Sturgis, Grant wrote:
> I recently moved our squid installation from SuSE 8 to RHEL ES 3 and the
> performance has decreased significantly.
> I attempted to keep the configuration largely the same, and the hardware
> is 100% the same
> The performance with SuSE:
> peak median response time = .250 s
> peak requests per minute = 930
> Now on RHEL ES 3:
> peak median response time > .800 s
> same numbers of requests per minute
> One thing that I know is different is the file system of the cache_dirs.
> They are now ext3 while before they were reiserfs, store io type is aufs.
> I did not attempt to preserve the cache_dirs so the cache before was 2 x
> 45 GB while the cache now has grown to only 2 x 3,259 MB (online about 2
> weeks now).
With Squid, reiserFS gives better performance than ext3. Also, with your
cache rebuilding from scratch, you probably have more cache misses than
before. These two together probably account for most (if not all) of the
increased service time you are seeing.
Adam
Received on Wed Jul 14 2004 - 08:21:45 MDT
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