On Fri, Sep 30, 2005 at 06:24:52PM -0400, Sean Davis wrote: > -> Seq Scan on u_all_est_mrna c (cost=0.00..932582.74 rows=24225174 > width=179) (actual time=17.384..302484.904 rows=24225174 loops=1) That step is where most of your time is being spent, which isn't surprising given that it's scanning 24M rows. An index on abs(tend-tstart) might help eliminate that. It will also probably help if you increase the statistics_target for u_all_est_mrna, since it might be best to join before filtering on abs(tend-tstart), which is the opposite of what it's doing now. -- Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
