Re: WAL & ZFS

The WAL is a journal itself and doesn't need another journal for safety.
Therefore, a common recommendation is using ext2 (which has no journal)
for the WAL partition.

Is this correct?

Am 31.03.22 um 23:32 schrieb Rui DeSousa:
> I would recommend a separate pg_wal filesystem with the record size to match the WAL page size; in my case 16k. I have keep the default record size at 128k for the data volume and that configuration has worked well for supporting large DSS while using 16k data blocks.
>
>> On Mar 30, 2022, at 5:32 PM, Scott Ribe <scott_ribe(at)elevated-dev(dot)com> wrote:
>>
>> I've read all the info I could find re running PG on ZFS: turn off full page writes, turn on lz4, tweak recordsize so as to take advantage of compression, etc. One thing I haven't seen is whether a separate volume for WAL would benefit from a larger recordsize. Or any other tweaks???
>>
>> --
>> Scott Ribe
>> scott_ribe(at)elevated-dev(dot)com
>> https://www.linkedin.com/in/scottribe/
>>
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