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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>[COMPASS-5353] Compass not showing full count on Online Archive</title>
                <link>https://jira.mongodb.org/browse/COMPASS-5353</link>
                <project id="13182" key="COMPASS">Compass </project>
                    <description>
&lt;h3&gt;&lt;a name=&quot;ProblemStatement%2FRationale&quot;&gt;&lt;/a&gt;&lt;b&gt;Problem Statement/Rationale&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;What is going wrong?  What action would you like the Engineering team to take?&lt;/font&gt;&lt;br/&gt;
In HELP-29658, we found that the count displayed on Compass for Online Archive was not accurate. There should have been ~1million documents archived but only 22,000 was being displayed. We narrowed down that this was a Compass issue by having the customer run .count() on the shell where it returned the expected 1 million.&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;StepstoReproduce&quot;&gt;&lt;/a&gt;&lt;b&gt;Steps to Reproduce&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;How could an engineer replicate the issue you&#8217;re reporting?&lt;/font&gt;&lt;br/&gt;
1. Create M10 cluster&lt;br/&gt;
2. Load sample data set&lt;br/&gt;
3. Create online archive on &lt;tt&gt;sample_airbnb.listingsAndReviews&lt;/tt&gt; with &lt;tt&gt;last_review&lt;/tt&gt; as date field&lt;br/&gt;
4. After a few minutes connect to the Online Archive via Compass to verify count is different when you connect via the shell&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;ExpectedResults&quot;&gt;&lt;/a&gt;&lt;b&gt;Expected Results&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;What do you expect to happen?&lt;/font&gt;&lt;br/&gt;
Count from Compass is the same as count in the shell&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;ActualResults&quot;&gt;&lt;/a&gt;&lt;b&gt;Actual Results&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;What do you observe is happening?&lt;/font&gt;&lt;br/&gt;
They are not the same.&lt;/p&gt;

&lt;h3&gt;&lt;a name=&quot;AdditionalNotes&quot;&gt;&lt;/a&gt;&lt;b&gt;Additional Notes&lt;/b&gt;&lt;/h3&gt;
&lt;p&gt;&lt;font color=&quot;#505f79&quot;&gt;Any additional information that may be useful to include.&lt;/font&gt;&lt;/p&gt;

</description>
                <environment></environment>
        <key id="1942488">COMPASS-5353</key>
            <summary>Compass not showing full count on Online Archive</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="10953" iconUrl="https://jira.mongodb.org/images/icons/statuses/generic.png" description="">Waiting (Blocked)</status>
                    <statusCategory id="4" key="indeterminate" colorName="inprogress"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="yuta.arai@mongodb.com">Yuta Arai</reporter>
                        <labels>
                    </labels>
                <created>Fri, 3 Dec 2021 22:45:10 +0000</created>
                <updated>Wed, 31 May 2023 13:45:09 +0000</updated>
                                                                            <component>Count</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4425731" author="rhys.howell" created="Tue, 22 Mar 2022 02:49:24 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=yuta.arai&quot; class=&quot;user-hover&quot; rel=&quot;yuta.arai&quot;&gt;yuta.arai&lt;/a&gt;&lt;br/&gt;
What&apos;s happening here is that Online Archive caches responses to the collStats command. Compass uses collStats to show the estimated document count and storage size you&apos;re seeing on the collections page. So this behavior is expected since the TTL of the cache is 7 days.&lt;br/&gt;
If you&apos;d like to fetch the collStats information and bypass the cache you can append the sync: true option a the function call in mongosh, MongoDB&apos;s shell. Doing this can have fairly significant costs - (it ends up doing a full coll scan of the data lake, which can rack up AWS fees depending on the structure + size of the data).&lt;br/&gt;
We&apos;re currently chatting with the team if we want to show some more information here to users to inform them of this behavior when connected to Atlas Online Archive, and maybe even show actions around refreshing the cache. It&apos;s definitely not transparent currently, sorry for any confusion.&lt;br/&gt;
More info on the collStats behavior: &lt;a href=&quot;https://docs.mongodb.com/datalake/supported-unsupported/diagnostic-commands/#collstats&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/datalake/supported-unsupported/diagnostic-commands/#collstats&lt;/a&gt;&lt;/p&gt;</comment>
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                <issuelinks>
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                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="1978692">COMPASS-5495</issuekey>
        </issuelink>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1438201">COMPASS-4387</issuekey>
        </issuelink>
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