On 2021/05/20 17:38, Masahiro Ikeda wrote:
On 2021/05/20 17:00, Fujii Masao wrote:
On 2021/05/20 9:46, Masahiro Ikeda wrote:
On 2021/05/18 20:10, Fujii Masao wrote:
pg_stat_database.tup_fetched:
Number of index entries returned by scans on indexes in this database
Is this the sum of pg_stat_all_indexes.idx_tup_read? This is accounted to
pg_stat_database.tup_returned.
I was thinking that pg_stat_database.tup_fetched is the same as
the sum of pg_stat_all_tables.idx_tup_fetch. Because they both
are incremented by bitmap index scans, but pg_stat_all_indexes.idx_tup_read
is not.
Yes. So, "Number of index entries returned by scans on indexes in this
database" is incorrect, and "Number of live rows fetched by index scans in
this database" is correct?
Yes, I think so!
Thanks!
I updated the patch for summarizing this thread.
Thanks for updating the patch! LGTM.
This is an improvement of documentation, so this should be applied in
v15 dev cycle? If so, could you add the patch to the next CF? Or you think
this is a bug fix and needs to be back-patched?
Regards,
--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION
