Recommendations for Bugzilla hardware
bugreport at peshkin.net
Wed Oct 19 01:26:53 UTC 2005
Eddie Xie wrote:
>Hi, Kevin. Thanks for your advice, but I think you're
>misunderstanding the situation I'm in. I'm not installing Bugzilla
>for the first time. We already have over 100 users and 50,000 bugs.
>I want to migrate it to a larger system, and I wanted to know where to
>direct our investment.
>If we could get a dual processor machine with each processor being
>faster than the single processor we have now plus much more RAM plus a
>bigger, faster, RAID system, then I know that the new system would be
>faster, but I also know we'd be spending a lot of money that could
>more usefully be spent elsewhere. But where should the money be spent?
>I was trying to figure that out.
We're still benchmarking, but we have found that the CPU load of even
the most intense operations does not make a dent in a dual-core AMD64,
4400 (that's 2200 per core with 1Mbyte/cache per core). There is
essentially no swapping with 1GB of memory. Note, here, that EVERYTHING
(OS, Webserver, Perl, MySQL) is compiled for 64-bit.
The identifiable botlenck is disk IO bandwidth. Using 2 SATA channels
to implement a RAID0 (striping) array, the IO bandwidth is still the
weak link in the chain (though not very weak at all). It seems that
responsiveness is still largely a function of the speed of single big
queries rather than a question of many concurrent operations.
The conclusion I am starting to reach is that the IO bandwidth to your
MySQL databases is the most critical function.
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