[squid-users] Finally I got it works

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I had a big performance problem with my squid. Previously I was running
it on RedHat9 AMD athlon 1800+ some 18 Gbyte of cache and 256 Mbytes of
TOTAL ram.

The squid daemon starts responding to requests very slow after 1 hour I
had started it --- indipendentely from the number of users !. Every
time. I read a loto of guides/tutorial, I checked for bugged
ram/disks/whatever, but I can't solve the problem. I switched to
async-io and aufs, but nothing.

I started thinking the cache was too big (too much Gbytes to index), so
I reduced the size, but nothing.

Finally I worked on assigned RAM. In my default configuration I assigned
64 Mbytes of RAM to cache_mem, thinking that 1/4th of the total RAM was
a conservative approach. I was wrong !
It is true that a big cache dir require more RAM, but also the system
itself requires a lot of RAM, and all guides and tutorial I have read
are too optimistic regarding the RAM squid should use.

I finally reduced the cache dir to 3 Gbytes and RAM to 32 Mbytes ---
Squid never slow down and is from 10 to 100 times faster.

Now squid performances are directly related to the number of users.

- --
Davide Vaghetti
University of Pisa NOC - Centro Serra
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Received on Wed Jan 21 2004 - 04:16:45 MST