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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-4174] Replicaset resync skips building of _id index in certain circumstances</title>
                <link>https://jira.mongodb.org/browse/SERVER-4174</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We are in the process of resyncing to address fragmentation and to upgrade all indexes to the newer v1 format. This process worked fine for 3 of our 4 shards. The 4th shard is the primary for the namespace and because we have not yet fully tested MR output to a sharded collection, it also stores the output of all MR tasks. None of the indexes on this shard have been upgraded to v1. In 4 resync attempts (remove all data on secondary), we have noticed that the &lt;/p&gt;
{ _id: 1 }
&lt;p&gt; index on some collections is not built during the resync process and hypothesize that there is some corruption or incompatibility in the index that appears to leave the index functional for queries but somehow prevents it from being rebuilt during resync attempts. We believe that this impacts replay of the oplog, causing it to seemingly hang--optimeDate does not advance (perhaps it is working but extremely slow). Shutting down the node shows the in-progress operation being interrupted:&lt;/p&gt;

&lt;p&gt;Fri Oct 28 16:26:33 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; replSet syncTail: 11600 interrupted at shutdown, syncing: { ts: Timestamp 1319826732000|30, h: 1028901388370155163, op: &quot;u&quot;, ns: &quot;mydb.mycoll&quot;, o2: { _id: &lt;/p&gt;
{ ... } }, o: { _id: { ... }
&lt;p&gt;, value: &lt;/p&gt;
{ ...data... }
&lt;p&gt; } }&lt;/p&gt;

&lt;p&gt;The timestamp matches the optimeDate. We have seen this affect both inserts and updates. It appears to only affect collections which are the target for MR output. Additionally, it may only affect collections wherein MR results are re-reduced/re-finalized, but we are less confident about this assessment.&lt;/p&gt;</description>
                <environment>ubuntu 10.04 x86_64; 4 x replicaset shards, each replicaset with two participating members and one arbiter</environment>
        <key id="24232">SERVER-4174</key>
            <summary>Replicaset resync skips building of _id index in certain circumstances</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="5">Cannot Reproduce</resolution>
                                        <assignee username="kristina">Kristina Chodorow</assignee>
                                    <reporter username="wayne530">Y. Wayne Huang</reporter>
                        <labels>
                            <label>indexing</label>
                            <label>replicaset</label>
                            <label>replication</label>
                    </labels>
                <created>Sat, 29 Oct 2011 00:51:55 +0000</created>
                <updated>Wed, 15 Aug 2012 14:02:56 +0000</updated>
                            <resolved>Fri, 9 Mar 2012 19:49:07 +0000</resolved>
                                    <version>2.0.1</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="97317" author="kristina" created="Fri, 9 Mar 2012 19:48:55 +0000"  >&lt;p&gt;Suspected issue, as _id index is created after clone.&lt;/p&gt;</comment>
                            <comment id="97315" author="kristina" created="Fri, 9 Mar 2012 19:48:12 +0000"  >&lt;p&gt;I&apos;m sorry it took me so long to get back to you.  We&apos;re a bit overloaded and I lost track of things.  I&apos;ll link this to the bug I think caused the problem and mark as Cannot Reproduce.&lt;/p&gt;</comment>
                            <comment id="97296" author="wayne530" created="Fri, 9 Mar 2012 19:23:06 +0000"  >&lt;p&gt;I&apos;m sorry, but I no longer remember enough details about this issue to provide any further information. I suggest that if you mark a bug as &apos;debugging with submitter&apos; that it doesn&apos;t occur months after the issue is reported.&lt;/p&gt;</comment>
                            <comment id="97282" author="kristina" created="Fri, 9 Mar 2012 18:46:55 +0000"  >&lt;p&gt;This might be the same as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5040&quot; title=&quot;Cloner can fail to create unique indexes on initial sync&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5040&quot;&gt;&lt;del&gt;SERVER-5040&lt;/del&gt;&lt;/a&gt;.  It would be very helpful to have the logs from startup to eventual _id index creation.&lt;/p&gt;</comment>
                            <comment id="81047" author="kristina" created="Thu, 19 Jan 2012 19:33:32 +0000"  >&lt;p&gt;Sorry for the delay!&lt;/p&gt;

