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    <title>topic Re: VM disk Read/Write latency is more then 300ms in ESXi Discussions</title>
    <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451263#M37267</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Sample2 Image for your reference,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_0.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5690i96CA4D4C6D373B3C/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_0.png" alt="pastedImage_0.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Wed, 31 Oct 2018 04:14:30 GMT</pubDate>
    <dc:creator>Kathirvelkrisha</dc:creator>
    <dc:date>2018-10-31T04:14:30Z</dc:date>
    <item>
      <title>VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451259#M37263</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;&lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;Hi,&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;I am facing latency issue in Particular VM in ESXi 6.0. The VM has Windows server 2012R2 OS. It contains AD user profiles and network share files.&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;Am facing issue only office working hours. While checking Performance Chart I found Disk read and write &lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;latency going more than 300ms.&lt;/STRONG&gt;&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;&lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;Anyone tell me what is the normal disk &lt;STRONG style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;latency&lt;/STRONG&gt;&lt;SPAN style="color: #222222; font-family: arial, sans-serif; font-size: 16px;"&gt;? and any idea about this.&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 30 Oct 2018 14:00:36 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451259#M37263</guid>
      <dc:creator>Kathirvelkrisha</dc:creator>
      <dc:date>2018-10-30T14:00:36Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451260#M37264</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;The normal disk latency depends on the workload. &lt;/P&gt;&lt;P&gt;Values that widely being used:&lt;/P&gt;&lt;P&gt;Good: &amp;lt; 10ms&lt;BR /&gt;Okay: 10 – 20ms&lt;/P&gt;&lt;P&gt;Anything over 20ms can be considered troublesome.&lt;BR /&gt;&lt;BR /&gt;Some recommendations:&lt;/P&gt;&lt;P&gt;Use Storage VMotion to migrate I/O-intensive virtual machines across multiple hosts.&lt;/P&gt;&lt;P&gt;Check swap statistics in the guest operating system to verify that virtual machines have adequate memory. Increase the guest memory if needed. &lt;/P&gt;&lt;P&gt;Use the most current hypervisor software.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 30 Oct 2018 15:56:29 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451260#M37264</guid>
      <dc:creator>RickVerstegen</dc:creator>
      <dc:date>2018-10-30T15:56:29Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451261#M37265</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Thanks, &lt;STRONG style="font-size: 12.6px; font-family: proxima-nova, Arial, sans-serif; color: #666666;"&gt;&lt;A _jive_internal="true" data-avatarid="-1" data-userid="3581204" data-username="RickVerstegen" href="https://communities.vmware.com/people/RickVerstegen" name="&amp;amp;amp;lpos=apps_scodevmw : 115" style="padding: 0 3px 0 0; font-weight: inherit; font-style: inherit; font-size: 1.1em; font-family: inherit; color: #3399cc;"&gt;RickVerstegen&lt;/A&gt;&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I have tried &amp;gt;Use Storage VMotion to migrate I/O-intensive virtual machines across multiple hosts.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Also, I have checked at the time of issue there is no huge memory utilization. &lt;/P&gt;&lt;P style="margin: 2px; font-family: proxima-nova, Arial, sans-serif; color: #666666;"&gt;Check swap statistics in the guest operating system to verify that virtual machines have adequate memory. Increase the guest memory if needed.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 30 Oct 2018 16:03:02 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451261#M37265</guid>
      <dc:creator>Kathirvelkrisha</dc:creator>
      <dc:date>2018-10-30T16:03:02Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451262#M37266</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Sample Image for your reference.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_0.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5668iE573123E1CA01F49/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_0.png" alt="pastedImage_0.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Tue, 30 Oct 2018 16:05:46 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451262#M37266</guid>
      <dc:creator>Kathirvelkrisha</dc:creator>
      <dc:date>2018-10-30T16:05:46Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451263#M37267</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Sample2 Image for your reference,&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_0.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5690i96CA4D4C6D373B3C/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_0.png" alt="pastedImage_0.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 31 Oct 2018 04:14:30 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451263#M37267</guid>
      <dc:creator>Kathirvelkrisha</dc:creator>
