Improve description of XLOG_RUNNING_XACTS

From: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
To: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Improve description of XLOG_RUNNING_XACTS
Date: 2022-07-21 01:13:25
Message-ID: CAD21AoAqvaE+XEeXHHPdAGQPcCoGXxuoeutq_nWhUSQvTt5+tA@mail.gmail.com
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Hi,

I realized that standby_desc_running_xacts() in standbydesc.c doesn't
describe subtransaction XIDs. I've attached the patch to improve the
description. Here is an example by pg_wlaldump:

* HEAD
rmgr: Standby len (rec/tot): 58/ 58, tx: 0, lsn:
0/01D0C608, prev 0/01D0C5D8, desc: RUNNING_XACTS nextXid 1050
latestCompletedXid 1047 oldestRunningXid 1048; 1 xacts: 1048

* w/ patch
rmgr: Standby len (rec/tot): 58/ 58, tx: 0, lsn:
0/01D0C608, prev 0/01D0C5D8, desc: RUNNING_XACTS nextXid 1050
latestCompletedXid 1047 oldestRunningXid 1048; 1 xacts: 1048; 1
subxacts: 1049

Please review it.

Regards,

--
Masahiko Sawada
EDB: https://www.enterprisedb.com/

Attachment Content-Type Size
0001-Improve-description-of-XLOG_RUNNING_XACTS.patch application/octet-stream 1.3 KB

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