PHP with open_basedir performance problem

[Hugo Silva]

Miroslav Lachman wrote:
> Hi all,
>
> I found a painful performance problem with Apache + PHP 5 when
> open_basedir directive is enabled.
> Application performance drops by more than 50% with open_basedir enabled.
> There is also significant disproportion between usr / sys CPU load. (sys
> is much higher than usr)
> I do not know if this is problem on FreeBSD side or in PHP code itself.
> This problem exists on FreeBSD 6 and 7 (maybe older versions too - I did
> not check).
> I tested both shedulers on FreeBSD 7, no big difference (application
> performance is little better with 4BSD).
> Is there anyone with enough knowledge and time to look at it?
>
> This problem affects Mac OS X as well, but does not seem to appear on 
> Linux.
> http://lists.apple.com/archives/macos-x-server/2006/Nov/msg00623.html

I too have seen this, sys% is so MUCH higher and jumps from about 30% to 
70% and higher all the time. In my case it's like 3% user time, 30-70% 
system time. I will try disabling open_basedir on one of the webservers 
and report back.

Best regards,

Hugo