[THIN] Re: How many users will go on my server
- From: "Braebaum, Neil" <Neil.Braebaum@xxxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Mon, 23 Feb 2004 16:39:20 -0000
> -----Original Message-----
> From: Bernd Harzog [mailto:Bernd.Harzog@xxxxxxxxxxx]
> Sent: 23 February 2004 13:36
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: How many users will go on my server
>
< snip >
> Finally, with respect to how you know when a server is at
> capacity, let = me issue one other cautionary note. You
> (IMHO) cannot tell when a server = is at capacity by looking
> at any utilization metrics (like CPU %). The = reason for
> this is that (again IMHO) you cannot model degradation in =
> responsiveness to users from utilization metrics. You can
> have a fully = responsive server with a CPU utilization of
> 100%,
I've never seen / used one ;-)
But seriously - I've never found anything remotely usable, or
responsive, when 100% CPU activity is reported.
> and one that is = totally unusable with a CPU
> utilization of 20%.
Something else would have to be wrong, though - else being short of some
other resource, would have an impact on the CPU.
Neil
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