Lukasz Brodziak <lukasz(dot)brodziak(at)gmail(dot)com> writes:
> One question about blocks in PG. I got an error "Could not read block
> <no.> of relation...." it appeared to be in pg_trigger but the thing
> is that the block number was 110 and the file has only 67 pages. So
> the question is how is it possible?
Well, that's why it failed to read the block ;-). The real question is
why was it trying to read a block that doesn't exist in the table.
I'd bet on a corrupt index myself, so try reindexing.
regards, tom lane