<!-- 
RSS generated by JIRA (9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66) at Thu Feb 08 05:34:57 UTC 2024

It is possible to restrict the fields that are returned in this document by specifying the 'field' parameter in your request.
For example, to request only the issue key and summary append 'field=key&field=summary' to the URL of your request.
-->
<rss version="0.92" >
<channel>
    <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-54939] Investigate secondary batching behavior in v4.4</title>
                <link>https://jira.mongodb.org/browse/SERVER-54939</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53667&quot; title=&quot;High rate of journal flushes on secondary in 4.4&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53667&quot;&gt;&lt;del&gt;SERVER-53667&lt;/del&gt;&lt;/a&gt; reported that 4.4 secondaries were seen to be applying oplogs in a much larger number of batches than seen in 4.2. We should see whether there was a regression in batch behavior from 4.2 to 4.4.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1638751">SERVER-54939</key>
            <summary>Investigate secondary batching behavior in v4.4</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="matthew.russotto@mongodb.com">Matthew Russotto</assignee>
                                    <reporter username="jason.chan@mongodb.com">Jason Chan</reporter>
                        <labels>
                    </labels>
                <created>Thu, 4 Mar 2021 00:58:02 +0000</created>
                <updated>Mon, 19 Dec 2022 22:37:23 +0000</updated>
                            <resolved>Mon, 13 Jun 2022 15:26:54 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>32</watches>
                                                                                                                <comments>
                            <comment id="4611370" author="matthew.russotto" created="Mon, 13 Jun 2022 15:26:14 +0000"  >&lt;p&gt;The reduced batch size on 4.4 is due to changes designed to improve read concern majority latency. We have added a tunable parameter in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65723&quot; title=&quot;Add tunable parameter to improve batching on secondaries&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65723&quot;&gt;&lt;del&gt;SERVER-65723&lt;/del&gt;&lt;/a&gt; to allow increased batching at the cost of higher read concern majority latency.&lt;/p&gt;</comment>
                            <comment id="3682082" author="judah.schvimer" created="Wed, 24 Mar 2021 18:04:54 +0000"  >&lt;p&gt;In order for writeConcern &apos;majority&apos; to provide its durability, journaling is required. Depending on the value of &lt;a href=&quot;https://docs.mongodb.com/manual/reference/replica-configuration/#rsconf.writeConcernMajorityJournalDefault&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;&lt;tt&gt;writeConcernMajorityJournalDefault&lt;/tt&gt;&lt;/a&gt;, writeConcern &apos;majority&apos; will journal by default, and will not journal if j:false or that flag (set to false) are provided (with some quirks with the inMemory storage engine).&lt;/p&gt;</comment>
                            <comment id="3682069" author="dianna.hohensee" created="Wed, 24 Mar 2021 17:58:53 +0000"  >&lt;p&gt;If I understand &apos;majority&apos; write concern correctly, it doesn&apos;t implicitly require {j:true}. Therefore, it would make a lot of sense to me to use your proposal of a {requiresFlush: true} flag whenever the user specifies {j:true}, and otherwise let journal flushing occur on a periodic basis.&lt;/p&gt;

&lt;p&gt;I don&apos;t remember how we determine majority committed, whether it currently depends upon durability as well as majority. This might have to change, if we&apos;re doing stronger guarantees than necessary. We would also need to survey, perhaps, what operations need persistence vs what ops don&apos;t; or alternatively, make all internal ops attach {requiresFlush: true} initially, and remove them later on on an individual basis. I think the latter would be safer, as I wouldn&apos;t be surprised if there are a lot of subtleties around this sort of thing, but I don&apos;t know.&lt;/p&gt;</comment>
                            <comment id="3665350" author="JIRAUSER1253371" created="Mon, 15 Mar 2021 20:11:27 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=lingzhi.deng&quot; class=&quot;user-hover&quot; rel=&quot;lingzhi.deng&quot;&gt;lingzhi.deng&lt;/a&gt;&#160;- do we have an approximate timeframe on this fix? Bell is saying they&apos;ll hold off on their planned upgrade until we have resolution.&lt;/p&gt;</comment>
                            <comment id="3652858" author="eric.lafontaine@bell.ca" created="Mon, 8 Mar 2021 19:39:43 +0000"  >&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;I will be watching this issue along with &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53667&quot; title=&quot;High rate of journal flushes on secondary in 4.4&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53667&quot;&gt;&lt;del&gt;SERVER-53667&lt;/del&gt;&lt;/a&gt;, I require a fix ASAP.&#160; Some production workload is running with this version as we weren&apos;t observing that behaviour in Dev.&lt;/p&gt;

&lt;p&gt;Regards,&lt;/p&gt;

