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    <title>MongoDB Jira</title>
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    <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-83981] Investigate configuring SyncServerOptions in gRPC</title>
                <link>https://jira.mongodb.org/browse/SERVER-83981</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When doing initial perf testing for gRPC, we saw that it spent a lot of time synchronizing the completion queue.&lt;/p&gt;

&lt;p&gt;We were curious if changing the gRPC &lt;a href=&quot;https://grpc.github.io/grpc/cpp/classgrpc_1_1_server_builder.html#aff66bd93cba7d4240a64550fe1fca88d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;SyncServerOptions&lt;/a&gt; might improve the performance-- investigate changing the number of completion queues and polling threads, and evaluate whether or not this improves the performance.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2519211">SERVER-83981</key>
            <summary>Investigate configuring SyncServerOptions in gRPC</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="9">Done</resolution>
                                        <assignee username="erin.mcnulty@mongodb.com">Erin McNulty</assignee>
                                    <reporter username="erin.mcnulty@mongodb.com">Erin McNulty</reporter>
                        <labels>
                    </labels>
                <created>Thu, 7 Dec 2023 18:28:11 +0000</created>
                <updated>Mon, 11 Dec 2023 16:11:39 +0000</updated>
                            <resolved>Thu, 7 Dec 2023 18:32:50 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5933770" author="JIRAUSER1260475" created="Thu, 7 Dec 2023 18:32:28 +0000"  >&lt;p&gt;I made the SyncServerOptions a server parameter &lt;a href=&quot;https://github.com/10gen/mongo/compare/master...grpc-perf-testing?expand=1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;in my testing&lt;/a&gt;, and the results are &lt;a href=&quot;https://docs.google.com/spreadsheets/d/17lD9jwTe_BnLlIPEvY1r-28eJs_YlnLT0ek55IQy5AA/edit#gid=728429835&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;summarized here&lt;/a&gt;. Note that the testing branch contains quite a few different changes, but the ones that explicitly note the sync server options are the only relevant ones.&lt;/p&gt;

&lt;p&gt;TLDR is that we didn&apos;t see any noticeable perf difference when changing the configurations-- when walking through the code I was not convinced that gRPC was actually &lt;em&gt;using&lt;/em&gt; the different completion queues, even when they were provided. We concluded that changing the SyncServerOptions probably will not amount to any meaningful perf difference.&lt;/p&gt;</comment>
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