Hi, MARK!
On Oct 19, MARK CALLAGHAN wrote:
> On Mon, Oct 19, 2009 at 5:52 AM, Sergei Golubchik <ser...@pisem.net> wrote:
> > On Oct 19, Michael Widenius wrote:
> >>
> >> I just finished applying / modifying / rewriting the userstats
> >> patch to MariaDB 5.2 and will commit this in a moment.
> >
> > I wonder if anybody cares to monitor mutex usage in MySQL.
> >
> > This patch adds few new global mutexes that are locked at least once
> > per statement (or more).
> >
> > Without benchmark results one can only speculate whether it will
> > affect users or not.
>
> I am willing to bet that Monty's patch makes sysbench readonly much
> slower with high concurrency on an 8-core server. But those problems
> have been fixed in recent versions of the patch.
Yes, you replied that to Monty. Let's see what he has to say.
> Is MySQL or MariaDB going to run and publish performance regression
> results for each release/feature? I would love for that to happen, but
> then I will have less to write about.
I'd love it to happen too, but I don't feel very optimistic about it :(
Regards / Mit vielen Grüßen,
Sergei
--
__ ___ ___ ____ __
/ |/ /_ __/ __/ __ \/ / Sergei Golubchik <s...@sun.com>
/ /|_/ / // /\ \/ /_/ / /__ Principal Software Engineer/Server Architect
/_/ /_/\_, /___/\___\_\___/ Sun Microsystems GmbH, HRB München 161028
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