Chris Dunlop <chris(at)onthe(dot)net(dot)au> writes:
> Trying to start the postmaster again failed, with what looks
> like the relevent message being:
> PANIC: btree_delete_page_redo: lost target page
This is a known possibility if the VACUUM FULL got as far as shortening
the index before crashing --- xlog replay gets unhappy if told to fix
a page that's not there anymore. There's a fix in 8.2, which IIRC
seemed too complex to risk back-porting.
regards, tom lane