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    <title>Magnolia - Issue tracker</title>
    <link>https://jira.magnolia-cms.com</link>
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    <language>en-uk</language>    <build-info>
        <version>9.4.2</version>
        <build-number>940002</build-number>
        <build-date>19-01-2023</build-date>
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<item>
            <title>[MGNLCACHE-250] DOC: CacheMonitor performance: improve or document properly the implications </title>
                <link>https://jira.magnolia-cms.com/browse/MGNLCACHE-250</link>
                <project id="10670" key="MGNLCACHE">Cache Modules</project>
                    <description>&lt;p&gt;&lt;tt&gt;CacheMonitor&lt;/tt&gt; mbean exposes various metrics that can be scraped by the monitoring systems such as Prometheus or DataDog. Scraping a couple of those metrics though can have some serious implications on the system&apos;s memory allocation footprint and/or performance in general:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&lt;tt&gt;info.magnolia.module.cache.mbean.CacheMonitor#getCachedKeysCount&lt;/tt&gt;&lt;/li&gt;
	&lt;li&gt;&lt;tt&gt;info.magnolia.module.cache.mbean.CacheMonitor#getCachedUUIDsCount&lt;/tt&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Both of the above perform some aggregate calculations over the entries stored in cache and may accidentally cause a multitude of those to be loaded in memory just for the iterative counting purposes.&lt;/p&gt;

&lt;p&gt;Scaping those metrics should be done carefully and our documentation needs to address that. (or we can eliminate them completely, or somehow improve their performance which I doubt)&lt;/p&gt;</description>
                <environment></environment>
        <key id="105456">MGNLCACHE-250</key>
            <summary>DOC: CacheMonitor performance: improve or document properly the implications </summary>
                <type id="3" iconUrl="https://jira.magnolia-cms.com/secure/viewavatar?size=xsmall&amp;avatarId=10898&amp;avatarType=issuetype">Task</type>
                                            <priority id="6" iconUrl="https://jira.magnolia-cms.com/images/icons/priorities/neutral.gif">Neutral</priority>
                        <status id="1" iconUrl="https://jira.magnolia-cms.com/images/icons/statuses/open.png" description="The issue is open and ready for the assignee to start work on it.">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="apchelintcev">Aleksandr Pchelintcev</reporter>
                        <labels>
                    </labels>
                <created>Tue, 7 Dec 2021 21:22:45 +0100</created>
                <updated>Tue, 15 Mar 2022 14:46:16 +0100</updated>
                                            <version>5.9.4</version>
                                                        <due></due>
                            <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="286967" author="apchelintcev" created="Tue, 7 Dec 2021 21:27:24 +0100"  >&lt;p&gt;cc &lt;a href=&quot;https://jira.magnolia-cms.com/secure/ViewProfile.jspa?name=mdrapela&quot; class=&quot;user-hover&quot; rel=&quot;mdrapela&quot;&gt;mdrapela&lt;/a&gt;, &lt;a href=&quot;https://jira.magnolia-cms.com/secure/ViewProfile.jspa?name=amansell&quot; class=&quot;user-hover&quot; rel=&quot;amansell&quot;&gt;amansell&lt;/a&gt;&lt;/p&gt;</comment>
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