Chris Bainbridge wrote:
> I'm curious what the problem is with bugzilla and it's db
> interactions? You're suggesting a specific issue rather than general
> db performance issues like fs, io scheduling, raid1, hyperthreads,
> etc.?

	It's most likely related to Bugzilla using MyISAM tables by default 
which is fine in a small environment. However as concurrency grows along 
with table size those full table locks begin to cause issues. 
Additionally most www-apps are not known for their well thought out db 
schema. Performance of the underlying hardware plays a part, but can be 
overshadowed pretty quickly by query and table inefficiencies.

	The usual fix without touching the internals of the software is doing 
master/slave replication and allowing the selects to happen on the slave 
and writes on the master. However you would need to change most of the 
queries to point to the slave server which is usually not trivial. It 
sounds like this is the path the Infra team is pursuing.

kashani
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