      <dc:date>2018-10-31T04:14:30Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451264#M37268</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Can you provide details about the back-end storage and network that is being used?&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 31 Oct 2018 08:04:03 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451264#M37268</guid>
      <dc:creator>RickVerstegen</dc:creator>
      <dc:date>2018-10-31T08:04:03Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451265#M37269</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I have created a separate virtual switch for this&amp;nbsp; VM and directly allocated a physical NIC to that VM. We are using &lt;STRONG&gt;IBM ds3512 ISCSI &lt;/STRONG&gt;Storage.&amp;nbsp; &lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_0.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5697iB48155A02116509C/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_0.png" alt="pastedImage_0.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Physical NIC :-&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5698i3F0638E0FC3DC129/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;VM NIC:-&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5704i5698B544B650E59D/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_4.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5705i67F93787DF7C977E/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_4.png" alt="pastedImage_4.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_5.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5706iDB20B40155EE250A/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_5.png" alt="pastedImage_5.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 31 Oct 2018 09:19:33 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451265#M37269</guid>
      <dc:creator>Kathirvelkrisha</dc:creator>
      <dc:date>2018-10-31T09:19:33Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451266#M37270</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I had that problem on some HPE DL360 G6's because their old BBWC batteries were finished and disabled the smart array acceleration.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;I saw the errors by selecting the Host, Monitor, Events, and got a lot of:&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;"Device naa.... performance has deteriorated. I/O latency increased from average value of ..."&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;After they were repaired with home-made cells, a few hours later they were charged up, and everything was as fast as expected.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 31 Oct 2018 14:35:52 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451266#M37270</guid>
      <dc:creator>Dave_the_Wave</dc:creator>
      <dc:date>2018-10-31T14:35:52Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451267#M37271</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;ESXTOP can help you identify where the problem is occurring.&amp;nbsp; &lt;A href="https://kb.vmware.com/s/article/1008205" title="https://kb.vmware.com/s/article/1008205"&gt;https://kb.vmware.com/s/article/1008205&lt;/A&gt; I've used this many times to help see where the problem is occurring.&amp;nbsp; VM, Host, Storage.&amp;nbsp; I hope this helps.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Wed, 31 Oct 2018 15:13:27 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451267#M37271</guid>
      <dc:creator>flynmooney</dc:creator>
      <dc:date>2018-10-31T15:13:27Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451268#M37272</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I would recommend to look at ESXTOP first to identify where the issue is occuring:&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;A href="http://www.yellow-bricks.com/esxtop/" title="http://www.yellow-bricks.com/esxtop/"&gt;http://www.yellow-bricks.com/esxtop/&lt;/A&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 01 Nov 2018 09:32:41 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451268#M37272</guid>
      <dc:creator>depping</dc:creator>
      <dc:date>2018-11-01T09:32:41Z</dc:date>
    </item>
    <item>
      <title>Re: VM disk Read/Write latency is more then 300ms</title>
      <link>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451269#M37273</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Hi,&lt;STRONG style="font-size: 12.6px; font-family: proxima-nova, Arial, sans-serif; color: #666666;"&gt;&lt;A _jive_internal="true" data-avatarid="-1" data-userid="26489" data-username="depping" href="https://communities.vmware.com/people/depping" name="&amp;amp;amp;lpos=apps_scodevmw : 115" style="padding: 0 3px 0 0; font-weight: inherit; font-style: inherit; font-size: 1.1em; font-family: inherit; color: #3399cc;"&gt;depping&lt;/A&gt;&lt;/STRONG&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;See the output of esxtop.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper" image-alt="pastedImage_9.png"&gt;&lt;img src="https://communities.vmware.com/t5/image/serverpage/image-id/5747iCCEDA5D8BD706975/image-size/large?v=v2&amp;amp;px=999" role="button" title="pastedImage_9.png" alt="pastedImage_9.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Thu, 01 Nov 2018 09:56:28 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/ESXi-Discussions/VM-disk-Read-Write-latency-is-more-then-300ms/m-p/451269#M37273</guid>
      <dc:creator>Kathirvelkrisha</dc:creator>
      <dc:date>2018-11-01T09:56:28Z</dc:date>
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