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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-56898] investigate library exclusion interface for PCH tool</title>
                <link>https://jira.mongodb.org/browse/SERVER-56898</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;While working on&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55839&quot; title=&quot;Evaluate feasibility and impact of using &amp;quot;chained&amp;quot; PCH on Windows&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55839&quot;&gt;&lt;del&gt;SERVER-55839&lt;/del&gt;&lt;/a&gt;&#160;it was found that certain libraries did not play nice with the following header set inside the mongo/db directory:&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;
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					&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;#include &amp;lt;mongo/db/namespace_string.h&amp;gt;&lt;/span&gt;&lt;/pre&gt;
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						&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;#include &amp;lt;mongo/db/commands.h&amp;gt;&lt;/span&gt;&lt;/pre&gt;
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						&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;#include &amp;lt;mongo/db/auth/authorization_session.h&amp;gt;&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;The libraries which had issues were src/mongo/db/query/datetime/date_time_support and src/mongo/db/repl/split_horizon.&lt;/p&gt;

&lt;p&gt;For the investigation being performed in the mentioned ticket, these library were all together excluded from PCH to not spend to much time on the issue and still demonstrate measurable gains.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Instead of excluding the library all together at the library declaration, it would be more preferable to&#160;have it exclude the particular library for the particular PCH at the PCH declaration for neatness and making those libraries be selective for other pch&apos;s.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;This would also allow issues found from certain libraries to not prevent potential performance gains, while other teams investigate and potentially fix such issues.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1713076">SERVER-56898</key>
            <summary>investigate library exclusion interface for PCH tool</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-devplatform">[DO NOT ASSIGN] Backlog - Server Development Platform Team (SDP)</assignee>
                                    <reporter username="daniel.moody@mongodb.com">Daniel Moody</reporter>
                        <labels>
                    </labels>
                <created>Wed, 12 May 2021 19:02:59 +0000</created>
                <updated>Tue, 6 Dec 2022 01:18:37 +0000</updated>
                            <resolved>Mon, 28 Jun 2021 15:34:31 +0000</resolved>
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