&lt;p&gt;Can you send the output of running:&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;&amp;gt; db.mycoll.getIndexes()&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;&amp;gt; db.mycoll2.getIndexes()&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;&amp;gt; db.system.namespaces.find()&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;Also, if you can try initial syncing with &lt;tt&gt;-vvvvv&lt;/tt&gt; and pasting the logs, it would be very helpful.&lt;/p&gt;</comment>
                            <comment id="65626" author="eliot" created="Wed, 9 Nov 2011 07:44:27 +0000"  >&lt;p&gt;Kristina has been out, but should continue working on this tomorrow.&lt;/p&gt;</comment>
                            <comment id="65453" author="wayne530" created="Tue, 8 Nov 2011 16:21:46 +0000"  >&lt;p&gt;any updates?&lt;/p&gt;</comment>
                            <comment id="64045" author="wayne530" created="Tue, 1 Nov 2011 21:11:22 +0000"  >&lt;p&gt;updates?&lt;/p&gt;</comment>
                            <comment id="63742" author="wayne530" created="Mon, 31 Oct 2011 17:27:49 +0000"  >&lt;p&gt;serverStatus:&lt;/p&gt;


&lt;p&gt;{&lt;br/&gt;
	&quot;host&quot; : &quot;mongo-s1-02:27017&quot;,&lt;br/&gt;
	&quot;version&quot; : &quot;2.0.1&quot;,&lt;br/&gt;
	&quot;process&quot; : &quot;mongod&quot;,&lt;br/&gt;
	&quot;uptime&quot; : 134268,&lt;br/&gt;
	&quot;uptimeEstimate&quot; : 133273,&lt;br/&gt;
	&quot;localTime&quot; : ISODate(&quot;2011-10-31T17:22:48.849Z&quot;),&lt;br/&gt;
	&quot;globalLock&quot; : {&lt;br/&gt;
		&quot;totalTime&quot; : 134267874816,&lt;br/&gt;
		&quot;lockTime&quot; : 10835941188,&lt;br/&gt;
		&quot;ratio&quot; : 0.08070390033989529,&lt;br/&gt;
		&quot;currentQueue&quot; : &lt;/p&gt;
{
			&quot;total&quot; : 0,
			&quot;readers&quot; : 0,
			&quot;writers&quot; : 0
		}
&lt;p&gt;,&lt;br/&gt;
		&quot;activeClients&quot; : &lt;/p&gt;
{
			&quot;total&quot; : 0,
			&quot;readers&quot; : 0,
			&quot;writers&quot; : 0
		}
&lt;p&gt;	},&lt;br/&gt;
	&quot;mem&quot; : &lt;/p&gt;
{
		&quot;bits&quot; : 64,
		&quot;resident&quot; : 4942,
		&quot;virtual&quot; : 140325,
		&quot;supported&quot; : true,
		&quot;mapped&quot; : 69872,
		&quot;mappedWithJournal&quot; : 139744
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;connections&quot; : &lt;/p&gt;
{
		&quot;current&quot; : 11,
		&quot;available&quot; : 15989
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;extra_info&quot; : &lt;/p&gt;
{
		&quot;note&quot; : &quot;fields vary by platform&quot;,
		&quot;heap_usage_bytes&quot; : 359936,
		&quot;page_faults&quot; : 3165756
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;indexCounters&quot; : {&lt;br/&gt;
		&quot;btree&quot; : &lt;/p&gt;
{
			&quot;accesses&quot; : 149272,
			&quot;hits&quot; : 148953,
			&quot;misses&quot; : 319,
			&quot;resets&quot; : 0,
			&quot;missRatio&quot; : 0.0021370384264965967
		}
&lt;p&gt;	},&lt;br/&gt;
	&quot;backgroundFlushing&quot; : &lt;/p&gt;
{
		&quot;flushes&quot; : 2237,
		&quot;total_ms&quot; : 1084727,
