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* docs/9.1/static/kernel-resources.html needs updating for NetBSD
@ 2013-02-20 16:42 Emmanuel Kasper <[email protected]>
0 siblings, 1 reply; 2+ messages in thread
From: Emmanuel Kasper @ 2013-02-20 16:42 UTC (permalink / raw)
To: pgsql-docs
Hello
The default number of semaphores sets of NetBSD ist too low for Postgres
(tested on 9.1)
I would suggest replacing the sentence:
In NetBSD 5.0 and later, IPC parameters can be adjusted using sysctl,
for example:
$ sysctl -w kern.ipc.shmmax=16777216
with the following:
The default settings are only suitable for small installations. In
NetBSD 5.0 and later, IPC parameters should be adjusted using sysctl,
for example:
$ sysctl -w kern.ipc.shmmax=16777216
$ sysctl -w kern.ipc.semmni=256
$ sysctl -w kern.ipc.semmns=512
Tuning NetBSD for Postgres is mentionned at
http://wiki.netbsd.org/tutorials/tuning_netbsd_for_performance/
Emmanuel
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^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: docs/9.1/static/kernel-resources.html needs updating for NetBSD
@ 2013-02-24 23:55 Peter Eisentraut <[email protected]>
parent: Emmanuel Kasper <[email protected]>
0 siblings, 0 replies; 2+ messages in thread
From: Peter Eisentraut @ 2013-02-24 23:55 UTC (permalink / raw)
To: Emmanuel Kasper <[email protected]>; +Cc: pgsql-docs
On Wed, 2013-02-20 at 17:42 +0100, Emmanuel Kasper wrote:
> Hello
>
> The default number of semaphores sets of NetBSD ist too low for Postgres
> (tested on 9.1)
>
> I would suggest replacing the sentence:
>
> In NetBSD 5.0 and later, IPC parameters can be adjusted using sysctl,
> for example:
>
> $ sysctl -w kern.ipc.shmmax=16777216
>
>
> with the following:
>
> The default settings are only suitable for small installations. In
> NetBSD 5.0 and later, IPC parameters should be adjusted using sysctl,
> for example:
>
> $ sysctl -w kern.ipc.shmmax=16777216
> $ sysctl -w kern.ipc.semmni=256
> $ sysctl -w kern.ipc.semmns=512
In 9.3, the requirements for shared memory have changed, so this might
no longer be appropriate advice going forward.
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