Re: [HACKERS] Full page writes improvement

Tom Lane wrote:
> Koichi Suzuki <suzuki(dot)koichi(at)oss(dot)ntt(dot)co(dot)jp> writes:
>> Here's an idea and a patch for full page writes improvement.
>
>> Idea:
>> (1) keep full page writes for ordinary WAL, make them available during
>> the crash recovery, -> recovery from inconsistent pages which can be
>> made at the crash,
>> (2) Remove them from the archive log except for those written during
>> online backup (between pg_start_backup and pg_stop_backup) -> small size
>> archive log.
>
> Doesn't this break crash recovery on PITR slaves?

Compressed archive log contains the same data as full_page_writes off
case. So the influence to PITR slaves is the same as full_page_writes off.

K.Suzuki

>
> regards, tom lane
>
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--
Koichi Suzuki