&lt;p&gt;Eric Lafontaine&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10420">
                    <name>Backports</name>
                                            <outwardlinks description="backported by">
                                                        </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="1584556">SERVER-53667</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="1659586">DOCS-14315</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="1584556">SERVER-53667</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1662690">SERVER-55606</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2190165">SERVER-71503</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2027032">SERVER-65723</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="1368186">SERVER-48522</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1867214">SERVER-59776</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="306129" name="majority writes v4.4.png" size="72791" author="lingzhi.deng@mongodb.com" created="Tue, 23 Mar 2021 15:28:13 +0000"/>
                            <attachment id="305919" name="oplogFetcherUsesExhaust=false.png" size="96632" author="lingzhi.deng@mongodb.com" created="Mon, 22 Mar 2021 14:49:25 +0000"/>
                            <attachment id="305918" name="v4.2.png" size="99600" author="lingzhi.deng@mongodb.com" created="Mon, 22 Mar 2021 14:42:34 +0000"/>
                            <attachment id="305922" name="v4.4.png" size="99752" author="lingzhi.deng@mongodb.com" created="Mon, 22 Mar 2021 14:58:58 +0000"/>
                            <attachment id="306443" name="w-majority-8-threads.png" size="102618" author="lingzhi.deng@mongodb.com" created="Wed, 24 Mar 2021 19:03:34 +0000"/>
                    </attachments>
                <subtasks>
                    </subtasks>
                <customfields>
                                                <customfield id="customfield_10050" key="com.atlassian.jira.toolkit:comments">
                        <customfieldname># Replies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>5.0</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18555" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname># of Sprints</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>10.0</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                <customfield id="customfield_12450" key="com.atlassian.jira.plugin.system.customfieldtypes:multicheckboxes">
                        <customfieldname>Backport Requested</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="21777"><![CDATA[v5.0]]></customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_13552" key="com.go2group.jira.plugin.crm:crm_generic_field">
                        <customfieldname>Case</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue><![CDATA[[5002K00000rzvmxQAA, 5002K00000xDlvMQAS, 5002K00000tTXUIQA4]]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                            <customfield id="customfield_10055" key="com.atlassian.jira.ext.charting:firstresponsedate">
                        <customfieldname>Date of 1st Reply</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>Mon, 8 Mar 2021 19:39:43 +0000</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10052" key="com.atlassian.jira.toolkit:dayslastcommented">
                        <customfieldname>Days since reply</customfieldname>
                        <customfieldvalues>
                                        1 year, 34 weeks, 2 days ago
    
                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_18254" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Dependencies</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue><![CDATA[]]></customfieldvalue>


                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_15850" key="com.atlassian.jira.plugins.jira-development-integration-plugin:devsummary">
                        <customfieldname>Development</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            <customfield id="customfield_10057" key="com.atlassian.jira.toolkit:lastusercommented">
                        <customfieldname>Last comment by Customer</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>true</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_10056" key="com.atlassian.jira.toolkit:lastupdaterorcommenter">
                        <customfieldname>Last commenter</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>alan.zheng@mongodb.com</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_11151" key="com.atlassian.jira.toolkit:LastCommentDate">
                        <customfieldname>Last public comment date</customfieldname>
                        <customfieldvalues>
                            1 year, 34 weeks, 2 days ago
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                    <customfield id="customfield_10051" key="com.atlassian.jira.toolkit:participants">
                        <customfieldname>Participants</customfieldname>
                        <customfieldvalues>
                                        <customfieldvalue>dianna.hohensee@mongodb.com</customfieldvalue>
            <customfieldvalue>eric.lafontaine@bell.ca</customfieldvalue>
            <customfieldvalue>jason.chan@mongodb.com</customfieldvalue>
            <customfieldvalue>judah.schvimer@mongodb.com</customfieldvalue>
            <customfieldvalue>matthew.russotto@mongodb.com</customfieldvalue>
            <customfieldvalue>russell.andolina@mongodb.com</customfieldvalue>
    
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                        <customfield id="customfield_14254" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Product Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hyxqnb:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                <customfield id="customfield_12550" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>2|hr242v:0i</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                <customfield id="customfield_10558" key="com.pyxis.greenhopper.jira:gh-global-rank">
                        <customfieldname>Rank (Obsolete)</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>9223372036854775807</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                <customfield id="customfield_10557" key="com.pyxis.greenhopper.jira:gh-sprint">
                        <customfieldname>Sprint</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue id="4762">Repl 2021-03-22</customfieldvalue>
    <customfieldvalue id="4798">Repl 2021-04-05</customfieldvalue>
    <customfieldvalue id="5709">Repl 2022-03-21</customfieldvalue>
    <customfieldvalue id="5710">Repl 2022-04-04</customfieldvalue>
    <customfieldvalue id="5711">Repl 2022-04-18</customfieldvalue>
    <customfieldvalue id="5995">Repl 2022-05-02</customfieldvalue>
    <customfieldvalue id="6170">Repl 2022-05-16</customfieldvalue>
    <customfieldvalue id="6248">Repl 2022-05-30</customfieldvalue>
    <customfieldvalue id="6249">Repl 2022-06-13</customfieldvalue>
    <customfieldvalue id="6250">Repl 2022-06-27</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                            <customfield id="customfield_10053" key="com.atlassian.jira.ext.charting:timeinstatus">
                        <customfieldname>Time In Status</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        <customfield id="customfield_22870" key="com.onresolve.jira.groovy.groovyrunner:scripted-field">
                        <customfieldname>Triagers</customfieldname>
                        <customfieldvalues>
                                

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                    <customfield id="customfield_14350" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>serverRank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1|hyxcwf:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                    </customfields>
    </item>
</channel>
</rss>