PHP with open_basedir performance problem

[Hugo Silva]

Hugo Silva wrote:
> 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
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 From 30-70% to 3%. What a difference!

Hugo