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
>> 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.


Please excuse brevity and formatting - I am writing this on my mobile phone.

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