Re: Optimal configuration to eliminate "out of file descriptors" error - Mailing list pgsql-general

I have not received a response yet on this. Should I try another
postgres list or do I need to provide more information/clarity? Thanks.


On Apr 14, 2004, at 12:48 PM, Joe Lester wrote:


<excerpt>I'm trying to figure out what the optimal Postgres
configuration would be for my server (with 200 connecting clients,
even though I'd really like to get it up to 500).


I've got a 700 MHz eMac running Mac OS 10.3.2 (Panther) with 512 MB of
RAM. I've messed around with some settings but I'm still getting an
occasional "out of file descriptor" error, especially when performing
a VACUUM. Like so...


2004-04-13 23:30:05 LOG:  out of file descriptors: Too many open
files; release and retry

CONTEXT:  writing block 1 of relation 67553/16604


I'm going to do my best to provide my current system settings that
relate to Postgres. It would be great if someone could tell me where
I'm way off, and get me on the right track. I'm under the impression
that my machine should be able to handle 200 to 500 client
connections. If that's not the case, I'm fine with getting new
hardware, I just don't want to go to that step "willy nilly". Thanks!


<bold>1. Snipped from postgresql.conf (the only three settings I've
changed)</bold>


     max_connections = 200

     ...

     shared_buffers = 2000

     ...

     max_files_per_process = 100



<bold>2. Snipped from /etc/profile</bold>


     ulimit -u 512



<bold>3. Snipped from /etc/rc</bold>


     sysctl -w kern.sysv.shmmax=167772160

     sysctl -w kern.sysv.shmmin=1

     sysctl -w kern.sysv.shmmni=32

     sysctl -w kern.sysv.shmseg=8

     sysctl -w kern.sysv.shmall=65536



<bold>4. Snipped from etc/sysctl.conf</bold>


     # Turn up maxproc

     kern.maxproc=2048


     # Turn up the maxproc per user

     kern.maxprocperuid=512</excerpt>
I have not received a response yet on this. Should I try another
postgres list or do I need to provide more information/clarity? Thanks.

On Apr 14, 2004, at 12:48 PM, Joe Lester wrote:

> I'm trying to figure out what the optimal Postgres configuration would
> be for my server (with 200 connecting clients, even though I'd really
> like to get it up to 500).
>
> I've got a 700 MHz eMac running Mac OS 10.3.2 (Panther) with 512 MB of
> RAM. I've messed around with some settings but I'm still getting an
> occasional "out of file descriptor" error, especially when performing
> a VACUUM. Like so...
>
> 2004-04-13 23:30:05 LOG:  out of file descriptors: Too many open
> files; release and retry
> CONTEXT:  writing block 1 of relation 67553/16604
>
> I'm going to do my best to provide my current system settings that
> relate to Postgres. It would be great if someone could tell me where
> I'm way off, and get me on the right track. I'm under the impression
> that my machine should be able to handle 200 to 500 client
> connections. If that's not the case, I'm fine with getting new
> hardware, I just don't want to go to that step "willy nilly". Thanks!
>
> 1. Snipped from postgresql.conf (the only three settings I've changed)
>
>      max_connections = 200
>      ...
>      shared_buffers = 2000
>      ...
>      max_files_per_process = 100
>
>
> 2. Snipped from /etc/profile
>
>      ulimit -u 512
>
>
> 3. Snipped from /etc/rc
>
>      sysctl -w kern.sysv.shmmax=167772160
>      sysctl -w kern.sysv.shmmin=1
>      sysctl -w kern.sysv.shmmni=32
>      sysctl -w kern.sysv.shmseg=8
>      sysctl -w kern.sysv.shmall=65536
>
>
> 4. Snipped from etc/sysctl.conf
>
>      # Turn up maxproc
>      kern.maxproc=2048
>
>      # Turn up the maxproc per user
>      kern.maxprocperuid=512