[squid-users] Re: Extremely Low Request Hit Ratio!

My suspicion is some problem here:

store_dir_select_algorithm least-load

# cache_dir aufs /mnt/cachedrive1 1342177 128 512
cache_dir aufs /mnt/cachedrive2 1426227 128 512
cache_dir aufs /mnt/cachedrive3 1426227 128 512
cache_dir aufs /mnt/cachedrive4 1426227 128 512
cache_dir aufs /mnt/cachedrive5 427008 128 256

Not knowing internal processing within squid in this scenario, but
theoritically there MIGHT be the risk, having the same object cached up to 4
times, because all cache_dir have equal storage properties. Which reduces
overall sum of cachable objects significantly. And MIGHT lead to unnecessary
purge of cached objects, in case a cache_dir almost full.

So I would either use just one large cache_dir (which might then run into
the limit regarding max. number
of cachable objects in one dir 2**24)
or (better solution)
set disjunct limits on the size of cachable objects for the various
cache_dir,
using
cache_dir aufs /mnt/cachedrive2 1426227 128 512 min-size=xxxx max-size=xxxx

And move these lines
 minimum_object_size 16 KB
maximum_object_size 512 MB
on top of this one:
maximum_object_size_in_memory 300 KB

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