Hi, Is anybody have experience about core dump? We have some scripts have been used for a long time, however, recently, they seem to have some problems, the message I got: SSELECT priority from priority where source=lower('questionable') Total insert into preunchecked: 1 Segmentation fault - core dumped Segmentation fault - core dumped This script has been used for a few monthes, no problem. I checked my pgsql.log, I saw: Nov 3 00:58:45 wipeout postgres[1638]: query: INSERT INTO source(id,source) SELECT id,'questionable' from preunchecked WHERE insertdate>= '2000-11 -03 00:58:45-08' Nov 3 00:58:46 wipeout postgres[1642]: query: SELECT version() Nov 3 00:58:46 wipeout postgres[1642]: query: begin Nov 3 00:58:46 wipeout postgres[1642]: ProcessUtility: begin Nov 3 00:58:46 wipeout postgres[1642]: query: set transaction isolation level serializable Nov 3 00:58:46 wipeout postgres[1642]: ProcessUtility: set transaction isolation level serializable Nov 3 00:58:46 wipeout postgres[1642]: query: SELECT oid from pg_database where datname = 'template1' Nov 3 00:58:46 wipeout postgres[1642]: query: SELECT pg_type.oid, typowner, typname, typlen, typprtlen, typinput, typoutput, typreceive, typsend, typelem, typdeli m, typdefault, typrelid, typbyval, usename from pg_type, pg_user where typowner = usesysid Nov 3 00:58:46 wipeout postgres[1642]: query: SELECT pg_proc.oid, proname, prolang, pronargs, prorettype, proretset, proargtypes, prosrc, probin, usename from pg_ proc, pg_user where pg_proc.oid > '17216'::oid and proowner = usesysid Nov 3 00:58:46 wipeout postgres[1642]: query: SELECT pg_aggregate.oid, aggname, aggtransfn1, aggtransfn2, aggfinalfn, aggtranstype1, aggbasetype, aggtranstype2, a gginitval1, agginitval2, usename from pg_aggregate, pg_user where aggowner = usesysid ................ We have no script to open a new session[1642], how this happen? how I to prevent this?? Thanks! -- Jie LIANG Internet Products Inc. 10350 Science Center Drive Suite 100, San Diego, CA 92121 Office:(858)320-4873 [EMAIL PROTECTED] www.ipinc.com