Moodle 1.5.2 & Solaris 10 performance problems

Moodle 1.5.2 & Solaris 10 performance problems

by Gonzalo Enciso -
Number of replies: 1

We were working with moodle 1.4.4 on a Sun Enterprise 250 with 2 proc (400 MHz), 512M RAM and Solaris 9 OS. Everything was working fine....

Recently (3 weeks ago) we moved to a SunFire 6800 server with 2 proc (900 MHZ), 4G RAM and Solaris10 OS. Also we updated from moodle 1.4.4 to moodle 1.5.2

Seems like more hardware would have better performance, but two weeks ago users start to report very slow sessions, and for some time impossible to log in into the system or even going from one page to another o an active session.

"top" command report "mysqld" using 50% of CPU and 90% peaks over 30 minutes, wich makes imposible to use a shell session.

Last weekend we changeg mysql version to 4.0.25 (package from mysql.com), moved from apache 2.0.54 to apache 1.3.33 with php 5.0.4 and updated moodle to 1.5.2 daily built (from august 26th), but mysql still reports heavy CPU usage with very few sessions (20, 10 even less)

My Summary

Sun SF6800 2proc 900 MHz, 4G RAM, Solaris 10

Apache 1.3.33, PHP 5.0.4, MySQL 4.0.25

Moodle 1.5.2 daily built (from Aug 26th)

extra modules: questionnaire, hotpotatoes, books 

Any ideas guys?

I almost forgot my URL    http://eduline.cencar.udg.mx/moodle/

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In reply to Gonzalo Enciso

Re: Moodle 1.5.2 & Solaris 10 performance problems

by James Dugal -
!Hola Gonzalo! I use Solaris 8 on a Sunfire v890 and have no performance problems (so far smile. I use MySQL 4.1.10, Apache 2.0.54 with the Worker MPM, PHP 4.3.11, and TurckMMcache 2.4.6. Also, my Moodle 1.5.2+ shares the machine with Blackboard 5.5.1, and that old Bb system runs old 1.3.26 Apache and MySQL 3.23.32. WHile the Bb system is heavily loaded as we begin a transition to Moodle, it's performance is limited by the mysql daemon, and by the memory available to apache. From this experience I strongly recommend using a threaded Apache. I can't judge PHP 5.x as I haven't tried it (does it work with MMcache?) As to the Mysql load, perhaps mytop would help show what it is doing? Also, you could try running myisamchk on the tables. Something like: myisamchk --silent --force --fast --medium-check -O key_buffer=64M -O sort_buffer=64M $DATADIR/*/*.MYI Buena suerte, amigo! --James
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