Hi We are facing performance problems in postgres while executing a query. When I execute this query on the server it takes 5-10 seconds. Also I get good performance while executing this query from my code in java with the hard codes values. I face severe performance problems when I run it using a prepared statement. The query is as follows: Select events.event_id, ctrl.real_name, events.tsds, events.value, events.lds, events.correction, ctrl.type, ctrl.freq from iso_midw_data_update_events events, iso_midw_control ctrl where events.obj_id = ctrl.obj_id and events.event_id > 68971124 order by events.event_id limit 2000 The above query executes in 5-10 seconds. However the below query executes in 8 mins: Select events.event_id, ctrl.real_name, events.tsds, events.value, events.lds, events.correction, ctrl.type, ctrl.freq from table events, iso_midw_control ctrl where events.obj_id = ctrl.obj_id and events.event_id > ?::bigint order by events.event_id limit ? setLong(1, 68971124); setInt(2, 2000); The table has close to 5 million rows. The table has the following index: iso_midw_data_update_events_event_id_key iso_midw_data_update_events_lds_idx iso_midw_data_update_events_obj_id_idx The table is described as follows: Columns_name data_type type_name column_size lds 2 numeric 13 obj_id 2 numeric 6 tsds 2 numeric 13 value 12 varchar 22 correction 2 numeric 1 delta_lds_tsds 2 numeric 13 event_id -5 bigserial 8 Please tell me what I am missing while setting the prepared statement. I am using postgres7.4.2. and postgresql-8.1-407.jdbc3.jar. Thanks Regards Rohit **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***
