Hi Tony, Thanks for the response.
I probably didn't ask the question(s) very well. I'm working with a customer
that has no capacity plan regarding the use of z/VM as a linux host. We're
seeing both CPU and Memory usage on the z/VM side increasing. Performance on
the linux guests is acceptable at this time.
Aside from waiting for the linux users to start complaining - what metrics and
thresholds should I be tracking as early predictors of capacity problems?
Obviously if CPU usage is constantly 100% that's probably not good. I'm
currently watching CPU, IOWait and Stolen time but wonder if those are
sufficient. Any suggestion as what a good maximum number is?
Memory is a larger concern - In a previous life as a mvs sysprog I would watch
paging/swapping and delay times among others. Are there any rules of thumb
regarding paging or swapping in z/VM? Is there something better that
paging/swapping for capacity prediction?
Thanks again,
Nick
----------------------------------------
> Date: Wed, 2 Mar 2011 13:47:42 -0800
> From: generalemailli...@yahoo.com.au
> Subject: Re: Capacity Monitoring question
> To: IBMVM@LISTSERV.UARK.EDU
>
> We use Performance Toolkit with APPLDATA enabled, then from option 29 in Perf
> toolkit we get
>
> Linux screens selection
> S Display Description
> . LINUX RMF PM system selection menu
> . LXCPU Summary CPU activity display
> . LXMEM Summary memory util. & activity display
> . LXNETWRK Summary network activity display
>
> Interval 02:11:28-08:44:10, on 2011/03/03 (CURRENT interval, select interim
> or
> average data)
> ______ . . . . . . . . . .
> . . . . . .
>
> <------------------- Total CPU --------------------------->
> <------------- Processes -------------->
> Linux Virt <---------------- Utilization (%) ------------------------>
> <----
> Current -----> <-Average Running-> Nr of
> Userid CPUs TotCPU User Kernel Nice IRQ SoftIRQ IOWait Idle Stolen
> Runabl
> Waiting Total 1_Min 5_Min 15_Min Users
> >System< 2.0 4.4 2.3 1.9 .0 .0 .1 .9 193.2 1.6
> >2.0 .0 434.5 .08 .15 .12 4
> DLVOMG01 2 .4 .2 .2 .0 .0 .0 .2 198.8 .6
> 2 0 215 .00 .00 .00
>
> Interval 02:11:28-08:44:10, on 2011/03/03 (CURRENT interval, select interim
> or
> average data)
> ______ . . . . . . . . .
> . . . . . . .
>
> <------------ Memory Allocation (MB) -------------> <-------
> Swapping
> -------> <--- Pages/s ---> <-BlockIO->
> Linux <--- Main ---> <--- High ---> Buffers Cache <-Space (MB)->
> <-Pgs/sec-> Allo <-Faults--> <--kB/sec-> Nr of
> Userid M_Total %MUsed H_Total %HUsed Shared /CaFree Used S_Total %SUsed
> In Out cates Major Minor Read Write Users
> >System< 3516 98.2 .0 .0 .0 240.7 1855 1744 .1
> >.000 .000 331.1 .000 916.1 43.57 37.53 4
> DLVOMG01 2007 98.1 .0 .0 .0 225.7 1495 256.0 .0
> .000 .000 103.1 .000 229.5 55.16 18.51
>
> Regards,
> Tony
>
>
>
> ----- Original Message ----
> From: Nick Warren
> To: IBMVM@LISTSERV.UARK.EDU
> Sent: Thu, 3 March, 2011 7:24:09 AM
> Subject: Re: Capacity Monitoring question
>
> Sorry, Didn't know protocol.
>
> Nick Warren - freelance consultant. New to z/VM - experience with AIX, HPUX,
> MVS, Windows.
> ________________________________
> > Date: Wed, 2 Mar 2011 20:43:35 +0000
> > From: scott.rohl...@gmail.com
> > Subject: Re: Capacity Monitoring question
> > To: IBMVM@LISTSERV.UARK.EDU
> >
> > If you want help - you're gonna have to introduce yourself...
> >
> > Scott Rohling
> >
> > On Mar 2, 2011 12:22pm, new zvm wrote:
> > > I'm relative new to z/VM. I have a couple of z/VM LPARs runing Linux
> > guests and have more coming.
> > >
> > >
> > >
> > > What I'm wondering is this:
> > >
> > >
> > >
> > > What z/VM metrics are you monitoring and what thresholds do you use
> > as indicators that more capacity is needed - Specifically CPU and
> > Memory.
> > >
> > >
> > >
> > > Thanks in advance
> > >
> > >
> > >
> > > New 2 zVM
> > >
> > >
> > >
> > >
> > >
> > >
>
>
>
