Provide recovery_init_sync_method=syncfs. Since commit 2ce439f3 we have opened every file in the data directory and called fsync() at the start of crash recovery. This can be very slow if there are many files, leading to field complaints of systems taking minutes or even hours to begin crash recovery.
Provide an alternative method, for Linux only, where we call syncfs() on every possibly different filesystem under the data directory. This is equivalent, but avoids faulting in potentially many inodes from potentially slow storage. The new mode comes with some caveats, described in the documentation, so the default value for the new setting is "fsync", preserving the older behavior. Reported-by: Michael Brown <[email protected]> Reviewed-by: Fujii Masao <[email protected]> Reviewed-by: Paul Guo <[email protected]> Reviewed-by: Bruce Momjian <[email protected]> Reviewed-by: Justin Pryzby <[email protected]> Reviewed-by: David Steele <[email protected]> Discussion: https://postgr.es/m/11bc2bb7-ecb5-3ad0-b39f-df632734cd81%40discourse.org Discussion: https://postgr.es/m/CAEET0ZHGnbXmi8yF3ywsDZvb3m9CbdsGZgfTXscQ6agcbzcZAw%40mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/61752afb26404dfc99a535c7a53f7f04dc110263 Modified Files -------------- configure | 2 +- configure.ac | 1 + doc/src/sgml/config.sgml | 35 +++++++++++++++ src/backend/storage/file/fd.c | 65 ++++++++++++++++++++++++++- src/backend/utils/misc/guc.c | 17 +++++++ src/backend/utils/misc/postgresql.conf.sample | 1 + src/include/pg_config.h.in | 3 ++ src/include/storage/fd.h | 6 +++ src/tools/msvc/Solution.pm | 1 + 9 files changed, 129 insertions(+), 2 deletions(-)
