pgsql/ oc/src/sgml/wal.sgml rc/backend/access/ ...

CVSROOT: /home/projects/pgsql/cvsroot
Module name: pgsql
Changes by: tgl(at)hub(dot)org 01/02/25 19:50:08

Modified files:
doc/src/sgml : wal.sgml
src/backend/access/transam: xact.c xlog.c
src/backend/storage/ipc: sinval.c
src/backend/utils/misc: guc.c postgresql.conf.sample
src/bin/psql : tab-complete.c
src/include/access: xlog.h
src/include/storage: proc.h sinval.h

Log message:
Implement COMMIT_SIBLINGS parameter to allow pre-commit delay to occur
only if at least N other backends currently have open transactions. This
is not a great deal of intelligence about whether a delay might be
profitable ... but it beats no intelligence at all. Note that the default
COMMIT_DELAY is still zero --- this new code does nothing unless that
setting is changed.
Also, mark ENABLEFSYNC as a system-wide setting. It's no longer safe to
allow that to be set per-backend, since we may be relying on some other
backend's fsync to have synced the WAL log.