Andreas Pflug <pgadmin(at)pse-consulting(dot)de> writes:
> Until recently, pg_relation_size used SearchSysCache to locate the
> relation to examine, and calculated the file location from that
> information. Starting with dbsize.c V1.5 (committed after Beta2),
> relation_open(.., AccessShareLock) is used. This is very unfortunate
> because it will not allow to observe a table growing while it is
> populated, e.g. with a lengthy COPY; pg_relation_size will be blocked.
Nonsense.
> After reverting to 1.4, everything was fine again.
> Can we have this reverted/fixed?
Can we have the actual problem explained?
regards, tom lane