Comments on: MySQL, AIX5L and malloc()

By: Erkan

Erkan — Wed, 18 Feb 2009 21:52:41 +0000

Great,

you make me post some experiences with solaris on M4000 and T5220.
To make it short: MySQL performs on Linux on DL 380/285/580/585 much better:-)

By: SAM

SAM — Wed, 18 Feb 2009 21:24:56 +0000

Let me give you a little advice for running mysql on aix5.3(powerCPU)

After a migration from SLES9 (Intel Xeon) to AIX 5.3 (Power6) we run into severe performance problems with MySQL 5.0. (64bit)

MySQL and IBM Support were involved to analyze, optimize and resolve the troubleticket.

After recommendation from IBM we have changed vmo parameters and the ratio between real cpu´s and virtual cpu´s. Mysql supplied many new compiled (Xlc + gcc) mysql 5.0.x versions.

Even though all manufacturer worked together our problems couldn´t be fixed until now.

Maybe there is an incompatibility between Power6 CPUs and Mysql!?!?!?

Hope this helps for your decision.

SAM

By: facundo

facundo — Sun, 09 Nov 2008 18:50:29 +0000

Peter,
i work almost mostly with informix and db2 on aix but i think that this params apply to mysql too (with different results depending the storage engine)

By: peter

peter — Sun, 09 Nov 2008 17:38:55 +0000

Wow. That is interesting to see so many people running MySQL on AIX.

By: facundo

facundo — Sun, 09 Nov 2008 15:26:36 +0000

Piotr,
when you do your performance test in aix you should take care of the parameters (may defer depending the storage engine in use)
– minperm
– maxperm
– maxclient
– lru_file_repage

more on this here: http://stix.id.au/wiki/Tuning_the_AIX_file_caches

facundo.-

By: facundo

facundo — Thu, 06 Nov 2008 00:52:05 +0000

Piotr,
thanks a lot for sharing this with us. Im expecting to use this kind of setups in production some day..

on gcc vs xlC.. my guess is that xlC version of mysql should be fast by far.

another test is Linux on Power6 and mysql vs AIX and mysql.

which version of aix are you using?. any chance to know how are this power6 machine configured?.

Thanks,
Facundo.-

By: Piotr Biel

Piotr Biel — Wed, 05 Nov 2008 18:43:13 +0000

Erkan,

As far as I did not test it well in production, I’d rather use Linux or Solaris. It simply decreases probability of hitting potential, undiscovered bugs. There is also not so much info about MySQL + AIX performance. In case of any problems you’ll spend a lot of time looking for solutions or just workarounds, which might not be acceptable while running MySQL in production environment.

By: Piotr Biel

Piotr Biel — Wed, 05 Nov 2008 18:34:29 +0000

facundo,

I did some performance tests, but I have no representative results. For sure, I’d like to perform wide tests in close future (of course I’ll share my results here).

Regarding to compiler used – MySQL binaries are standard, GCC ones and I used them to tests, but at the same time I compiled it from sources with xlC. I think it will be great idea to check for performance of gcc vs. xlC compiled MySQL..

By: facundo

facundo — Wed, 05 Nov 2008 18:04:10 +0000

hi, i’ve been asking about this setup all around with almost no answer..even in mysqlperformanceblog.com forums..

did you get any performance numbers?. how did this setup perform against intel platform?.

which compiler did you use to compile mysql on aix?

anyone has this kind of info?.

By: Ender

Ender — Tue, 04 Nov 2008 15:38:38 +0000

I’ve used mysql server 4.1 (4.1.17? binary from mysql.com) on 2 servers with AIX 5.3 (master/replica).
It used 64 GB of ram without any problem. There was some problems with configuration (aix/mysql) for best performance.
It worked fine.