Demand: Disk latency average VM for VMS powered

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• ESXi 5.1 SMV degrade slowly with until this only unusable disk latency issues. How do I troubleshoot and resolve?

  Dell R710 servers

  Reference Dell Perc 6 / i raid controllers

  3 500 GB hard disks in a raid 5 configuration

  2 data stores.

  3 Red Hat linux 5.5 VMS servers.  Database intensive applications with e/s running high.

  Symptom: Servers become very slow or does not respond over time. Each VM restarts does not help. A restart of the entire server ESXi provides immediate relief and the process begins again. I can only run the servers about a week before I have to restart again.

  Disk latency may average in the range of 100 to 300 before a restart. After the reboot, the latency average in the range of 5 to 9 and slowly grows as the days pass.

  Use memory and CPU look normal to me. Uniformly flat even when the servers seem to have trouble.

  Any ideas what would cause this or how to fix?

  Please go to esxtop on the server and press D to see the latency of disk.

  FollowESXTOP - yellow bricks

  to troubleshoot latency.

• read/write latency average lun 24 hours a day

  How can I get medium and playback latency of writing for each LUN via PS?  I know how to get the latest version, but does not know how to get a 24 hours on average.  If it's important storage we use iSCSI is shared between three servers essentials ESXi with vCenter running in a virtual machine.

  Thank you...

  Can of course.

  First let's look at the available historical intervals

  Get-StatInterval | select Samplingperiodsecs, name,  storagetimesecs
  

  This will show

    SamplingPeriodSecs Name                                                                                StorageTimeSecs
    ------------------ ----                                                                                ---------------
                   300 Past Day                                                                                86400
                  1800 Past Week                                                                                604800
                  7200 Past Month                                                                                2592000
                 86400 Past Year                                                                                31536000
  

  To only watch the first 2 columns, do you see the historical intervals 1-4

  In minutes/days, what gives

  Historical Interval 1    5 minutes
  Historical Interval 2    30 minutes
  Historical Interval 3    120 minutes
  Historical Interval 4    1 day
  

  In addition to the name in the second column, the third column shows how much time you will have access to statistical data of this interval.

  For example, interval of 1 history with the 5 minute interval is kept for 1 night.

  If we get statistics of 1 day ago, we will liquidate history interval 2, with the interval of 30 minutes.

  Let's get some stats

  $esxName = 
  # Sample instance
  $tgtInstance = "naa.600507680180809ed000000000000179"
  
  $stats = Get-Stat -Entity (Get-VMHost $esxName) `
            -Stat "disk.deviceReadLatency.average" `
            -Start (Get-Date).AddDays(-2) `
            -Finish (Get-Date).AddDays(-1) | `
            where{$_.instance -eq $tgtInstance}
  

  As see you in the settings - Start and - finishing we call statistics data between 48 and 24 hours.

  All sampling intervals will be 30 minutes (interval 2 historical).

  To get the average day you can do

  $dayAvg = ($stats | Measure-Object -Average -Property Value).Average
  

  Now suppose we recover more than 1 day of data and we want that day averages, you could do that

  $esxName = 
  # Sample instance
  $tgtInstance = "naa.600507680180809ed000000000000179"
  
  $stats = Get-Stat -Entity (Get-VMHost $esxName) `
            -Stat "disk.deviceReadLatency.average" `
            -Start (Get-Date).AddDays(-5) `
            -Finish (Get-Date).AddDays(-1) | `
            where{$_.instance -eq $tgtInstance}
  $dayStats = $stats | Group-Object -Property {$_.Timestamp.Day}
  $dayStats | %{
       $dayAvg = ($_.Group | Measure-Object -Average -Property Value).Average
       Write-Host "Day" $_.Name $dayAvg
  }
  

  What about what you are looking for?

• Fixed, it's a bug of 6.0 x - a: PowerCLI, vSphere 6.0 bug?  Lack of 'disk.used.latest' StatType for interval 7200

  I currently have a ticket open for this with the help of VMware and they keep giving me the runaround on this so I'm hoping to enlist members of this community to determine if it is a bug or not.