		&quot;average_ms&quot; : 484.9025480554314,
		&quot;last_ms&quot; : 43,
		&quot;last_finished&quot; : ISODate(&quot;2011-10-31T17:22:01.262Z&quot;)
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;cursors&quot; : &lt;/p&gt;
{
		&quot;totalOpen&quot; : 0,
		&quot;clientCursors_size&quot; : 0,
		&quot;timedOut&quot; : 0
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;network&quot; : &lt;/p&gt;
{
		&quot;bytesIn&quot; : 27763509,
		&quot;bytesOut&quot; : 94335276,
		&quot;numRequests&quot; : 296096
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;repl&quot; : &lt;/p&gt;
{
		&quot;setName&quot; : &quot;shard1&quot;,
		&quot;ismaster&quot; : false,
		&quot;secondary&quot; : true,
		&quot;hosts&quot; : [
			&quot;192.168.43.204:27017&quot;,
			&quot;192.168.42.230:27017&quot;
		],
		&quot;arbiters&quot; : [
			&quot;192.168.44.208:27101&quot;
		],
		&quot;primary&quot; : &quot;192.168.42.230:27017&quot;,
		&quot;me&quot; : &quot;192.168.43.204:27017&quot;
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;opcountersRepl&quot; : &lt;/p&gt;
{
		&quot;insert&quot; : 203926,
		&quot;query&quot; : 0,
		&quot;update&quot; : 542635,
		&quot;delete&quot; : 602680,
		&quot;getmore&quot; : 0,
		&quot;command&quot; : 2292
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;opcounters&quot; : &lt;/p&gt;
{
		&quot;insert&quot; : 0,
		&quot;query&quot; : 3,
		&quot;update&quot; : 0,
		&quot;delete&quot; : 0,
		&quot;getmore&quot; : 0,
		&quot;command&quot; : 296099
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;asserts&quot; : &lt;/p&gt;
{
		&quot;regular&quot; : 0,
		&quot;warning&quot; : 0,
		&quot;msg&quot; : 0,
		&quot;user&quot; : 71,
		&quot;rollovers&quot; : 0
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;writeBacksQueued&quot; : false,&lt;br/&gt;
	&quot;dur&quot; : {&lt;br/&gt;
		&quot;commits&quot; : 28,&lt;br/&gt;
		&quot;journaledMB&quot; : 0.073728,&lt;br/&gt;
		&quot;writeToDataFilesMB&quot; : 0.023417,&lt;br/&gt;
		&quot;compression&quot; : 0.9999864368159069,&lt;br/&gt;
		&quot;commitsInWriteLock&quot; : 0,&lt;br/&gt;
		&quot;earlyCommits&quot; : 0,&lt;br/&gt;
		&quot;timeMs&quot; : &lt;/p&gt;
{
			&quot;dt&quot; : 3037,
			&quot;prepLogBuffer&quot; : 0,
			&quot;writeToJournal&quot; : 173,
			&quot;writeToDataFiles&quot; : 0,
			&quot;remapPrivateView&quot; : 0
		}
&lt;p&gt;	},&lt;br/&gt;
	&quot;ok&quot; : 1&lt;br/&gt;
}&lt;/p&gt;</comment>
                            <comment id="63739" author="wayne530" created="Mon, 31 Oct 2011 17:22:09 +0000"  >&lt;p&gt;Okay, after a bit more debugging it looks like the missing &lt;/p&gt;
{ _id: 1 }
&lt;p&gt; indexes do eventually get built but it occurs a few hours after the sync is complete and the recovering node has already become a secondary. Isn&apos;t this problematic because replaying update operations from the oplog will result in a full collection scan without this index? Here is a portion of the log during a full resync (remove all secondary data + restart) showing one of the affected collections:&lt;/p&gt;

