Horton

Add pg_stat_wal statistics view.

Fujii Masao <fujii@postgresql.org>

View on postgr.es
Commit: 8d9a935965f01b7759a8c23ff6291000b670a2bf
Author: Fujii Masao <fujii@postgresql.org>
Date: 2020-10-02T01:17:11Z
Releases: 14.0 
Add pg_stat_wal statistics view.

This view shows the statistics about WAL activity. Currently it has only
two columns: wal_buffers_full and stats_reset. wal_buffers_full column
indicates the number of times WAL data was written to the disk because
WAL buffers got full. This information is useful when tuning wal_buffers.
stats_reset column indicates the time at which these statistics were
last reset.

pg_stat_wal view is also the basic infrastructure to expose other
various statistics about WAL activity later.

Bump PGSTAT_FILE_FORMAT_ID due to the change in pgstat format.

Bump catalog version.

Author: Masahiro Ikeda
Reviewed-by: Takayuki Tsunakawa, Kyotaro Horiguchi, Amit Kapila, Fujii Masao
Discussion: https://postgr.es/m/188bd3f2d2233cf97753b5ced02bb050@oss.nttdata.com

Files

PathChange+/−
doc/src/sgml/monitoring.sgml modified +61 −2
src/backend/access/transam/xlog.c modified +1 −0
src/backend/catalog/system_views.sql modified +6 −0
src/backend/postmaster/checkpointer.c modified +3 −0
src/backend/postmaster/pgstat.c modified +114 −6
src/backend/utils/adt/pgstatfuncs.c modified +36 −0
src/include/catalog/catversion.h modified +1 −1
src/include/catalog/pg_proc.dat modified +8 −0
src/include/pgstat.h modified +31 −2
src/test/regress/expected/rules.out modified +3 −0
src/test/regress/expected/sysviews.out modified +7 −0
src/test/regress/sql/sysviews.sql modified +3 −0
src/tools/pgindent/typedefs.list modified +2 −0

Documentation touched

Discussion