On October 21, 2015 9:47:45 PM GMT+02:00, Tom Lane <t...@sss.pgh.pa.us> wrote: >Jim Nasby <jim.na...@bluetreble.com> writes: >> While warning a client that just did a Slony-based version upgrade to > >> make sure to freeze the new database, it occurred to me that it >should >> be safe to freeze without the cleanup lock. > >What's your argument for that being safe?
It doesn't affect tuple contents and thus backends having a pin can continue looking at tuple contents. The reason we need a cleanup lock is IIRC repairing page fragmentation / hot pruning, not freezing. Andres --- Please excuse brevity and formatting - I am writing this on my mobile phone. -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers