolved>Mon, 2 Apr 2012 23:40:52 +0000</resolved>
                                    <version>1.7.5</version>
                                    <fixVersion>2.1.1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="105893" author="auto" created="Mon, 2 Apr 2012 23:40:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;erh&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2602&quot; title=&quot;Logging &amp;quot;query admin.$cmd ntoreturn:1 command:...&amp;quot; shows extremely high ms response times&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2602&quot;&gt;&lt;del&gt;SERVER-2602&lt;/del&gt;&lt;/a&gt; supress writebacklist messages from log under normal verbosity&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6c2bc1e8d3babd21ab49ec805b17a9c2e4c70fed&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6c2bc1e8d3babd21ab49ec805b17a9c2e4c70fed&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="24386" author="eliot" created="Mon, 21 Feb 2011 21:15:10 +0000"  >&lt;p&gt;For writebacks that&apos;s normal and correct.&lt;br/&gt;
We&apos;ll change the logging.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="26947">SERVER-4527</issuekey>
        </issuelink>
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