Re: Vaccuum allows read access?

Bruce Momjian <pgman@candle.pha.pa.us> writes:
> In the current sources, analyze allows read-access.  I don't think
> vacuum allows any other access because the rows are moving in the file.

VACUUM *must* have exclusive lock.

ANALYZE actually is only a reader (AccessShareLock) and does not lock
out either reading or writing in current sources.
        regards, tom lane