| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, RKN Sai Krishna <rknsaiforpostgres(at)gmail(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Greg Stark <stark(at)mit(dot)edu>, Jeremy Schneider <schneider(at)ardentperf(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, SATYANARAYANA NARLAPURAM <satyanarlapuram(at)gmail(dot)com>, marvin_liang(at)qq(dot)com, actyzhang(at)outlook(dot)com |
| Subject: | Re: pg_walinspect - a new extension to get raw WAL data and WAL stats |
| Date: | 2022-04-01 23:44:47 |
| Message-ID: | 20220401234447.ztuylaf6rbol2mvw@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2022-04-01 16:35:38 -0700, Jeff Davis wrote:
> * I don't think we need the stats at all. We can run GROUP BY queries
> on the results of pg_get_wal_records_info().
It's well over an order of magnitude slower. And I don't see how that can be
avoided. That makes it practically useless.
See numbers at the bottom of
https://postgr.es/m/CALj2ACUvU2fGLw7keEpxZhGAoMQ9vrCPX-13hexQPoR%2BQRbuOw%40mail.gmail.com
Greetings,
Andres Freund
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