--- Henrik Nordstrom wrote: >
On Sun, 11 Apr 2004, Mark Tinka wrote:
>
> > what happenned was that my /swap was on and

> running, but my system never
> > ever did swap, even when the load increased..

> physical RAM utilisation
> > went from 1.3GB to as low as 2MB.. whenever RAM

> hit 2MB, it shot up to
> > 3MB, and this cycle continued until either Squid

> did its internal
> > sanities, or i restarted the Squid process, at

> which point memory was
> > freed up to about 24MB.. and then continued to

> fall till 2MB, where it
> > rose back again to 3MB, and this went on and on

> and on and on...
>
> Then your sustem never reached the point that there
> was memory pressure,
> i.e. you had significantly more than sufficient
> amount of memory.


i see...

>
> > i would like to achieve this, but the difference

> is that i will be
> > running on a 2.4 kernel, and not a 2.2, as is the

> previous Squid server,
> > so am not sure how good my chances are.. ..

>
> Test it.


definitely...

>
> > is there a clear explanation as to why this

> is..?..
>
> It is hard to give clear explanations on VM
> behaviour. It is a complex
> business with very many variables.
>
> But what can be said is that it is good to reserve a
> significant chunk of
> memory for the OS maintenance of filesystems buffers
> etc.. The Squid rule
> of thumb generalises this a bit and gives the same
> amount as the actual
> Squid usage to OS and buffers (ca twice the memory
> than used by the Squid
> process). For most Squid setups this balances well
> allowing most VM
> implementations to do it's job without disturbing
> Squid much..


okay..

thanks Henrik.. will advise u and the rest of the list
once i have the new box up and running..

>
>
> Regards
> Henrik
>


Regards,

Mark.





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