Re: restarting after power outage

Tom Lane wrote:
> Jon Lapham <lapham(at)jandr(dot)org> writes:
>
>>After a power outage (and bad UPS combo, or plug pull, or bad RAM, etc)
>>sometimes (I would guess <10% of the time) postgresql fails to restart
>>automatically after booting the computer. Invariably, it is because the
>>"postmaster.pid" file exists, but maybe this is just a symptom of
>>something else. The solution I have been performing is to simply delete
>>this file, and then restart postgres (service postgresql start).
>
>>Is this the correct procedure?
>
> It is. We have been fooling with the postmaster startup logic to try to
> eliminate this gotcha, but it's only very recently (8.0.2) that I think
> we got it right.

So, then it would be correct to change my init scripts to do the
following: (if so, this patch can be applied to the 7.4 branch)

--- postgresql 2005-02-21 16:33:37.000000000 -0300
+++ postgresql_pidkiller 2005-04-27 15:38:03.000000000 -0300
@@ -178,6 +178,13 @@
fi

echo -n "$PSQL_START"
+
+ # If there is a stray postmaster.pid file laying around, remove it
+ if [ -f "${PGDATA}/postmaster.pid" ]
+ then
+ rm ${PGDATA}/postmaster.pid
+ fi
+
$SU -l postgres -c "$PGENGINE/postmaster -p ${PGPORT} -D
'${PGDATA}' ${PGOPTS} &" >> $PGLOG 2>&1 < /dev/null
sleep 2
pid=`pidof -s $PGENGINE/postmaster`

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Jon Lapham <lapham(at)jandr(dot)org> Rio de Janeiro, Brasil
Personal: http://www.jandr.org/
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