On Thu, May 24, 2012 at 12:34 PM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote: > Lonni J Friedman <netllama@xxxxxxxxx> writes: >> No, not lots of subqueries or ORDERing, and most queries only touch a >> single table. However, I'm honestly not sure that I'm following where >> you're going with this. The problem isn't triggered by explicit >> queries. I can disable all external access, and simply wait for >> autovacuum to kick off, and the box starts to die. > > Can you correlate the performance hit with any specific part of > autovacuum? In particular, I'm wondering if it matters whether vacuum > is cleaning tables or indexes --- it alternates between the two, and the > access patterns are a bit different. You could probably watch what the > autovac process is doing with strace to see what it's accessing. Is there something specific I should be looking for in the strace output, or is this just a matter of correlating PID and FD to pg_class.relfilenode ? -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
