Even I set the pm.max_children=50, I still got lots of errors…...



Oct 26 22:09:36.354159 [WARNING] [pool www] seems busy (you may need to
increase start_servers, or min/max_spare_servers), spawning 8 children,
there are 0 idle, and 12 total children

Oct 26 22:09:37.354215 [WARNING] [pool www] seems busy (you may need to
increase start_servers, or min/max_spare_servers), spawning 16 children,
there are 0 idle, and 17 total children

Oct 26 22:11:20.650232 [WARNING] [pool www] seems busy (you may need to
increase start_servers, or min/max_spare_servers), spawning 8 children,
there are 1 idle, and 17 total children

Oct 26 22:11:41.246244 [WARNING] [pool www] seems busy (you may need to
increase start_servers, or min/max_spare_servers), spawning 16 children,
there are 0 idle, and 21 total children







发件人: Phil Bayfield [mailto:phil@techlightenment.com]
发送时间: 2010年10月26日 19:07
收件人: nginx@nginx.org
主题: Re: server performance issue



Your formulas look interesting, will give them a try next time I'm doing
some optimising.

Normally I would just make a rough guess based off req/sec, execution times
etc and fine tune with ab.



On 26 October 2010 11:58, SplitIce <mat999@gmail.com> wrote:

ive found that if you have no blocking functions in php, aka its CPU bound
then number of CPU cores+1 is the most efficient. If it has mysql (most
likely does) and other IO bound operations then *2 or *3 is fine. values
between 20-30 are common in decent scale web servers, in fact on my i7 8gb
ram I run 20, on my amd x2 4gb ram I run 15.

On Tue, Oct 26, 2010 at 9:52 PM, Phil Bayfield <phil@techlightenment.com>
wrote:

Sorry didn't read you config before posting, you already have this. :)



You probably need to reduce the number of child processes, more is not
better.



On intensive PHP applications I've found lower is better.



For example, if you have 100 concurrent connections, this doesn't mean you
necessarily need 100 PHP-FPM children.





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