| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alexander Lakhin <exclusion(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
| Cc: | MARK CALLAGHAN <mdcallag(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org |
| Subject: | Re: benchmark results comparing versions 15.2 and 16 |
| Date: | 2023-05-09 16:48:24 |
| Message-ID: | 20230509164824.wtfn5aoggj4rcz67@awork3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
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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