-----Original Message----- From: maria-developers- bounces+wlad=montyprogram.com@lists.launchpad.net [mailto:maria- developers-bounces+wlad=montyprogram.com@lists.launchpad.net] On Behalf Of Axel Schwenke Sent: Dienstag, 19. März 2013 15:45 To: Michael Widenius; maria-developers@lists.launchpad.net Subject: [Maria-developers] Benchmark of connect performance
Hi,
in the light of http://yoshinorimatsunobu.blogspot.fi/2012/12/non-persistent-connection- performance.html <skip> The results don't match Yoshis otherwise. See yourself.
Historical remark on this, the patch for MDEV-3945, http://lists.askmonty.org/pipermail/commits/2012-December/003976.html ) was something that I did to reduce contention of the LOCK_thread_count in this benchmark. This patch was inspired by the said Yoshi's blog entry - he names holding lock during THD destructor (including freeing memory) as one of contention sources, and this was easy to fix. This patch made into 5.5.29 and I think could make big difference to prior versions (70%, or something in that range, I do not recall exact number I measured) - it could be interesting to compare to older version and see how much did it bring.