On Tue, Feb 21, 2012 at 2:00 PM, Pavel Stehule <pavel.steh...@gmail.com> wrote:
> I had to reply to query about usage VACUUM ANALYZE or ANALYZE. I > expected so ANALYZE should be faster then VACUUM ANALYZE. VACUUM ANALYZE scans the whole table sequentially. ANALYZE accesses a random sample of data blocks. Random access is slower than sequential access, so at some threshold of sample size and sequential/random I/O speed ratio ANALYZE could become slower. So it depends upon the hardware and the setting of stats_target. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
