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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-2235] IndexScan should track the number of calls to seek() and expose in explain</title>
                <link>https://jira.mongodb.org/browse/SERVER-2235</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The index scan stage should track the number of calls to BtreeIndexCursor::skip() made here:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.0.0-rc6/src/mongo/db/exec/index_scan.cpp#L438-L439&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/r3.0.0-rc6/src/mongo/db/exec/index_scan.cpp#L438-L439&lt;/a&gt;&lt;/p&gt;

&lt;h5&gt;&lt;a name=&quot;OriginalDescription&quot;&gt;&lt;/a&gt;Original Description&lt;/h5&gt;

&lt;p&gt;Currently nscanned isn&apos;t precise enough to distinguish between unindexed traversal and btree traversal, and in some cases between btree skipping and inorder order btree traversal.&lt;/p&gt;</description>
                <environment></environment>
        <key id="13985">SERVER-2235</key>
            <summary>IndexScan should track the number of calls to seek() and expose in explain</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="9">Done</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                            <label>neweng</label>
                            <label>query_triage</label>
                    </labels>
                <created>Thu, 16 Dec 2010 19:05:25 +0000</created>
                <updated>Mon, 22 Feb 2016 21:34:14 +0000</updated>
                            <resolved>Wed, 3 Feb 2016 16:58:32 +0000</resolved>
                                                    <fixVersion>3.3.2</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1162485" author="xgen-internal-githook" created="Wed, 3 Feb 2016 16:56:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2235&quot; title=&quot;IndexScan should track the number of calls to seek() and expose in explain&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2235&quot;&gt;&lt;del&gt;SERVER-2235&lt;/del&gt;&lt;/a&gt; add the number of IXSCAN seeks to explain executionStats output&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c8f086a3a52c8793c3f9857cddbff37dc7bcc37d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c8f086a3a52c8793c3f9857cddbff37dc7bcc37d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="813201" author="david.storch" created="Mon, 26 Jan 2015 17:10:44 +0000"  >&lt;p&gt;Changes to explain made in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-10448&quot; title=&quot;Revamp explain() formatting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-10448&quot;&gt;&lt;del&gt;SERVER-10448&lt;/del&gt;&lt;/a&gt; should make it easy to use the &lt;tt&gt;totalKeysExamined&lt;/tt&gt; and &lt;tt&gt;totalDocsExamined&lt;/tt&gt; metrics to distinguish between collection scans and index scans. I am converting this ticket into the second part of this feature request, which is to separately track the number of btree skips so that this can be distinguished from in-order btree traversal.&lt;/p&gt;</comment>
                    </comments>
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                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="262941">DOCS-7086</issuekey>
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                                        <issuelink>
            <issuekey id="19410">SERVER-3414</issuekey>
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