nginx + php 5.3.5 fpm result is high server load

Lasse Laursen laursen at
Tue Mar 8 00:47:55 MSK 2011

Hi list

We have a setup with central NFS server (using 64 NFS daemons at the moment) and 10 servers that mounts data via NFS4. The NFS server is using XFS, Linux version 2.6.32-5-amd64 (Debian 2.6.32-30). It's a VM with gigabit interface and it delivers around 50-80 MBit in peak time. It's a quad core machine with 8 Gig of memory.

From time to time the load literally explodes on the NFS server and eventually also on the webservers since they can't access the content on the NFS server.

I found this post via Google and you mentioned that you had a similar problem with PHP include path - care to enlighten what the problem was and how you solved it?

Also - if possible - could I have a look at your sysctl.conf file ?

Kind regards,
Lasse Laursen

On Feb 27, 2011, at 1:47 PM, Matthew Macdonald-Wallace wrote:

> On Sat, 2011-02-26 at 16:52 -0500, izrodix wrote:
>> Hi Guys,
>> we try to migrate our apache 2.2 mod_fcgid with php-cgi configuration 
>> to nginx + php-fpm from ports on our freebsd 8.2 stable system.We hosted
>> round 200-300 sites.
>> The result is high load of the server, lots of system calls and
>> mysql-server 5.1.55 has doubling his threads.
>> Any suggestion ?
> What's the filesystem format underneath? We've seen some issues recently
> with NFS performance if the PHP include path is in the wrong order which
> drove the load up to over 200 on a 24-core server with 16G RAM.
> We also saw some issues with the maximum memory limits set
> in /etc/sysctl.conf which created "false" load in a similar range on the
> same box.
> HTH,
> M.
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