On Tue, Mar 14, 2006 at 09:02:49AM -0300, andremachado wrote: > Hello, > Attached is a file containing the problematic queries cited yesterday, with > "explain", "\di" and "show all" outputs. > The first one finished in almost 4 hours. Firebird for windows finished in 1m30s. > The second one CRASHED after some hours, without finishing. The error message > is at the file too. PANIC: could not open file "pg_xlog/0000000100000018000000E7" (log file 24, segment 231): Invalid argument IIRC that means you have a data corruption issue. As for the queries, EXPLAIN ANALYZE would be in order here. It looks like the first one might benefit from increasing work_memory. -- 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