Re: [squid-users] File not cached in memory?

Heinz Diehl wrote:
> Hi,
>
> given the following settings in squid.conf (2.7-STABLE9):
>
> cache_mem 512 MB
> maximum_object_size_in_memory 10 MB
> memory_replacement_policy heap GDSF
>
> cache_replacement_policy heap LFUDA
> cache_dir coss /var/cache/squid/cs 10240 max-size=131072 block-size=4096 maxfullbufs=10
> cache_dir aufs /var/cache/squid/A 20000 64 256 min-size=131073
>
> minimum_object_size 0 KB
> maximum_object_size 200 MB
>
> When someone downloads e.g. "patch-2.6.35-git10.bz2" with a size of ca. 6.4 MB,
> I see a SWAPOUT for this file in the logs, and the next one downloading
> this file is served directly and entirely from the cache (disk), I see a
> TCP_HIT in the logs. So far, so good.
>
> My question is: why is that file not getting cached in memory? The
> maximum_object_size_in_memory is 10 MB and big enough.
>
> For testing purposes, I set up a squid proxy with cache_dir "null", the
> log files show RELEASE for the mentioned kernel patchfile directly after
> downloading, and it is never cached in memory either...
>
> What am I missing here?

Did the object arrive with known content-size header?
In the absence of a known content size that can be used to determine its
best caching position Squid will be conservative and assume it's going
to be a huge ISO or DVD sized thing. Causing a disk save.

Amos

-- 
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   Current Stable Squid 2.7.STABLE9 or 3.1.6
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