performance optimization php - openx

[dhamma]

any experience with optimizing openx AdServer 2.8.2?
Since upgrading to the newest version the response rate went down....

Besides opcode-caching (APC) I´ve tried memcache as AdDelivery Cache rather than filesystem....

What followed was another increase(!) in response time (memcached is on a different machine though!)

Would be thankful for any tips - also general php tuning advice...
(it´s a high performance system)

thx

 

[SpamHat]

If you're using mysql look at stored procedures and gzipping the responce.

 

[dhamma]

thanks - I´m using stored procedures already...
gzipping sounds interesting
do you mean gzcompress(); ??

 

[7figures]

Do you know where the bottleneck is? Done any profiling? DB, PHP, media serving?

 

[dhamma]

no profiling yet - i found it weird that php4 and version 2.6 openx was almost twice as fast as php 5.2.10 + openx 2.8 (response time that is) when it should just be the opposite

profiling will be the next step.

 

[SpamHat]

thanks - I´m using stored procedures already...
gzipping sounds interesting
do you mean gzcompress(); ??

Yep, but probably better to do it with mod_deflate.

 

[dhamma]

yeah right - mod_deflate is always good advice
thanks for mentioning.. i´ll have a look at the configuration

 

[dhamma]