"Ed L." <pgsql@xxxxxxxxxxxxx> writes: > Someone flipped a breaker switch, and evidently triggered > corruption in one of our major clusters: > 2005-06-06 14:31:11.984 [20124] PANIC: Invalid page header in block 22376 of 79189398 It's possible that you are one minor release short of having dodged this problem, as I see in the 7.3.5 CVS log 2003-12-01 11:53 tgl * src/backend/storage/buffer/bufmgr.c (REL7_3_STABLE): Force zero_damaged_pages to be effectively ON during recovery from WAL, since there is no need to worry about damaged pages when we are going to overwrite them anyway from the WAL. Per recent discussion. This doesn't really address the question of how the page header got clobbered in the first place, though. Did you by any chance make a dump to see what data was in there? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend