pgstat: split reporting/fetching of bgwriter and checkpointer stats.
These have been unrelated since bgwriter and checkpointer were split into two
processes in 806a2aee379. As there several pending patches (shared memory
stats, extending the set of tracked IO / buffer statistics) that are made a
bit more awkward by the grouping, split them. Done separately to make
reviewing easier.
This does *not* change the contents of pg_stat_bgwriter or move fields out of
bgwriter/checkpointer stats that arguably do not belong in either. However
pgstat_fetch_global() was renamed and split into
pgstat_fetch_stat_checkpointer() and pgstat_fetch_stat_bgwriter().
Author: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20210405092914.mmxqe7j56lsjfsej@alap3.anarazel.de
Branch
------
master
Details
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https://git.postgresql.org/pg/commitdiff/1bc8e7b0991c1eae5fa6dc2d29bb2280efb52740
Modified Files
--------------
src/backend/access/transam/xlog.c | 4 +-
src/backend/postmaster/checkpointer.c | 26 ++++---
src/backend/postmaster/pgstat.c | 124 ++++++++++++++++++++++++++++------
src/backend/storage/buffer/bufmgr.c | 8 +--
src/backend/utils/adt/pgstatfuncs.c | 27 ++++----
src/include/pgstat.h | 63 +++++++++++++----
6 files changed, 185 insertions(+), 67 deletions(-)