From: | "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> |
---|---|
To: | "Marti Raudsepp" <marti(at)juffo(dot)org> |
Cc: | <pgsql-bugs(at)postgresql(dot)org> |
Subject: | Re: BUG #3888: postmaster: misleading error message for illegal -B values |
Date: | 2008-01-20 16:32:35 |
Message-ID: | 479377A3.6090404@enterprisedb.com |
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Lists: | pgsql-bugs |
Marti Raudsepp wrote:
> Bug reference: 3888
> Logged by: Marti Raudsepp
> Email address: marti(at)juffo(dot)org
> PostgreSQL version: 8.3RC1
> Operating system: Linux AMD64
> Description: postmaster: misleading error message for illegal -B
> values
> Details:
>
> When launching postmaster with a small -B (number of buffers) value, it
> reports the following error:
> "postmaster: the number of buffers (-B) must be at least twice the number of
> allowed connections (-N) and at least 16"
>
> However, as of PostgreSQL 8.3, postmaster requires that the number of
> buffers is at least (max_connections*2 + 6)
Hmm. The minimum is actually (max_connections + max_autovacuum_workers)
* 2. The default max_autovacuum_workers is 3, which is where that 6
(2*3) comes from.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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