On Mon, Oct 19, 2009 at 5:52 AM, Sergei Golubchik <ser...@pisem.net> wrote: > Hi, Monty! > > 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. 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. -- Mark Callaghan mdcal...@gmail.com _______________________________________________ Mailing list: https://launchpad.net/~maria-developers Post to : maria-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-developers More help : https://help.launchpad.net/ListHelp
