Re: varnish consuming too much memory?

[Jodok Batlogg]

On 13.03.2008, at 10:56, Poul-Henning Kamp wrote:

In message <[EMAIL PROTECTED]>, Jodok Batl

ogg writes:

i'm wondering how varnish determines how much memory it should
consume...

It uses all memory it can for caching.

- is there a way to limit it?

no.

i'd like to assign the 4 varnishes running on this box 3 GB each and
leave 4GB for linux disk/nfs cache

Why are you running multiple varnishes on the same box ?

we're hosting multiple sites on our cluster. the cluster has two load balanced reverse proxies that handle delivery of static content (nginx) and caching (varnish). the different sites are running under different users. i'd like to share the resources "fair" between them. the sites have different rules for content expiry, allowed purge hosts,... some of the static files are beeing delivered from NFS, with netfs we're using linux cache memory to cache the files as well. right now (one) varnish eats up all memory, leaves no memory for caching and the system starts swapping.

- what effect has the size of the VARNISH_STORAGE_SIZE?

That sets the size of the file varnish maps for storage, and in a sort
of way limits the amount of memory varnish can use, but also severely
limits your hit-rate when it runs full.

can you elaborate or point me to some documentation?

is this cache persistent? when are objects moved from memory to disk?

No.

Whenever the kernel VM subsystem decide it should happen.

so it is a kind of home-made swap memory for varnish?

thanks

jodok

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Jodok Batlogg, Lovely Systems GmbH
Schmelzhütterstraße 26a, 6850 Dornbirn, Austria
mobile: +43 676 5683591, phone: +43 5572 908060

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