What version of postgres are you on? From: Satish Burnwal (sburnwal) [mailto:sburn...@cisco.com] Sent: Tuesday, April 13, 2010 8:04 AM To: Plugge, Joe R.; pgsql-general@postgresql.org Cc: pgsql-ad...@postgresql.org Subject: RE: Query is stuck
controlsmartdb=# select * from pg_stat_activity where waiting='t'; ERROR: column "waiting" does not exist From: Plugge, Joe R. [mailto:jrplu...@west.com] Sent: Tuesday, April 13, 2010 6:32 PM To: Satish Burnwal (sburnwal); pgsql-general@postgresql.org Cc: pgsql-ad...@postgresql.org Subject: RE: Query is stuck What do you get when you run this? select * from pg_stat_activity where waiting='t'; From: pgsql-admin-ow...@postgresql.org [mailto:pgsql-admin-ow...@postgresql.org] On Behalf Of Satish Burnwal (sburnwal) Sent: Tuesday, April 13, 2010 7:58 AM To: pgsql-general@postgresql.org Cc: pgsql-ad...@postgresql.org Subject: [ADMIN] Query is stuck I have a query which is not giving me the result even after 30 minutes. I want to know how to detect what is going and what's wrong ? EXPLAIN query - gives me the following: controlsmartdb=# explain select report_id, dm_ip, dm_mac, dm_user, dm_os, report_time, sys_name, sys_user, sys_user_domain, ss_key, login_time, role_id, new_vlan_id from repcopy as a where report_time = (select max(report_time) from repcopy as b where a.dm_ip = b.dm_ip and a.dm_user=b.dm_user and b.ss_key != '') and report_status = 0 and dm_user = 'u1'; QUERY PLAN ---------------------------------------------------------------------------------------------------------------------------- Seq Scan on repcopy a (cost=0.00..1630178118.35 rows=35 width=133) Filter: ((report_status = 0) AND ((dm_user)::text = 'u1'::text) AND (report_time = (subplan))) SubPlan -> Aggregate (cost=8151.65..8151.66 rows=1 width=8) -> Seq Scan on repcopy b (cost=0.00..8151.65 rows=1 width=8) Filter: ((($0)::text = (dm_ip)::text) AND (($1)::text = (dm_user)::text) AND ((ss_key)::text <> ''::text)) (6 rows) But EXPLAIN ANALYSE query hangs (is not giving me any output even after 30 minutes). Pg_stat_activity shows this - SELECT procpid, usename, current_query, query_start from pg_stat_activity: 2942 | postgres | select report_id, dm_ip, dm_mac, dm_user, dm_os, report_time, sys_name, sys_user, sys_user_domain, ss_key, login_time, role_id, new_vlan_id from repcopy as a where report_time = (select max(report_time) from repcopy as b where a.dm_ip = b.dm_ip and a.dm_user=b.dm_user and b.ss_key != '') and report_status = 0 and dm_user = 'u1'; | 2010-04-13 18:20:02.828623+05:30 In such a case what can I do ?
