Re: [PATCH] add relation and block-level filtering to pg_waldump

From: David Christensen <david(dot)christensen(at)crunchydata(dot)com>
To: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] add relation and block-level filtering to pg_waldump
Date: 2022-02-25 18:56:16
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Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com> writes:

> On Fri, Feb 25, 2022 at 12:36 AM David Christensen
> <david(dot)christensen(at)crunchydata(dot)com> wrote:
>> Greetings,
>> This patch adds the ability to specify a RelFileNode and optional BlockNum to limit output of
>> pg_waldump records to only those which match the given criteria. This should be more performant
>> than `pg_waldump | grep` as well as more reliable given specific variations in output style
>> depending on how the blocks are specified.
>> This currently affects only the main fork, but we could presumably add the option to filter by fork
>> as well, if that is considered useful.
> Thanks for the patch. This is not adding something that users can't do
> right now, but definitely improves the usability of the pg_waldump as
> it avoids external filterings. Also, it can give the stats/info at
> table and block level. So, +1 from my side.

Attached is V2 with additional feedback from this email, as well as the specification of the
ForkNumber and FPW as specifiable options.



Attachment Content-Type Size
0001-Add-additional-filtering-options-to-pg_waldump.patch text/x-patch 10.6 KB

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