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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>
    </build-info>


<item>
            <title>[SERVER-40444] IndexCatalogEntry should expose NamespaceString to avoid type conversion/allocation in AbstractIndexAccessMethod</title>
                <link>https://jira.mongodb.org/browse/SERVER-40444</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When inserting documents we create a new NamespaceString from a std::string const&amp;amp; causing a memory allocation. One allocation per document and index combination (also affecting insertMany). The NamespaceString is then used to query the ReplicationCoordinator where it does not need to store or keep the NamespaceString making the memory allocation above unnecessary.&lt;/p&gt;

&lt;p&gt;This especially affects performance in mobile/embedded where we most likely are single threaded.&lt;/p&gt;

&lt;p&gt;Partial callstack when running insertMany:&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::AbstractIndexAccessMethod::shouldCheckIndexKeySize(mongo::OperationContext * opCtx) Line 150	C++&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::AbstractIndexAccessMethod::insertKeys(mongo::OperationContext * opCtx, const std::set&amp;lt;mongo::BSONObj,mongo::BSONComparatorInterfaceBase&amp;lt;mongo::BSONObj&amp;gt;::LessThan,std::allocator&amp;lt;mongo::BSONObj&amp;gt; &amp;gt; &amp;amp; keys, const std::set&amp;lt;mongo::BSONObj,mongo::BSONComparatorInterfaceBase&amp;lt;mongo::BSONObj&amp;gt;::LessThan,std::allocator&amp;lt;mongo::BSONObj&amp;gt; &amp;gt; &amp;amp; multikeyMetadataKeys, const std::vector&amp;lt;std::set&amp;lt;unsigned __int64,std::less&amp;lt;unsigned __int64&amp;gt;,std::allocator&amp;lt;unsigned __int64&amp;gt; &amp;gt;,std::allocator&amp;lt;std::set&amp;lt;unsigned __int64,std::less&amp;lt;unsigned __int64&amp;gt;,std::allocator&amp;lt;unsigned __int64&amp;gt; &amp;gt; &amp;gt; &amp;gt; &amp;amp; multikeyPaths, const mongo::RecordId &amp;amp; loc, const mongo::InsertDeleteOptions &amp;amp; options, mongo::InsertResult * result) Line 201	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::AbstractIndexAccessMethod::insert(mongo::OperationContext * opCtx, const mongo::BSONObj &amp;amp; obj, const mongo::RecordId &amp;amp; loc, const mongo::InsertDeleteOptions &amp;amp; options, mongo::InsertResult * result) Line 191	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::IndexCatalogImpl::_indexFilteredRecords(mongo::OperationContext * opCtx, mongo::IndexCatalogEntry * index, const std::vector&amp;lt;mongo::BsonRecord,std::allocator&amp;lt;mongo::BsonRecord&amp;gt; &amp;gt; &amp;amp; bsonRecords, __int64 * keysInsertedOut) Line 1196	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::IndexCatalogImpl::_indexRecords(mongo::OperationContext * opCtx, mongo::IndexCatalogEntry * index, const std::vector&amp;lt;mongo::BsonRecord,std::allocator&amp;lt;mongo::BsonRecord&amp;gt; &amp;gt; &amp;amp; bsonRecords, __int64 * keysInsertedOut) Line 1216	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::IndexCatalogImpl::indexRecords(mongo::OperationContext * opCtx, const std::vector&amp;lt;mongo::BsonRecord,std::allocator&amp;lt;mongo::BsonRecord&amp;gt; &amp;gt; &amp;amp; bsonRecords, __int64 * keysInsertedOut) Line 1285	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::CollectionImpl::_insertDocuments(mongo::OperationContext * opCtx, std::_Vector_const_iterator&amp;lt;std::_Vector_val&amp;lt;std::_Simple_types&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;gt; begin, std::_Vector_const_iterator&amp;lt;std::_Vector_val&amp;lt;std::_Simple_types&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;gt; end, mongo::OpDebug * opDebug) Line 541	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::CollectionImpl::insertDocuments(mongo::OperationContext * opCtx, std::_Vector_const_iterator&amp;lt;std::_Vector_val&amp;lt;std::_Simple_types&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;gt; begin, std::_Vector_const_iterator&amp;lt;std::_Vector_val&amp;lt;std::_Simple_types&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;gt; end, mongo::OpDebug * opDebug, bool fromMigrate) Line 400	C++&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::`anonymous namespace&apos;::insertDocuments(mongo::OperationContext * opCtx, mongo::Collection * collection, std::_Vector_iterator&amp;lt;std::_Vector_val&amp;lt;std::_Simple_types&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;gt; begin, std::_Vector_iterator&amp;lt;std::_Vector_val&amp;lt;std::_Simple_types&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;gt; end, bool fromMigrate) Line 353	C++&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::`anonymous namespace&apos;::insertBatchAndHandleErrors(mongo::OperationContext * opCtx, const mongo::write_ops::Insert &amp;amp; wholeOp, std::vector&amp;lt;mongo::InsertStatement,std::allocator&amp;lt;mongo::InsertStatement&amp;gt; &amp;gt; &amp;amp; batch, mongo::`anonymous-namespace&apos;::LastOpFixer * lastOpFixer, mongo::WriteResult * out, bool fromMigrate) Line 420	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::performInserts(mongo::OperationContext * opCtx, const mongo::write_ops::Insert &amp;amp; wholeOp, bool fromMigrate) Line 572	C++&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongoed.exe!mongo::`anonymous namespace&apos;::CmdInsert::Invocation::runImpl(mongo::OperationContext * opCtx, mongo::BSONObjBuilder &amp;amp; result) Line 300	C++&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="728101">SERVER-40444</key>
            <summary>IndexCatalogEntry should expose NamespaceString to avoid type conversion/allocation in AbstractIndexAccessMethod</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="13201">Fixed</resolution>
                                        <assignee username="henrik.edin@mongodb.com">Henrik Edin</assignee>
                                    <reporter username="henrik.edin@mongodb.com">Henrik Edin</reporter>
                        <labels>
                    </labels>
                <created>Tue, 2 Apr 2019 17:46:35 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:22 +0000</updated>
                            <resolved>Thu, 4 Apr 2019 18:53:33 +0000</resolved>
                                                    <fixVersion>4.1.10</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2200842" author="xgen-internal-githook" created="Wed, 3 Apr 2019 17:33:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Henrik Edin&apos;, &apos;username&apos;: &apos;henrikedin&apos;, &apos;email&apos;: &apos;henrik.edin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40444&quot; title=&quot;IndexCatalogEntry should expose NamespaceString to avoid type conversion/allocation in AbstractIndexAccessMethod&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40444&quot;&gt;&lt;del&gt;SERVER-40444&lt;/del&gt;&lt;/a&gt; IndexCatalogEntry to use NamespaceString instead of plain string. This avoids converting between types later on.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b63457c9e8597a6704b0fb015d827425585a5bef&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b63457c9e8597a6704b0fb015d827425585a5bef&lt;/a&gt;&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="483164">SERVER-32709</issuekey>
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