Re: [PATCH] xlogreader: do not read a file block twice

On Mon, Feb 11, 2019 at 07:32:59PM +0300, Grigory Smolkin wrote:
> Hm, looks like it could speed up PostgreSQL recovery, but is it
> safe?

(Please avoid top-posting.)

> On 02/11/2019 07:25 PM, Arthur Zakirov wrote:
>> Grigory noticed that one of our utilities has very slow performance when
>> xlogreader reads zlib archives. We found out that xlogreader sometimes
>> reads a WAL file block twice.
>>
>> What do you think?

I think that such things, even if they look simple, need a careful
lookup, and I have not looked at the proposal yet.  Could you add it
to the next commit fest so as we don't lose track of it?
https://commitfest.postgresql.org/22/
--
Michael