Lonni J Friedman <netllama@xxxxxxxxx> writes: > After banging my head on the wall for a long time, I happened to > notice that khugepaged was consuming 100% CPU every time autovacuum > was running. I did: > echo "madvise" > /sys/kernel/mm/transparent_hugepage/defrag > and immediately the entire problem went away. Fascinating. > So this looks like a nasty Fedora16 kernel bug to me, or maybe > postgresql & Fedora16's default kernel settings are just not > compatible? I agree, kernel bug. What kernel version are you using exactly? > Is anyone else using Fedora16 & PostgreSQL-9.1 ? I use an F16 box daily, but can't claim to have done major performance testing with it. Can you put together a summary of your nondefault Postgres settings? I wonder whether it only kicks in for a certain size of shared memory for instance. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
