On 09/13/12 2:08 PM, Sébastien Lorion wrote:
I started db creation over, this time with 16GB maintenance_work_mem and fsync=off and it does not seem to have a great effect. After again 5 hours, during index creation, disk and cpu are barely used: 95% idle and 2-3 MB/s writes (150 reads/s, 90 writes/s).
I've never had to set maintenance_work_mem any higher than 1gb for plenty good enough performance.
whats the %busy on the disk ? if you have a slow disk device (such as a shared virtual disk), 90 write/sec may be all its good for. MB/s is fairly meaningless when dealing with random committed writes.
-- john r pierce N 37, W 122 santa cruz ca mid-left coast -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
