On Wed, Jan 4, 2012 at 4:06 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Robert Haas <robertmh...@gmail.com> writes: >> But, the OP makes me wonder: why can a standby only perform a >> restartpoint where the master performed a checkpoint? It seems like a >> standby ought to be able to create a restartpoint anywhere, just by >> writing everything, flushing it to disk, and update pg_control. > > Perhaps, but then crash restarts would have to accept start pointers > that point at any random place in the WAL. I like the additional error > checking of verifying that there's a checkpoint recod there.
I could go either way on that one, but... > Also > I think the full-page-write mechanism would no longer protect against > torn pages during replay if you did that. ...this is a very good point. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
