Re: silent_mode and LINUX_OOM_ADJ

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Peter Geoghegan <peter(at)2ndquadrant(dot)com>
Subject: Re: silent_mode and LINUX_OOM_ADJ
Date: 2011-06-24 14:37:24
Message-ID: 1308926157-sup-7749@alvh.no-ip.org
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Excerpts from Heikki Linnakangas's message of vie jun 24 07:01:57 -0400 2011:
> While reviewing Peter Geoghegan's postmaster death patch, I noticed that
> if you turn on silent_mode, the LINUX_OOM_ADJ code in fork_process()
> runs when postmaster forks itself into background. That re-enables the
> OOM killer in postmaster, if you've disabled it in the startup script by
> adjusting /proc/self/oom_adj. That seems like a bug, albeit a pretty
> minor one.
>
> This may be a dumb question, but what is the purpose of silent_mode?
> Can't you just use nohup?

I think silent_mode is an artifact from when our daemon handling in
general was a lot more primitive (I bet there wasn't even pg_ctl then).
Maybe we could discuss removing it altogether.

--
Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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