Re: database vacuum from cron hanging

"Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
> (gdb) p BufferDescriptors[781]
> $1 = {tag = {rnode = {spcNode = 1663, dbNode = 16385, relNode = 2666}, blockNum = 1}, flags = 70, usage_count = 5,
refcount= 4294967294,
 
>   wait_backend_pid = 748, buf_hdr_lock = 0 '\0', buf_id = 781, freeNext = -2, io_in_progress_lock = 1615,
content_lock= 1616}
 

Whoa.  refcount -2?

Well, now we have an idea what to look for anyway ... and the relNode
says this is pg_constraint_contypid_index.  Again.  There's got to be
some broken code affecting that index in particular ...
        regards, tom lane