recommendation for swap space?

[Pablo García]

Sacha, try to modify the /proc/sys/vm/swappiness it's on 60 (default),
I reduce it to 20 or even 0, on my oracle cluster, to prevent
important process from being swapped.

Regards, Pablo

On Tue, Apr 8, 2008 at 5:51 AM, Sascha Ottolski <ottolski at web.de> wrote:
> Am Montag 07 April 2008 18:00:14 schrieb Dag-Erling Smørgrav:
>
> > Sascha Ottolski <ottolski at web.de> writes:
>  > > now that my varnish processes start to reach the RAM size, I'm
>  > > wondering what a dimension of swap would be wise? I currently have
>  > > about 30 GB swap space for 32 GB RAM, but am wondering if it could
>  > > even make sense to have no swap at all? My cache file is 517 GB in
>  > > size.
>  >
>  > Varnish does not use swap.
>  >
>  > DES
>
>  hmm, then I'm wondering why my machines do swap quite a bit. It's a
>  almost naked linux, the only processes really doing some work are
>  varnishd and varnishlog.
>
>  I have 32 GB of RAM, 30 GB of swap, and 517 GB of cache file. according
>  to "top", varnishd has a resident size of 25 GB, and almost 1,5 GB of
>  swap is in use. kswapd often shows up in "top".
>
>
>  # free
>              total       used       free     shared    buffers     cached
>  Mem:      32969244   32874908      94336          0     108648   29129752
>  -/+ buffers/cache:    3636508   29332736
>  Swap:     29045480    1473200   27572280
>
>
>  it's not worrying me, performance is brilliant, I'm just curious :-)
>
>
>  Thanks, Sascha
>
>
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