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    <title>MongoDB Jira</title>
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    <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>
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<item>
            <title>[SERVER-16860] Secondaries of same spec cannot keep up with high primary write load</title>
                <link>https://jira.mongodb.org/browse/SERVER-16860</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If I put a high continuous write load onto a a replica set I fall behind on the oplog until I fall off the end.&lt;/p&gt;

&lt;p&gt; All three nodes are the same (High) spec - using write concern defaults and a multi threaded insert only workload ( OPLOG, Journal and Collection on same Drive). They are all interconnected by the same network, as is the client.&lt;/p&gt;

&lt;p&gt;I know I could use a higher write concern but this is a simple and likely test scenario and I would expect the replication mechanism to be as fast as any external loader.&lt;/p&gt;

</description>
                <environment></environment>
        <key id="178864">SERVER-16860</key>
            <summary>Secondaries of same spec cannot keep up with high primary write load</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="4">Incomplete</resolution>
                                        <assignee username="john.page@mongodb.com">John Page</assignee>
                                    <reporter username="john.page@mongodb.com">John Page</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jan 2015 09:18:51 +0000</created>
                <updated>Fri, 3 Dec 2021 19:34:36 +0000</updated>
                            <resolved>Thu, 19 Mar 2015 04:43:15 +0000</resolved>
                                    <version>2.6.7</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="805227" author="john.page" created="Thu, 15 Jan 2015 13:33:24 +0000"  >&lt;p&gt;Sorry 2.6.7&lt;/p&gt;
</comment>
                            <comment id="805226" author="milkie" created="Thu, 15 Jan 2015 13:31:32 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=john.page&quot; class=&quot;user-hover&quot; rel=&quot;john.page&quot;&gt;john.page&lt;/a&gt;&lt;br/&gt;
In order to determine if this is a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16517&quot; title=&quot;Secondary on 2.8.0rc2 cannot keep up (insert-heavy, mmapv1) (mms-prod-queues)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16517&quot;&gt;&lt;del&gt;SERVER-16517&lt;/del&gt;&lt;/a&gt;, we need to know what version of mongod you are running for this test.&lt;/p&gt;</comment>
                            <comment id="805220" author="john.page" created="Thu, 15 Jan 2015 13:21:53 +0000"  >&lt;p&gt;3 AWS EBS Instances - type C4.2XL&lt;br/&gt;
   2 x 1TB SSD Disk with 4000 PIOPS as RAID 0.&lt;/p&gt;

&lt;p&gt;Custom Java loader pushing in records with 10 fields, _id index only, 32 threads with batches of 512, average size or record 2K&lt;br/&gt;
Insert rate on Primary - 11,000-&amp;gt;13,000 per second (measured with mongostat at 5 minute intervals).&lt;/p&gt;

&lt;p&gt;Insert rate on Secondaries (x2) 8,000-9,000 per second.&lt;/p&gt;

&lt;p&gt;Once 800GB loaded - oplog too old and secondaries failed.&lt;/p&gt;

&lt;p&gt;Don&apos;t have any other logs as resynced secondaries manually.&lt;/p&gt;
</comment>
                            <comment id="805210" author="scotthernandez" created="Thu, 15 Jan 2015 13:04:08 +0000"  >&lt;p&gt;Please provide your reproduction, logs, stats, version information, configuration and any other information about your tests including the detailed results.&lt;/p&gt;</comment>
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