Thank you very much for your reply.
After checked system log, I found that there are some errors about disk
sdb.
It seems that one disk is broken(I have 2 disks with Raid1.)
Im wondering maybe my problem is caused by disk error. Tomorrow I will
rebuild the Raid, Ill keep on monitoring
: Ilan B. [mailto:[email protected]]
ʱ: 20101026 22:21
ռ: [email protected]
: Re: : server performance issue
You’re issue is probably not with php-fpm. Without knowing more about
your
architecture, these are key points you should look at:
- What is your PHP code doing? What is it waiting for? Tools: xdebug
(http://www.xdebug.org/) and you could even try tracking it via the
php-fpm
slow log configuration option:
request_slowlog_timeout - The timeout (in seconds) for serving of
single
request after which a php backtrace will be dumped to slow.log file.
Default: “5s”. Note: ‘0s’ means ‘off’
slowlog - The log file for slow requests.
-
How is your database performing? Are there issues with queries?
again,
look at the slow log query output of mysql. Look at connection issues
and
name resolution with mysql (its notoriously bad at host name
resolution). -
If your site is really busy, you may need to add more PHP application
servers to handle the load.
Again, this is not a Nginx or PHP-FPM problem per se.
2010/10/26 Xin L. [email protected]
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
: Phil B. [mailto:[email protected]]
ʱ: 20101026 19:07
ռ: [email protected]
: 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 [email protected] 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 B.
[email protected]
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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