Add writeback to pg_stat_io 28e626bde00 added the concept of IOOps but neglected to include writeback operations. ac8d53dae5 added time spent doing these I/O operations. Without counting writeback, checkpointer write time in the log often differed substantially from that in pg_stat_io. To fix this, add IOOp IOOP_WRITEBACK and track writeback in pg_stat_io. Bumps catversion. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com> Reported-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/20230419172326.dhgyo4wrrhulovt6%40awork3.anarazel.de Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/093e5c57d506783a95dd8feddd9a3f2651e1aeba Modified Files -------------- doc/src/sgml/monitoring.sgml | 26 ++++++++++++++++++++++++++ src/backend/catalog/system_views.sql | 2 ++ src/backend/storage/buffer/bufmgr.c | 32 +++++++++++++++++++++++++------- src/backend/utils/activity/pgstat_io.c | 14 ++++++++------ src/backend/utils/adt/pgstatfuncs.c | 5 +++++ src/include/catalog/catversion.h | 2 +- src/include/catalog/pg_proc.dat | 6 +++--- src/include/pgstat.h | 3 ++- src/include/storage/buf_internals.h | 5 +++-- src/test/regress/expected/rules.out | 4 +++- src/test/regress/expected/stats.out | 4 ++-- src/test/regress/sql/stats.sql | 4 ++-- 12 files changed, 82 insertions(+), 25 deletions(-)
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