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Robert Haas 46846433a0 shm_mq: Update mq_bytes_written less often. 
Do not update shm_mq's mq_bytes_written until we have written
an amount of data greater than 1/4th of the ring size, unless
the caller of shm_mq_send(v) requests a flush at the end of
the message. This reduces the number of calls to SetLatch(),
and also the number of CPU cache misses, considerably, and thus
makes shm_mq significantly faster.

Dilip Kumar, reviewed by Zhihong Yu and Tomas Vondra. Some
minor cosmetic changes by me.

Discussion: http://postgr.es/m/CAFiTN-tVXqn_OG7tHNeSkBbN+iiCZTiQ83uakax43y1sQb2OBA@mail.gmail.com
2021-10-14 16:13:36 -04:00
..
backend shm_mq: Update mq_bytes_written less often. 2021-10-14 16:13:36 -04:00
bin pg_amcheck: avoid unhelpful verification attempts. 2021-10-13 14:08:12 -07:00
common Fix memory leak in pg_hmac 2021-10-01 22:47:05 +02:00
fe_utils Skip trailing whitespaces when parsing integer options 2021-07-27 10:39:05 +09:00
include shm_mq: Update mq_bytes_written less often. 2021-10-14 16:13:36 -04:00
interfaces Fix check for trapping exit() calls in libpq 2021-10-04 21:04:11 +02:00
makefiles Add NO_INSTALL option to pgxs 2021-05-27 13:58:29 +02:00
pl plperl: update ppport.h to Perl 5.34.0. 2021-10-07 13:59:43 -04:00
port Treat ETIMEDOUT as indicating a non-recoverable connection failure. 2021-09-30 14:16:08 -04:00
template Further tweaking of PG_SYSROOT heuristics for macOS. 2021-01-20 12:07:23 -05:00
test shm_mq: Update mq_bytes_written less often. 2021-10-14 16:13:36 -04:00
timezone Doc: improve timezone/README's recipe for tracking Windows zones. 2021-10-06 13:38:42 -04:00
tools Fix WAL replay in presence of an incomplete record 2021-09-29 11:21:51 -03:00
tutorial doc: Prefer explicit JOIN syntax over old implicit syntax in tutorial 2021-04-08 10:51:26 +02:00
.gitignore
DEVELOPERS
Makefile Remove the option to build thread_test.c outside configure. 2020-10-21 12:08:48 -04:00
Makefile.global.in Provide error hint if TAP tests are not enabled 2021-10-04 11:46:29 +02:00
Makefile.shlib AIX: Fix missing libpq symbols by respecting SHLIB_EXPORTS. 2021-09-06 11:27:59 -07:00
nls-global.mk Add errhint_plural() function and make use of it 2021-03-31 09:16:25 +02:00