On October 21, 2015 9:47:45 PM GMT+02:00, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>Jim Nasby <Jim.Nasby@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
needa cleanup lock is IIRC repairing page fragmentation / hot pruning, not freezing.
Andres
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