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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-40155] Configurable Heap Profiler Maximums</title>
                <link>https://jira.mongodb.org/browse/SERVER-40155</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently the heap profiler will stop collecting information once it hits a hardcoded maximum. Messages like the following will be printed out once in the logs:&lt;/p&gt;
&lt;p/&gt;
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&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-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;too many live objects; disabling heap profiling&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;For situations where more data collection is necessary, it would be useful to set a different maximum so these limits don&apos;t get hit.&lt;/p&gt;</description>
                <environment></environment>
        <key id="717322">SERVER-40155</key>
            <summary>Configurable Heap Profiler Maximums</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="daniel.hatcher@mongodb.com">Danny Hatcher</reporter>
                        <labels>
                    </labels>
                <created>Fri, 15 Mar 2019 14:18:53 +0000</created>
                <updated>Tue, 6 Dec 2022 03:03:29 +0000</updated>
                            <resolved>Mon, 7 Dec 2020 19:38:55 +0000</resolved>
                                                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>11</watches>
                                                                                                                <comments>
                            <comment id="2342525" author="acm" created="Wed, 24 Jul 2019 22:25:55 +0000"  >&lt;p&gt;Moving out of the libunwind epic and into quick wins. While we do need to make some changes here per &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-42406&quot; title=&quot;Provide abstract backtrace support API&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-42406&quot;&gt;&lt;del&gt;SERVER-42406&lt;/del&gt;&lt;/a&gt; in order for the heap profiler to use libunwind, the changes suggested in this ticket are unrelated.&lt;/p&gt;</comment>
                            <comment id="2191723" author="daniel.hatcher" created="Tue, 26 Mar 2019 13:57:59 +0000"  >&lt;p&gt;No, I have never personally seen the &quot;too many live objects&quot;. If reducing the scope of this ticket to just configuring the max number of stacks is more feasible I am fine with that.&lt;/p&gt;</comment>
                            <comment id="2190284" author="bruce.lucas@10gen.com" created="Mon, 25 Mar 2019 11:59:48 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=daniel.hatcher&quot; class=&quot;user-hover&quot; rel=&quot;daniel.hatcher&quot;&gt;daniel.hatcher&lt;/a&gt;, do you have an instance where &quot;too many live objects&quot; was seen? This should only occur when the amount of memory is huge, &amp;gt; 256 GB, and in that case it can be avoided by increasing the sampleIntervalBytes parameter to reduce the number of live objects that have to be tracked.&lt;/p&gt;

&lt;p&gt;In any case care would need to be taken regarding performance if kMaxObjInfos were made a parameter, as that would eliminate compiler optimizations that are possible since it&apos;s a compile-time constant.&lt;/p&gt;

&lt;p&gt;We could instead add a note to the &quot;too many live objects&quot; message to &quot;consider increasing sampleIntervalBytes&quot; to make this clearer.&lt;/p&gt;</comment>
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