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3cda10f41b
postgresql/src/backend
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Heikki Linnakangas 3cda10f41b Use atomic ops to hand out pages to scan in parallel scan. 
With a lot of CPUs, the spinlock that protects the current scan location
in a parallel scan can become a bottleneck. Use an atomic fetch-and-add
instruction instead.

David Rowley

Discussion: https://www.postgresql.org/message-id/CAKJS1f9tgsPhqBcoPjv9_KUPZvTLCZ4jy%3DB%3DbhqgaKn7cYzm-w@mail.gmail.com
2017-08-16 16:18:41 +03:00
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access Use atomic ops to hand out pages to scan in parallel scan. 2017-08-16 16:18:41 +03:00
bootstrap Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
catalog Include foreign tables in information_schema.table_privileges 2017-08-15 19:27:22 -04:00
commands Fix up some misusage of appendStringInfo() and friends 2017-08-15 23:34:39 -04:00
executor Add missing call to ExecReScanGatherMerge. 2017-08-15 08:06:36 -04:00
foreign Abstract logic to allow for multiple kinds of child rels. 2017-04-03 22:41:31 -04:00
lib Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
libpq Final pgindent + perltidy run for v10. 2017-08-14 17:29:33 -04:00
main Change pg_ctl to detect server-ready by watching status in postmaster.pid. 2017-06-28 17:31:32 -04:00
nodes Fix up some misusage of appendStringInfo() and friends 2017-08-15 23:34:39 -04:00
optimizer Avoid out-of-memory in a hash join with many duplicate inner keys. 2017-08-15 14:05:53 -04:00
parser Final pgindent + perltidy run for v10. 2017-08-14 17:29:33 -04:00
po Translation updates 2017-08-07 13:55:34 -04:00
port Change pg_ctl to detect server-ready by watching status in postmaster.pid. 2017-06-28 17:31:32 -04:00
postmaster Simplify autovacuum work-item implementation 2017-08-15 18:14:07 -03:00
regex Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
replication Fix up some misusage of appendStringInfo() and friends 2017-08-15 23:34:39 -04:00
rewrite Teach map_partition_varattnos to handle whole-row expressions. 2017-08-03 11:21:29 -04:00
snowball Initial pgindent run with pg_bsd_indent version 2.0. 2017-06-21 14:39:04 -04:00
statistics Remove obsolete comments about functional dependencies 2017-07-26 11:40:39 -04:00
storage Initialize replication_slot_catalog_xmin in procarray 2017-08-15 21:05:21 -04:00
tcop Remove uses of "slave" in replication contexts 2017-08-10 22:55:41 -04:00
tsearch Improve make_tsvector() to handle empty input, and simplify its callers. 2017-07-18 13:13:47 -04:00
utils Fix up some misusage of appendStringInfo() and friends 2017-08-15 23:34:39 -04:00
.gitignore Add .gitignore entries for AIX-specific intermediate build artifacts. 2015-07-08 20:44:22 -04:00
common.mk Add ICU_CFLAGS to global CPPFLAGS 2017-06-12 15:57:22 -04:00
Makefile Implement multivariate n-distinct coefficients 2017-03-24 14:06:10 -03:00
nls.mk Translation updates 2017-05-15 12:19:54 -04:00