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From: Andres Freund <[email protected]>
To: Alexander Lakhin <[email protected]>
To: Michael Paquier <[email protected]>
Cc: MARK CALLAGHAN <[email protected]>
Cc: [email protected]
Subject: Re: benchmark results comparing versions 15.2 and 16
Date: Tue, 9 May 2023 09:48:24 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CAFbpF8N4bVFZ+eyWFj_+fZXZFSayk2kJVtZnouUVKGHudiDrSw@mail.gmail.com>
	<[email protected]>
	<[email protected]>

Hi,

On 2023-05-08 12:11:17 -0700, Andres Freund wrote:
> Hi,
> 
> On 2023-05-08 16:00:01 +0300, Alexander Lakhin wrote:
> > This difference is confirmed by multiple test runs. `git bisect` for this
> > regression pointed at f193883fc.
> 
> I can reproduce a significant regression due to f193883fc of a workload just
> running
> SELECT CURRENT_TIMESTAMP;
> 
> A single session running it on my workstation via pgbench -Mprepared gets
> before:
> tps = 89359.128359 (without initial connection time)
> after:
> tps = 83843.585152 (without initial connection time)
> 
> Obviously this is an extreme workload, but that nevertheless seems too large
> to just accept...

Added an open item for this.

Greetings,

Andres Freund

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