From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andrew Sullivan <ajs@crankycanuck.ca>
Cc: pgsql-sql@postgresql.org
Subject: Re: How to check postgres running or not ?
Date: Mon, 20 Sep 2004 08:19:27 -0400 (EDT)
Message-ID: <200409201219.i8KCJRp05291@candle.pha.pa.us> (raw)
In-Reply-To: <19876.1095613927@sss.pgh.pa.us>
Tom Lane wrote:
> At one time there was discussion of writing a "pg_ping" utility program
> to do exactly this, but it still hasn't got done. You can fake it to
> some extent by just running "psql -l >/dev/null" and checking the exit
> code, but this does require supplying a valid username and possibly a
> password (because psql's exit code doesn't distinguish "could not
> connect" from authentication errors).
>
> BTW, "pg_ctl status" doesn't answer this need because it only looks for
> a postmaster.pid file, it doesn't attempt to verify that the postmaster
> is really alive.
Is improving this a TODO item for pg_ctl?
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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To: pgsql-sql@postgresql.org
Cc: pgman@candle.pha.pa.us, tgl@sss.pgh.pa.us, ajs@crankycanuck.ca
Subject: Re: How to check postgres running or not ?
In-Reply-To: <200409201219.i8KCJRp05291@candle.pha.pa.us>
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