ESXi

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  • 1.  ESXtop & Idle

    Posted Oct 13, 2017 10:47 AM

    Hi all,

    A little question... we have an production ESXi host, 48 vCPU's (with HT), it has currently 9 VM's running. And I see continuously idle at 4800% (48 CPU * 100 = 4800)/
    What does this say as the %RDY is also 4800..

    Should I do something with this ?



  • 2.  RE: ESXtop & Idle

    Posted Oct 13, 2017 02:09 PM

    Hi!


    Can you post a screenshot with esxtop output?

    It seems that your host does nothing :smileyhappy:



  • 3.  RE: ESXtop & Idle

    Posted Oct 13, 2017 07:22 PM

    Well, that is not entirely True :smileyhappy:

    there are 7 rds systems running with each 6 cpu & 24gb of memory running and they are populateD with 30 users each...will post a picture later!

    memory consumption of these hosts are within the os  About 98% (Yes, that is not okay :smileyhappy: )



  • 4.  RE: ESXtop & Idle

    Posted Oct 13, 2017 07:23 PM

    strange thing is, the 4800% is continously throughout the day (idle)



  • 5.  RE: ESXtop & Idle

    Posted Oct 13, 2017 08:30 PM

    Screenshot from esxtop will help a lot to undestand the situation )



  • 6.  RE: ESXtop & Idle

    Posted Oct 13, 2017 09:15 PM



  • 7.  RE: ESXtop & Idle

    Posted Oct 13, 2017 09:26 PM

    Thanks for the screenshot.

    I don't see any problem here. Host is really doing nothing on CPU. All parameters are fine.

    When you write about 4800% IDLE time, where do you see this?



  • 8.  RE: ESXtop & Idle

    Posted Oct 14, 2017 03:26 PM

    Third from below.... it is not really the issue for the vm's... it is more the host doing 4800% ready...

    But can cause That issues? If i look in my home lab I don't see any of these numbers in that degree



  • 9.  RE: ESXtop & Idle

    Posted Oct 14, 2017 04:10 PM

    to be clear, it looks the hosts does nothing but the percentage doing nothing may cause performance slowdown of the vm's due to the %RDY/%RUN... or isn't it?



  • 10.  RE: ESXtop & Idle

    Posted Oct 16, 2017 11:38 AM

    You are looking on 'idle' process. That's something you don't need to look at 99,9% of time.

    You need to look on %RDY, %WAIT and etc for virtual machines processes to understand if they are ok or not regarding their CPU resources.



  • 11.  RE: ESXtop & Idle

    Posted Oct 23, 2017 10:37 AM

    Thanks... the thing I was afraid off, was the way that because the host really isn't doing anything maybe that would/could affect the hosts on it... i.e. I buy a trailer for my car, and have it empty continously, when driving 130 km/hour, with a lot of wind, the trailer is very unstable, fully loaded it goes much better... that was my "feeling", CPU/mem load very low (but ~ 10 ) vm's running, but due to oversized hosts, maybe impacting the performance of the VM's due to the high idle times...

    but, thanks :smileyhappy: