Re: PHP Performance problem after upgrade to 5.1.6 or 5.2.0

Alexandre Biancalana wrote:

Miroslav Lachman wrote:

Hi all,

I have performance problem with PHP after upgrading from PHP 5.1.4 to newer version regardles if newer version is 5.1.6 or 5.2.0. I tested both with same result.
I have two same servers (IBM x336 with dual Xeon 3GHz and 2GB RAM) serving one webapplication (loadbalancing). Both machines are running FreeBSD 6.0 SMP + Apache 2.0.59. If both machines have PHP 5.1.4, everything is fine and load is about 1.5 (Apache is running 16-20 childs).
After upgrade to PHP 5.1.6 or 5.2.0, performance goes down - average load is about 3-5 with peaks at 12-40 (in this peaks Apache starts to run more childs, sometimes to MaxClients).
Both machines are serving identical content with same requests per second, both versions of PHP are compiled from ports with same options.
Both have in loader.conf:
accf_data_load="YES"
accf_http_load="YES"


First of all you should upgrade the FreeBSD to 6.2-STABLE, since this has a LOT of improvements in the overall system. I would recommend you to disable HT too.

Yes, you are right, this is the last project, where I have 6.0, but I have not spare machine to do some testing with 6.2 for this type of usage. Those two are in production and if I turn off one of them, the second can't survive the load. ;o(
I can't risk that result would be worse than is.
And even if your are right, the problem it self is in PHP version upgrade...

Miroslav Lachman
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