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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-9862] it returns 0ms by executing explain,but i get the result slowly</title>
                <link>https://jira.mongodb.org/browse/SERVER-9862</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hi:&lt;br/&gt;
I found that it&apos;s slowly sometimes when i had kept executing the same query,&lt;br/&gt;
but the explain shows it costs 0ms!  &lt;/p&gt;

&lt;p&gt;The first snapshot picture: &lt;br/&gt;
    it tells me that costs 0ms.&lt;br/&gt;
The second snapshot picture:&lt;br/&gt;
    i run &quot;./bin/mongosniff --source NET lo  27032&quot;&lt;br/&gt;
The last snapshot picture:&lt;br/&gt;
    &quot;strace -p xxxx -tt -T&quot;, xxxx is the pid of the snapshot picture&lt;/p&gt;</description>
                <environment>linux 2.6.18-92.el5 x86_64</environment>
        <key id="77943">SERVER-9862</key>
            <summary>it returns 0ms by executing explain,but i get the result slowly</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="9">Done</resolution>
                                        <assignee username="david.hows">David Hows</assignee>
                                    <reporter username="handy">handyyu</reporter>
                        <labels>
                    </labels>
                <created>Wed, 5 Jun 2013 07:35:56 +0000</created>
                <updated>Wed, 10 Dec 2014 23:18:40 +0000</updated>
                            <resolved>Tue, 20 Aug 2013 02:54:07 +0000</resolved>
                                    <version>2.0.2</version>
                                                    <component>Performance</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="374438" author="david.hows" created="Fri, 5 Jul 2013 04:18:21 +0000"  >&lt;p&gt;Hi Handyyu,&lt;/p&gt;

&lt;p&gt;I cant see any timestamps on those mongosniff or outputs.&lt;/p&gt;

&lt;p&gt;Can you describe what you mean by &quot;slow&quot;? How do you see this slowness? &lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
David&lt;/p&gt;</comment>
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                            <attachment id="27613" name="2.jpg" size="157051" author="handy" created="Wed, 5 Jun 2013 07:35:56 +0000"/>
                            <attachment id="27614" name="3.jpg" size="20865" author="handy" created="Wed, 5 Jun 2013 07:35:56 +0000"/>
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