[ic] CPU upgrade for IC server?

Steven Jenkins steven at endpoint.com
Wed Jun 17 13:38:11 UTC 2009

Grant wrote:
>>> Does this mean I'm alright on memory?
>>> Mem:   1028780k total,   709692k used,   319088k free,    55036k buffers
>> Looks reasonable to me, assuming that's what it typically looks like and
>> you're not actively swapping as shown by "si"/"so" columns in vmstat.
>> Jon
> I think this is more typical:
> Mem:   1028780k total,   974664k used,    54116k free,   226184k buffers
> Swap:  2008116k total,    31916k used,  1976200k free,   326828k cached
> procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
>  r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
>  1  0  31916  54164 226184 326832    1    1    14     3   23   26 35 11 54  0
> Do the "1" in si and so mean I'm actively swapping?

Technically, yes; however, swapping in 1 page and swapping out 1 page is not 
enough of a pattern to be concerned about.  Notice your cpu columns: the 'wa' 
column is zero, so you're not waiting for IO to occur, yet the 'us' column is 
35, so you're spending quite a bit of time in your application (i.e., the 
'userspace' part of code), yet the overall system is 54% idle.

A suggestion: install and run sar (the 'sysstat' package on a RH system; I 
believe it is 'atsar' on Debian).  That will do data gathering on a regular 
basis so that you can then analyze (and correlate) with problems.

Steven Jenkins
End Point Corporation

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