Re: Planning counters in pg_stat_statements (using pgss_store)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, Julien Rouhaud <rjuju123(at)gmail(dot)com>, Sergei Kornilov <sk(at)zsrv(dot)org>, "imai(dot)yoshikazu(at)fujitsu(dot)com" <imai(dot)yoshikazu(at)fujitsu(dot)com>, legrand legrand <legrand_legrand(at)hotmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Planning counters in pg_stat_statements (using pgss_store)
Date: 2021-07-25 22:46:53
Message-ID: 6766.1627253213@sss.pgh.pa.us
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Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> On 7/25/21 12:03 PM, Tom Lane wrote:
>> So AFAICS this test is inherently unstable and there is no code bug
>> to be fixed. We could drop the "plans" column from this query, or
>> print something approximate like "plans > 0 AND plans <= calls".
>> Thoughts?

> Is that likely to tell us anything very useful?

The variant suggested downthread ("plans >= 2 AND plans <= calls" for the
PREPARE entry only) seems like it's still reasonably useful. At least it
can verify that a replan has occurred and been counted.

regards, tom lane

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