Re: 答复: server performance issue

[Jérôme Loyet]

2010/10/26 Xin Liu <liuxin84 at gmail.com>:
> Even I set the pm.max_children=50, I still got lots of errors......
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> 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

switch to static process management, dynamic "pm" is a great feature
to share ressources between several sites hosted on one server. If you
have only one site on your server, you should use static PM.

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> 发件人: Phil Bayfield [mailto:phil at techlightenment.com]
> 发送时间: 2010年10月26日 19:07
> 收件人: nginx at 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.
>
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>
> On 26 October 2010 11:58, SplitIce <mat999 at 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 at 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.
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> On intensive PHP applications I've found lower is better.
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> For example, if you have 100 concurrent connections, this doesn't mean
> you necessarily need 100 PHP-FPM children.
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