| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Grigory Smolkin <g(dot)smolkin(at)postgrespro(dot)ru> |
| Cc: | pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: [PATCH] xlogreader: do not read a file block twice |
| Date: | 2019-02-12 04:23:00 |
| Message-ID: | 20190212042300.GL1475@paquier.xyz |
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| Thread: | |
| Lists: | pgsql-hackers |
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
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