Mailserver mem usage (OT)

[Jørgen Giversen]

>
>> The old system had about 600 mb ram when i looked at "top" it always
>> showed that it used all the mem available. The new system however shows
>> that it uses about 300 mb with about 700 mb free. Can anybody tell my
>> why it is not using all the mem that's available?
>>
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> One can think of several reasons:-).
> On the "old" system, you probably had most of your memory "tied" to
> filesystem caching etc, that is to say in "readily returnable
> state"... So if the kernel policy for how much of the memory is
> used/allowed for such differ, you will see a marked difference there.
> Also, this caching can take some time to "build up" so if the system
> hasn't been running for more than a (rather) short while, it might not
> have had time to amass any significant use (if you use slocate or
> similar, thoat/those cron-jobs usually "fill this up" eventually:-).
>
> Unless you see some (real) performance issues, this shouldn't be
> anything to worry that much about.
>   
Ok thanks I was just wondering if I some how could use some of the mem 
for squid when no other service seems to want to use it. It has been 
running now for 3 days with quite good performance.
Regards jg

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