On Thu, Mar 3, 2011 at 9:15 AM, Alvaro Herrera <alvhe...@commandprompt.com> wrote: > Excerpts from Fujii Masao's message of mié mar 02 22:44:45 -0300 2011: >> On Thu, Mar 3, 2011 at 3:22 AM, Alvaro Herrera <alvhe...@alvh.no-ip.org> >> wrote: >> > I noticed that in standalone mode, WAL segments don't seem to be >> > recycled. This could get problematic if you're forced to vacuum large >> > tables in that mode and space for WAL is short. >> >> Checkpoint is required to recycle old WAL segments. Can checkpoint >> be executed in standalone mode? even during VACUUM FULL? > > Hmm, I guess it would violate POLA that the standalone server would > decide to run checkpoint in the middle of vacuum. I imagine that in > some cases the only option would be to process the tables manually, with > the ALTER TABLE/SET TYPE trick or similar (VACUUM FULL in 9.0+). > > So I can see that there is no good fix for this problem, yet it is a > very inconvenient situation to be in.
I don't think it would violate the POLA for a standalone backend to checkpoint periodically, but I have to admit I can count the number of times I've run a standalone backend on one hand. Does this come up much? -- 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
