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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-71882] Add serverStatus metric for the number of entries evicted from the telemetry store</title>
                <link>https://jira.mongodb.org/browse/SERVER-71882</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, LRUKeyValue (used by each partition in the telemetry store to cache entries) memory budget tracker only considers the memory used by the value in the &amp;lt;key, value&amp;gt; pair saved to LRUKeyValue KVList. The memory budget tracker needs to be updates to track all the memory used by LRUKeyValue: the key, the value, the map that associates keys to their position in KVList. This ticket will account for the memory used by the key and the value. A subsequent ticket address tracking the memory used by KVMap.&lt;/p&gt;

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

&lt;p&gt;Without this change, entries are only evicted when the amount of memory allocated to a partition is too small to accommodate even a single entry or when 20k queries are run with small cache size and default partition number (1024)**. Thus, in order to record number of entries evict, we need to evict some. And in order to evict, we need to record the amount of memory being used accurately.&lt;/p&gt;

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

&lt;p&gt;&#160;&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;
	&lt;ul&gt;
		&lt;li&gt;for the purposes of this ticket, a unit test will be written to change the number of partitions in order to create a small cache with few partitions that has a small bar for evicting entries.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2203714">SERVER-71882</key>
            <summary>Add serverStatus metric for the number of entries evicted from the telemetry store</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="13201">Fixed</resolution>
                                        <assignee username="maddie.zechar@mongodb.com">Maddie Zechar</assignee>
                                    <reporter username="joshua.lapacik@mongodb.com">Joshua Lapacik</reporter>
                        <labels>
                    </labels>
                <created>Tue, 6 Dec 2022 16:02:18 +0000</created>
                <updated>Sun, 29 Oct 2023 21:29:39 +0000</updated>
                            <resolved>Tue, 7 Feb 2023 13:58:29 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="5172789" author="xgen-internal-githook" created="Tue, 7 Feb 2023 01:35:24 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Maddie Zechar&apos;, &apos;email&apos;: &apos;mez2113@columbia.edu&apos;, &apos;username&apos;: &apos;madelinezec&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71882&quot; title=&quot;Add serverStatus metric for the number of entries evicted from the telemetry store&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71882&quot;&gt;&lt;del&gt;SERVER-71882&lt;/del&gt;&lt;/a&gt; Add serverStatus metric for the number of entries evicted from the telemetry store&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/967a6745ba487edaff558e36fdc572c6ca066fea&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/967a6745ba487edaff558e36fdc572c6ca066fea&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2203727">SERVER-71883</issuekey>
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