delta/postgresql.git/contrib/pg_buffercache/sql, branch master git.postgresql.org: git/postgresql.git Add pg_buffercache_usage_counts() to contrib/pg_buffercache. 2023-04-07T18:25:53+00:00 Tom Lane tgl@sss.pgh.pa.us 2023-04-07T18:25:45+00:00 f3fa31327ecba75ee0e946abaa56dbf471ba704b It was pointed out that pg_buffercache_summary()'s report of the overall average usage count isn't that useful, and what would be more helpful in many cases is to report totals for each possible usage count. Add a new function to do it like that. Since pg_buffercache 1.4 is already new for v16, we don't need to create a new extension version; we'll just define this as part of 1.4. Nathan Bossart Discussion: https://postgr.es/m/20230130233040.GA2800702@nathanxps13 
It was pointed out that pg_buffercache_summary()'s report of
the overall average usage count isn't that useful, and what
would be more helpful in many cases is to report totals for
each possible usage count.  Add a new function to do it like
that.  Since pg_buffercache 1.4 is already new for v16,
we don't need to create a new extension version; we'll just
define this as part of 1.4.

Nathan Bossart

Discussion: https://postgr.es/m/20230130233040.GA2800702@nathanxps13
pg_buffercache: Add pg_buffercache_summary() 2022-10-13T16:55:46+00:00 Andres Freund andres@anarazel.de 2022-10-13T16:55:46+00:00 2589434ae0fbfe08e46b6a4ffba400140b636074 Using pg_buffercache_summary() is significantly cheaper than querying pg_buffercache and summarizing in SQL. Author: Melih Mutlu <m.melihmutlu@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Aleksander Alekseev <aleksander@timescale.com> Reviewed-by: Zhang Mingli <zmlpostgres@gmail.com> Discussion: https://postgr.es/m/CAGPVpCQAXYo54Q%3D8gqBsS%3Du0uk9qhnnq4%2B710BtUhUisX1XGEg%40mail.gmail.com 
Using pg_buffercache_summary() is significantly cheaper than querying
pg_buffercache and summarizing in SQL.

Author: Melih Mutlu <m.melihmutlu@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Reviewed-by: Zhang Mingli <zmlpostgres@gmail.com>
Discussion: https://postgr.es/m/CAGPVpCQAXYo54Q%3D8gqBsS%3Du0uk9qhnnq4%2B710BtUhUisX1XGEg%40mail.gmail.com
Add regression test coverage for contrib/pg_buffercache. 2022-07-30T19:33:44+00:00 Tom Lane tgl@sss.pgh.pa.us 2022-07-30T19:33:44+00:00 be39d88934331c47c43d8c51500305e928f06240 We can't check the output of this view very closely without creating portability headaches, but we can make sure that the number of rows is as-expected. In any case, this is sufficient to exercise all the C code within, which is a lot better than the 0% coverage we had before. DongWook Lee Discussion: https://postgr.es/m/CAAcByaLCHGJB7qAENEcx9D09UL=w4ma+yijwF_-1MSqQZ9wK6Q@mail.gmail.com 
We can't check the output of this view very closely without
creating portability headaches, but we can make sure that
the number of rows is as-expected.  In any case, this is
sufficient to exercise all the C code within, which is a
lot better than the 0% coverage we had before.

DongWook Lee

Discussion: https://postgr.es/m/CAAcByaLCHGJB7qAENEcx9D09UL=w4ma+yijwF_-1MSqQZ9wK6Q@mail.gmail.com