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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>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-22330] Impact of field names</title>
                <link>https://jira.mongodb.org/browse/SERVER-22330</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We are mapping one type of our existing in-memory objects to mongodb. All field names are predefined and they have been used in production.&lt;/p&gt;

&lt;p&gt;I did some simple experiment - if the field is an indexed field, the long field name seems to have a big performance (throughput) impact.&lt;/p&gt;

&lt;p&gt;If the field is not an indexed field, the long field name seems to have very little impact, performance wise or storage wise.&lt;/p&gt;

&lt;p&gt;I am using wiredTiger which by default has compression enabled.&lt;br/&gt;
My test is a batch loading app.&lt;/p&gt;

&lt;p&gt;Some mongodb blog mentions that wiredTiger compression will make the long field names less of an issue for storage and for performance. &lt;br/&gt;
Since based on my experiment, that&apos;s not the case. I would like to have a better understanding on how long field names impact performance:&lt;br/&gt;
1. Is there any configuration recommendations for handling repeated long field names? &lt;br/&gt;
2. What is the performance and storage (memory) impact of long indexed field names?&lt;br/&gt;
3. What is the performance and storage impact of long non-indexed field names?&lt;/p&gt;

&lt;p&gt;Thanks in advance!&lt;br/&gt;
Judy&lt;/p&gt;</description>
                <environment>Linux 2.6.32-504.3.3.el6.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux&lt;br/&gt;
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        <key id="261261">SERVER-22330</key>
            <summary>Impact of field names</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="-1">Unassigned</assignee>
                                    <reporter username="Judy.Han">Judy Han [X]</reporter>
                        <labels>
                    </labels>
                <created>Wed, 27 Jan 2016 19:37:01 +0000</created>
                <updated>Fri, 29 Jan 2016 23:21:03 +0000</updated>
                            <resolved>Fri, 29 Jan 2016 12:51:35 +0000</resolved>
                                                                    <component>WiredTiger</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1157733" author="ramon.fernandez" created="Fri, 29 Jan 2016 12:51:25 +0000"  >&lt;p&gt;Thanks for your report &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=Judy.Han&quot; class=&quot;user-hover&quot; rel=&quot;Judy.Han&quot;&gt;Judy.Han&lt;/a&gt;. Please note that the SERVER project is for reporting bugs or feature suggestions for the MongoDB server. For MongoDB-related support discussion please post on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt; or &lt;a href=&quot;http://stackoverflow.com/questions/tagged/mongodb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Stack Overflow with the &lt;tt&gt;mongodb&lt;/tt&gt; tag&lt;/a&gt;, where your question will reach a larger audience. A question like this involving more discussion would be best posted on the &lt;a href=&quot;http://groups.google.com/group/mongodb-user&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mongodb-user group&lt;/a&gt;. See also our &lt;a href=&quot;https://www.mongodb.org/about/support/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Technical Support page&lt;/a&gt; for additional support resources.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Ram&#243;n&lt;/p&gt;</comment>
                            <comment id="1155864" author="alexander.gorrod" created="Wed, 27 Jan 2016 21:29:13 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=Judy.Han&quot; class=&quot;user-hover&quot; rel=&quot;Judy.Han&quot;&gt;Judy.Han&lt;/a&gt; I have moved this ticket from WiredTiger to Core Server, since it is related to MongoDB usage of WiredTiger.&lt;/p&gt;</comment>
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