  We were on a Windows installation of vCenter Server 5.5 U2e with ESXi hosts 5.5U2 and it worked very well.  We have improved our vCenter first to 6.0.0a 6.0.0b, then 6.0U1, where we are now.  Releases vCenter relevant versions are here, not the ESXi host installs.  It broke somewhere in this upgrade path vCenter and I don't know what broke it version.

  
  

  There are four intervals (in seconds) performance stat data is collected and carried over from table to table: 300, 1800, 7200, 86400.  I won't go into how they are rolled in the other or the static logging levels that we believe that the data in the tables is actually unrelated to the bug at hand.  Interior PowerCLI, yUO can see each of the StatTypes for each interval by running the following commands:

  
  

  Get-StatType-interval 300 - entity < name of VM > | Sorting

  Get-StatType-interval 1800 - entity < name of VM > | Sorting

  Get-StatType-interval 7200 - entity < name of VM > | Sorting

  Get-StatType-interval 86400 - entity < name of VM > | Sorting

  where < name of VM > is of course the name of any virtual computer in your vCenter.  This will display something like:

  CPU. Ready.Summation

  CPU.usage.Average

  CPU.usagemhz.Average

  disk.maxTotalLatency.latest

  Disk.provisioned.latest

  Disk.unshared.latest

  Disk.usage.Average

  Disk.used.latest

  ...

  Each of them is a type of stat for which the data are collected.  If you compare the output of all 4 commands above, you should notice that the type of stat 'disk.used.latest' is not listed in the output of the command of 7200.  He just disappeared.

  
  

  You can see the actual data for each of these types of stat by running the following command:

  Get-Stat - entity < virtual machine name > - < StatType > - IntervalSecs < interval in seconds > Stat

  The question, and what we believe to be a bug, it's that 'disk.used.latest ' is now lack of 7200 as mentioned above.  If I execute the following commands:

  Get-Stat - entity < virtual machine name > - Stat disk.used.latest - IntervalSecs 300

  Get-Stat - entity < virtual machine name > - Stat disk.used.latest IntervalSecs - 1800

  Get-Stat - entity < virtual machine name > - Stat disk.used.latest IntervalSecs - 7200

  Get-Stat - entity < virtual machine name > - Stat disk.used.latest IntervalSecs - 86400

  the 300, 1800 and 86400 intervals of output data for 'disk.used.latest' very well.  However, the interval of 7200 kicks on the following error message:

  "Get-Stat: 2016/06/08 10:20:24 get Stat metric meter"disk.used.latest"there is no entity.

  The problem is that, because this parameter is absent in 7200, stats for what he cannot ride in the meantime 86400.  Currently, the latest data I have for disk.used.latest to 86400 is 11/07/2015, which is when we went to 6.0.0a.  The oldest 86400 data 09/06/15.  This is because the 7200 failed to roll up these data in 86400 since we went, but still data are still purged old daily for one year.  11/07/2016, all my data to 'disk.used.latest' to 86400 will be gone.

  VMware support continues to go off on a tangent associated to how he rolls up data, concealing the fact that the interval of 7200 is not completely collected this metric disk.used.latest because there are simply not and so there is nothing to roll up to 86400.

  Then...  I could use help me proof right or wrong on this.  I don't have access to a vCenter 6.0U1, where it is broken.  What I would like is for one person or several people, to execute commands in a PowerCLI session on the following versions of vCenter, 6.0 below GA, 6.0.0a, 6.0.0b, 6.0U1, 6.0U1b, 6.0U2

  Get-StatType-interval 300 - entity < name of VM > | Sorting

  Get-StatType-interval 1800 - entity < name of VM > | Sorting

  Get-StatType-interval 7200 - entity < name of VM > | Sorting

  Get-StatType-interval 86400 - entity < name of VM > | Sorting

  And simply check if 'disk.used.latest' is in the list of types of stat for all intervals.  If I'm right and this is a bug, it should be absent for the interval of 7200 RPM, depending on the version of vCenter.  This check on each version 6.0 vCenter should tell us on which version it broke and if future versions have set.  It would probably be useful if the vCenter has been upgraded from a previous version of 5.x, don't know if this question will be present again. And I don't know if VCSA would show this problem or not.

