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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>
    <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-36041] Increase the size of changelog and actionlog</title>
                <link>https://jira.mongodb.org/browse/SERVER-36041</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The (uncompressed) changelog and actionlog size is currently 10MB and 2MB respectively.&lt;/p&gt;

&lt;p&gt;On &lt;em&gt;busy&lt;/em&gt; clusters (many concurrent chunk migrations and splits), I have seen the changelog window shrink to ~2 hours.&lt;/p&gt;

&lt;p&gt;For diagnostic purposes it would be useful to increase the changelog and actionlog size to hold a longer time window.&lt;/p&gt;

&lt;p&gt;Suggested sizes:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;changelog: 200 MB (20x)&lt;/li&gt;
	&lt;li&gt;actionlog: 20 MB (10x, as it tends to be less subject to writes in a busy cluster)&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="569687">SERVER-36041</key>
            <summary>Increase the size of changelog and actionlog</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="13201">Fixed</resolution>
                                        <assignee username="sarah.zhou@mongodb.com">Sarah Zhou</assignee>
                                    <reporter username="josef.ahmad@mongodb.com">Josef Ahmad</reporter>
                        <labels>
                    </labels>
                <created>Tue, 10 Jul 2018 09:07:00 +0000</created>
                <updated>Sun, 29 Oct 2023 22:30:00 +0000</updated>
                            <resolved>Thu, 12 Jul 2018 14:27:18 +0000</resolved>
                                                    <fixVersion>3.6.7</fixVersion>
                    <fixVersion>4.0.1</fixVersion>
                    <fixVersion>4.1.1</fixVersion>
                                    <component>Diagnostics</component>
                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="1945544" author="ramon.fernandez" created="Thu, 12 Jul 2018 15:27:04 +0000"  >&lt;p&gt;I was not aware we did not document the current sizes, but I also found &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-5071&quot; title=&quot;Document config.actionlog collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5071&quot;&gt;&lt;del&gt;DOCS-5071&lt;/del&gt;&lt;/a&gt; to document &lt;tt&gt;config.actionlog&lt;/tt&gt;. Let&apos;s hear from &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=kay.kim&quot; class=&quot;user-hover&quot; rel=&quot;kay.kim&quot;&gt;kay.kim&lt;/a&gt; on whether not documenting the sizes is expected as this is an internal collection; no further action item on your end &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=sarah.zhou&quot; class=&quot;user-hover&quot; rel=&quot;sarah.zhou&quot;&gt;sarah.zhou&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1945415" author="xgen-internal-githook" created="Thu, 12 Jul 2018 14:16:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36041&quot; title=&quot;Increase the size of changelog and actionlog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36041&quot;&gt;&lt;del&gt;SERVER-36041&lt;/del&gt;&lt;/a&gt; Increase size of changelog and actionlog in sharding_catalog_client_test&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 7bff26918103cb58d3e01f52a61e1286f2f1c4a4)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/232fb87145ebdd0fb43a342c54884f65fb34d43b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/232fb87145ebdd0fb43a342c54884f65fb34d43b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1945414" author="xgen-internal-githook" created="Thu, 12 Jul 2018 14:16:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36041&quot; title=&quot;Increase the size of changelog and actionlog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36041&quot;&gt;&lt;del&gt;SERVER-36041&lt;/del&gt;&lt;/a&gt; Increase the size of changelog and actionlog&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a7f2cf99a1ab6548eff63d3eddafab1134fe6b84)&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/17aebb0ae1265b70ba35c89e85ae911640d35d78&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/17aebb0ae1265b70ba35c89e85ae911640d35d78&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1944326" author="xgen-internal-githook" created="Wed, 11 Jul 2018 15:03:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36041&quot; title=&quot;Increase the size of changelog and actionlog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36041&quot;&gt;&lt;del&gt;SERVER-36041&lt;/del&gt;&lt;/a&gt; Increase the size of changelog and actionlog&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a7f2cf99a1ab6548eff63d3eddafab1134fe6b84)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c6554668d9a4b6a7bdc107bd96c916f5b04bc307&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c6554668d9a4b6a7bdc107bd96c916f5b04bc307&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1944325" author="xgen-internal-githook" created="Wed, 11 Jul 2018 15:03:27 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36041&quot; title=&quot;Increase the size of changelog and actionlog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36041&quot;&gt;&lt;del&gt;SERVER-36041&lt;/del&gt;&lt;/a&gt; Increase size of changelog and actionlog in sharding_catalog_client_test&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 7bff26918103cb58d3e01f52a61e1286f2f1c4a4)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/13942929a54621c15afe6b9f5d6aff26882bb681&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/13942929a54621c15afe6b9f5d6aff26882bb681&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1943721" author="xgen-internal-githook" created="Tue, 10 Jul 2018 21:11:08 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36041&quot; title=&quot;Increase the size of changelog and actionlog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36041&quot;&gt;&lt;del&gt;SERVER-36041&lt;/del&gt;&lt;/a&gt; Increase size of changelog and actionlog in sharding_catalog_client_test&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7bff26918103cb58d3e01f52a61e1286f2f1c4a4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7bff26918103cb58d3e01f52a61e1286f2f1c4a4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1943431" author="xgen-internal-githook" created="Tue, 10 Jul 2018 17:51:45 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Sarah Zhou&apos;, &apos;email&apos;: &apos;sarah.zhou@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36041&quot; title=&quot;Increase the size of changelog and actionlog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36041&quot;&gt;&lt;del&gt;SERVER-36041&lt;/del&gt;&lt;/a&gt; Increase the size of changelog and actionlog&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a7f2cf99a1ab6548eff63d3eddafab1134fe6b84&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a7f2cf99a1ab6548eff63d3eddafab1134fe6b84&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1942893" author="kaloian.manassiev" created="Tue, 10 Jul 2018 12:29:58 +0000"  >&lt;p&gt;I see no issue with increasing the side of the change and action logs and the proposed sizes seem reasonable to me. It is a matter of just changing &lt;a href=&quot;https://github.com/mongodb/mongo/blob/e86d684515abe1c4dbf79dbb71741b5db0317039/src/mongo/s/catalog/sharding_catalog_client_impl.cpp#L96&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;these constants&lt;/a&gt;.&lt;/p&gt;</comment>
                    </comments>
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