Create and use wait events for read, write, and fsync operations.
Previous commits, notably 53be0b1add7064ca5db3cd884302dfc3268d884e and
6f3bd98ebfc008cbd676da777bb0b2376c4c4bfa, made it possible to see from
pg_stat_activity when a backend was stuck waiting for another backend,
but it's also fairly common for a backend to be stuck waiting for an
I/O. Add wait events for those operations, too.
Rushabh Lathia, with further hacking by me. Reviewed and tested by
Michael Paquier, Amit Kapila, Rajkumar Raghuwanshi, and Rahila Syed.
Discussion: http://postgr.es/m/CAGPqQf0LsYHXREPAZqYGVkDqHSyjf=KsD=k0GTVPAuzyThh-VQ@mail.gmail.com
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/249cf070e36721a65be74838c53acf8249faf935
Modified Files
--------------
doc/src/sgml/monitoring.sgml | 271 ++++++++++++++++++++++++
src/backend/access/heap/rewriteheap.c | 17 +-
src/backend/access/transam/slru.c | 12 ++
src/backend/access/transam/timeline.c | 11 +
src/backend/access/transam/twophase.c | 9 +
src/backend/access/transam/xlog.c | 31 +++
src/backend/access/transam/xlogutils.c | 3 +
src/backend/postmaster/pgstat.c | 233 ++++++++++++++++++++
src/backend/replication/logical/reorderbuffer.c | 9 +
src/backend/replication/logical/snapbuild.c | 14 ++
src/backend/replication/slot.c | 13 ++
src/backend/replication/walsender.c | 4 +
src/backend/storage/file/buffile.c | 11 +-
src/backend/storage/file/copydir.c | 7 +-
src/backend/storage/file/fd.c | 28 ++-
src/backend/storage/ipc/dsm_impl.c | 3 +
src/backend/storage/smgr/md.c | 21 +-
src/backend/utils/cache/relmapper.c | 7 +
src/backend/utils/init/miscinit.c | 17 ++
src/include/pgstat.h | 78 +++++++
src/include/storage/fd.h | 12 +-
21 files changed, 782 insertions(+), 29 deletions(-)