My quick and dirty "solution" (Re: Performance Problem with Vacuum of bytea table (PG 8.0.13))

No, this did not help. The vacuum process is still running far too long
and makes everything slow. It is even worse than before, cause now the
system is slow almost all the time while when vacuuming only every 3
hours it is only slow once every three hours.....

I now did the following. Well, no comment.....

Shellscript A:

while true
do
psql -U $user -d $database -c "vacuum analyze verbose binary_cache"
echo "Going to sleep"
sleep 60
done

Shellscript B:

while true
do
ps aux > $tempfile
numwaiting=`grep UPDATE.waiting $tempfile | grep -c -v grep`
echo "Number of waiting updates: $numwaiting"

vacuumpid=`grep VACUUM $tempfile| grep -v grep | awk '{print $2}'`
echo "PID of vacuum process: $vacuumpid"

if [ $numwaiting -gt 5 ]
then
echo "Too many waiting transactions, killing vacuum
process $vacuumpid..."
kill $vacuumpid
fi
echo "Sleeping 30 Seconds"
sleep 30
done

--
Bastian Voigt
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