  
  

  Post here your findings if you're too missing the type stat "disk.used.latest" in one of the intervals or if you present in all intervals, and which version/version of vCenter number you checked against the.

  
  

  Thanks in advance!
  

  I now put my finger on the exact bug in vCenter that is causing this problem and it seems to affect every installation 6. 0 b through 6.0U2 (I didn't test RTM 6.0 or 6. 0).  V5.5U2 vCenter databases, the VPX_STAT_COUNTER table has the following indexes:

  IX_VPX_SC_ENTITY_ID

  VPX_STAT_COUNTER_M1

  VPX_STAT_COUNTER_M2

  VPX_STAT_COUNTER_P1

  VPX_STAT_COUNTER_U1

  After the upgrade to 6. 0b by 6.0U2, or even a whole new 6.0U2 install (i.e. no upgrade), the VPX_STAT_COUNTER table has only two clues:

  PK_VPX_STAT_COUNTER

  VPX_STAT_COUNTER_P1

  The problem is that the stats_rollup2_proc stored procedure (the task of SQL Agent ' past week cumulative stats "called l_stats_rollup2_proc which then calls stats_rollup2_proc) contains a reference to one of these missing indexes:

  SET @sqlCommand_rt3 = 'INSERT INTO' +... + ' VPX_STAT_COUNTER SC WITH (INDEX(VPX_STAT_COUNTER_M1)...

  This causes the SELECT within this INSERT statement execution to return:

  MSG 308, level 16, State 1, line 1

  "VPX_STAT_COUNTER_M1" of the indexes on the table 'VPX_STAT_COUNTER' (specified in the FROM clause) does not exist.

  The effect of this is that the select in the INSERT statement from @sqlCommand_rt3, who is supposed to read VPX_STAT_DEF. ROLLUP_TYPE = 3 meters of tables HIST2, returns 0 rows due to the error above, which means VPX_STAT_DEF. ROLLUP_TYPE = 3 "counters of HIST2 paintings are wound never in the tables of HIST3 because @sqlCommand_rt3 is not select all data.  For worse, management errors in this stored procedure are not to catch this error, or at least not related it to the SQL Agent history shows this task such as running successfully when it is clearly not.

  The answer that seems to be implying to VMware support is that the index VPX_STAT_COUNTER wrong lack 6.0 installed and that it should be there.  Or these indices have been removed on purpose and someone forgot to update the procedures stored to use one of the remaining index (my test indicates that change the stored procedure to use VPX_STAT_COUNTER_P1 instead can also solve the problem).  Whatever it is, according to my tests, this affects every 6.0 installation vCenter, upgrade or new installation is not serious.  Most people notice probably the question most .latest counters do not appear to be exposed through graphical interfaces.  Unless you are specifically looking for counters .latest in the meantime 7200 using PowerCLI, or a third-party program that looks for them, as I did, you'll probably notice even missing these performance data of the 7200 range and beyond.

  The solution is simple: rebuild the missing index on the VPX_STAT_COUNTER table and counters .latest then roll up to 7200/HIST3 properly again the next time the task runs.  By default, weekly and monthly tasks run at 2:15 a wait for day 2 to see .latest counters appear for the interval of 86400/HIST4.

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  I checked this thread

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  Can someone please help?

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  I created all the variables that I'm providing in the command.

  Kind regards

  P

  You might start by checking what statistical level, the period you specified is defined in vCenter.

  "Latency" needs to at least level 2 metrics.

  I guess that "USB-SSAPP" is the name of a host ESX (i)?

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