On Tue, Aug 4, 2009 at 11:56 PM, Robert Haas<robertmhaas@xxxxxxxxx> wrote: > Beats me. It looks like the first few queries are pulling stuff into > cache, and then after that it settles down, but I'm not sure why it > takes 5 repetitions to do that. Is the plan changing? Yeah, we're just guessing without the explain analyze output. But as long as we're guessing, perhaps it's doing a sequential scan on one of the tables and each query is reading in new parts of the table until the whole table is in cache. Is this a machine with lots of RAM but a small setting for shared_buffers? -- greg http://mit.edu/~gsstark/resume.pdf -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
