Re: table level locking different in 7.0?

> Jim Mercer <jim(at)reptiles(dot)org> writes:
> > i had several concurrent processes which would do inserts via COPY and
> > queries.
> > on that system, i don't recall the COPY processes as being blocked by the
> > query processes.
> > now i'm running that app on solaris 7 with pgsql 7.0.
> > i'm finding that a big long select is blocking other processes which
> > are doing COPY's.
>
> Hmm. In 7.0, COPY IN acquires an exclusive lock on the target table,
> which is something I put in in a fit of paranoia. It may not really
> be necessary --- probably a regular write lock would be good enough.
> (6.5's COPY code neglected to acquire any lock at all, which is surely
> *not* good enough, but maybe I overreacted.)

I see no reason a write lock would not be good enough, unless we do some
special stuff in copy which I have forgotten.

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