maria-developers team mailing list archive

[Sergey Vojtovich <svoj@xxxxxxxxxxx>]

Hi Sergei,

On Sat, Mar 01, 2014 at 07:47:07PM +0100, Sergei Golubchik wrote:
> Hi, Sergey!
> 
> On Feb 27, Sergey Vojtovich wrote:
> > At lp:maria/10.0
> > 
> > ------------------------------------------------------------
> > revno: 4011
> > revision-id: svoj@xxxxxxxxxxx-20140227141521-fgj5b0h3qbijyojh
> > parent: svoj@xxxxxxxxxxx-20140220072533-l3au3y7mrsyclfpb
> > committer: Sergey Vojtovich <svoj@xxxxxxxxxxx>
> > branch nick: 10.0
> > timestamp: Thu 2014-02-27 18:15:21 +0400
> > message:
> >   MDEV-5755 - Scalability: let LOCK_open and THR_LOCK::mutex be normal mutexes
> >   
> >   Normal mutexes scale better than adaptive at high thread count.
> >   At low thread count they behave similarly.
> 
> To summarize Axel results:
>  at low concurency normal can be ~1% slower.
>  at high concurrency r/o - normal are up to 25% faster.
>  at high concurrency r/w - normal are up to 10% slower.
> 
> That last result bothers me a litte.
Indeed. I'll check with Axel about it. Thanks for pointing it out!

Thanks,
Sergey