> Why would it be off limits? Is it likely to lose data due to power failure
> etc?
If fsyncs are taking 5X as long, people can't use PostgreSQL on that
platform.
> Are you referring to improvements due to write barrier support getting
> fixed up fr ext4 to run faster but still be safe? I would assume that
> any major patches that increase performance with write barriers
> without being dangerous for your data would get back ported by RH as
> usual.
Hopefully, yes. I wouldn't mind confirmation of this, though; it
wouldn't be the first time RH shipped with known-bad IO performance.
--
-- Josh Berkus
PostgreSQL Experts Inc.
http://www.pgexperts.com
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