XA transactions much slower on 14.2 than on 13.5

From: Mladen Gogala <gogala(dot)mladen(at)gmail(dot)com>
To: Pgsql Performance <pgsql-performance(at)lists(dot)postgresql(dot)org>
Subject: XA transactions much slower on 14.2 than on 13.5
Date: 2022-03-05 02:33:01
Message-ID: b6c413ee-19a4-f3a8-9772-210049c22369@gmail.com
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My boss asked me to upgrade one of the development  databases from 13.5
--> 14.2. One thing that we've noticed right away is that XA
transactions (2-phase commit) are much slower on 14.2 than on 13.5. Were
there any significant changes to the XA protocol in the version 14? Did
anybody else encountered this problem?

When I say "XA transactions are much slower", I mean that commit and/or
rollback take much longer. The SQL execution takes the same and the
plans are identical to the 13.5 version. The application code is the
same, using IBM WebSphere 9.0.4.

Regards

--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
https://dbwhisperer.wordpress.com

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