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From: Sami Imseih <[email protected]>
To: Ilia Evdokimov <[email protected]>
Cc: Andrey Borodin <[email protected]>
Cc: Alena Rybakina <[email protected]>
Cc: Alexander Korotkov <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: Greg Sabino Mullane <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Sample rate added to pg_stat_statements
Date: Tue, 4 Feb 2025 11:59:05 -0600
Message-ID: <CAA5RZ0tJjrX6YiQVDZCOA_BDMuhO-po_T8a3PmjxEEH_iL-qMg@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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> To summarize the results of all benchmarks, I compiled them into a table:
Thanks for compiling the benchmark data above.

The main benefit of this patch will be to give the user
a toggle if they are observing high spinlock contention
due to pg_stat_statements which will likely occur
on larger machines.

I also did not see this thread [1] mentioned in the thread above,
but one of the reasons pg_stat_statements.track_planning
was turned off by default was due to the additional spinlock
acquire to track the planning stats. Bringing this up as sample_rate
might also be beneficial as well if a user decides to track planning.

Regards,

Sami

[1] https://www.postgresql.org/message-id/flat/[email protected]...






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