Monitor for memory bottleneck on Windows?

[Michael Medin]

I think by usage he did not mean usage but *usage* :)
As in how much the swap area i used (having 8Gb swap which is allocated 
but not used wont matter much).
Where as in a system who is spending time writing/reading from/to the 
swap area performance will degrade considerably.

// Michael Medin


On 2009-07-09 09:37, Tore Lønøy wrote:
>
> This is true for some cases but we have a few servers which are using 
> 75% swap (8GB RAM, 8GB Swap), which are blazing fast even then. So I 
> don´t think swap usage _alone_ is a good indicator, but it can be.
>
> 2009/7/6 Andreas Ericsson <ae at op5.se <mailto:ae at op5.se>>
>
>     Tore Lønøy wrote:
>
>         Hello naguis usergroup!
>
>         I have for some time now tried to find a way to monitor
>         performance
>         bottlenecks related to shortage of memory on Windows, with no
>         luck. As far
>         my knowlegde of memory bottlenecks concern, using NSClient++
>         command
>         CheckMem and argument physical, is far from enough. Also,
>         monitoring windows
>         performance counters, like Memory \ Pages Out/sec is no good
>         either since it
>         doesn't support average results.
>
>         There is alot of documentation on how to determine that memory
>         is a
>         bottleneck, like e.g.: http://support.microsoft.com/kb/555223
>
>         But, for what I understand, using nagios to determine this is
>         hard.
>
>         So how do you guys locate memory bottlenecks on windows
>         machines, with or
>         without the help of nagios?
>
>
>     By checking the swap usage. Basically, when a system starts swapping
>     performance will go downhill very, very fast. The disk is several
>     hundred
>     orders of magnitude slower than the RAM. If you have high swap
>     usage, you
>     should buy more RAM for your servers (or modify whatever programs are
>     running on them).
>
>     -- 
>     Andreas Ericsson                   andreas.ericsson at op5.se
>     <mailto:andreas.ericsson at op5.se>
>     OP5 AB                             www.op5.se <http://www.op5.se>
>     Tel: +46 8-230225                  Fax: +46 8-230231
>
>     Considering the successes of the wars on alcohol, poverty, drugs and
>     terror, I think we should give some serious thought to declaring war
>     on peace.
>
>
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