&lt;p&gt;Sat Oct 29 21:11:39 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 413286 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:11:39 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 413311&lt;br/&gt;
Sat Oct 29 21:12:39 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 878591&lt;br/&gt;
Sat Oct 29 21:12:44 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 879630 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:13:42 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 1428351&lt;br/&gt;
Sat Oct 29 21:13:47 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 1444653 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:14:43 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 2042367&lt;br/&gt;
Sat Oct 29 21:14:53 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 2107720 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:15:49 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 2504447&lt;br/&gt;
Sat Oct 29 21:15:55 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 2514501 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:16:49 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 2836863&lt;br/&gt;
Sat Oct 29 21:16:56 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 2861465 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:17:49 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 3152127&lt;br/&gt;
Sat Oct 29 21:17:57 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 3218462 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:18:51 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 3582591&lt;br/&gt;
Sat Oct 29 21:18:58 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 3655342 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:19:51 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 4004223&lt;br/&gt;
Sat Oct 29 21:19:59 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 4109113 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:20:51 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 4671487&lt;br/&gt;
Sat Oct 29 21:21:01 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 4717824 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:21:51 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 5184511&lt;br/&gt;
Sat Oct 29 21:22:02 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 5200678 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:22:51 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 5612415&lt;br/&gt;
Sat Oct 29 21:23:03 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 5686707 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 21:23:52 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; clone mydb_0.mycoll_0 6208511&lt;br/&gt;
Sat Oct 29 21:24:06 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; 6279289 objects cloned so far from collection mydb_0.mycoll_0&lt;br/&gt;
Sat Oct 29 22:37:09 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; build index mydb_0.mycoll_0 &lt;/p&gt;
{ _id.hid: 1.0 }
&lt;p&gt;...&lt;br/&gt;
Sat Oct 29 22:48:24 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; replSet SECONDARY&lt;br/&gt;
...&lt;br/&gt;
Sun Oct 30 02:01:41 &lt;span class=&quot;error&quot;&gt;&amp;#91;rsSync&amp;#93;&lt;/span&gt; build index mydb_0.mycoll_0 &lt;/p&gt;
{ _id: 1 }

&lt;p&gt;For what it&apos;s worth, our initial assessment about a corrupt index on the primary is probably incorrect. We tested the behavior after rebuilding indexes in the affected collections and the same behavior occurs (_id index is built a few hours later).&lt;/p&gt;</comment>
                            <comment id="63466" author="eliot" created="Sat, 29 Oct 2011 02:31:00 +0000"  >&lt;p&gt;CAn you attach all logs from the secondary that is failing?&lt;/p&gt;</comment>
                            <comment id="63460" author="scotthernandez" created="Sat, 29 Oct 2011 01:10:48 +0000"  >&lt;p&gt;Can you post db.serverStatus() on the secondaries please?&lt;/p&gt;</comment>
                            <comment id="63458" author="wayne530" created="Sat, 29 Oct 2011 01:07:03 +0000"  >&lt;p&gt;On the two affected collections, here is .stats() from the primary:&lt;/p&gt;


&lt;p&gt;PRIMARY&amp;gt; db.mycoll.stats()&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;mydb.mycoll&quot;,&lt;br/&gt;
	&quot;count&quot; : 6682237,&lt;br/&gt;
	&quot;size&quot; : 10865763964,&lt;br/&gt;
	&quot;avgObjSize&quot; : 1626.0668342053716,&lt;br/&gt;
	&quot;storageSize&quot; : 16758695904,&lt;br/&gt;
	&quot;numExtents&quot; : 38,&lt;br/&gt;
	&quot;nindexes&quot; : 2,&lt;br/&gt;
	&quot;lastExtentSize&quot; : 2146426864,&lt;br/&gt;
	&quot;paddingFactor&quot; : 1.4199999999281745,&lt;br/&gt;
	&quot;flags&quot; : 1,&lt;br/&gt;
	&quot;totalIndexSize&quot; : 1078650752,&lt;br/&gt;
	&quot;indexSizes&quot; : &lt;/p&gt;
{
		&quot;_id.hid_1&quot; : 389104576,
		&quot;_id_&quot; : 689546176
	}
&lt;p&gt;,&lt;br/&gt;
	&quot;ok&quot; : 1&lt;br/&gt;
}&lt;br/&gt;
PRIMARY&amp;gt; db.mycoll2.stats()&lt;br/&gt;
{&lt;br/&gt;
	&quot;ns&quot; : &quot;mydb.mycoll2&quot;,&lt;br/&gt;
	&quot;count&quot; : 2411182,&lt;br/&gt;
	&quot;size&quot; : 22009995704,&lt;br/&gt;
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