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    <title>MongoDB Jira</title>
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    <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>[CDRIVER-2371] mongoc_collection_aggregate only uses batchSize for first batch</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-2371</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;At least as far back as libmongoc 1.6, the &quot;batchSize&quot; field in mongoc_collection_aggregate&apos;s &quot;opts&quot; argument is used only for the first batch, and subsequent batches accept the server&apos;s default batch size.&lt;/p&gt;</description>
                <environment></environment>
        <key id="458354">CDRIVER-2371</key>
            <summary>mongoc_collection_aggregate only uses batchSize for first batch</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="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="pavithra.vetriselvan@mongodb.com">Pavithra Vetriselvan</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Tue, 14 Nov 2017 15:41:12 +0000</created>
                <updated>Sat, 28 Oct 2023 11:30:19 +0000</updated>
                            <resolved>Wed, 13 Dec 2017 22:55:03 +0000</resolved>
                                                    <fixVersion>1.10.0</fixVersion>
                                    <component>libmongoc</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1748934" author="xgen-internal-githook" created="Mon, 11 Dec 2017 21:08:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Pavithra Vetriselvan&apos;, &apos;email&apos;: &apos;pavi@MacBook-Pro-77.local&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-2371&quot; title=&quot;mongoc_collection_aggregate only uses batchSize for first batch&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-2371&quot;&gt;&lt;del&gt;CDRIVER-2371&lt;/del&gt;&lt;/a&gt; make mongoc_collection_aggregate use batchSize for multiple batches&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/334fed1a5db71f9e9f38ef6256c285969427e232&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/334fed1a5db71f9e9f38ef6256c285969427e232&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1741834" author="jesse" created="Mon, 4 Dec 2017 18:40:24 +0000"  >&lt;p&gt;Here&apos;s a branch that reproduces the bug using a mock-server test:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/ajdavis/mongo-c-driver/tree/CDRIVER-2371&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/ajdavis/mongo-c-driver/tree/CDRIVER-2371&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;We&apos;ll need to set the batch size on the cursor. I think the fix should go near the end of mongoc_collection_aggregate(), maybe as simple as calling mongoc_cursor_set_batch_size on the new mongoc_cursor_t struct? We must also update the documentation in mongoc_collection_aggregate.rst to mention the &quot;batchSize&quot; option in the &quot;opts&quot; argument.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="488556">PHPLIB-312</issuekey>
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