| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Avoid SnapshotResetXmin() during AtEOXact_Snapshot() |
| Date: | 2017-03-24 14:23:02 |
| Message-ID: | E1crQ7K-00085S-3B@gemulon.postgresql.org |
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| Lists: | pgsql-committers pgsql-hackers |
Avoid SnapshotResetXmin() during AtEOXact_Snapshot()
For normal commits and aborts we already reset PgXact->xmin
Avoiding touching highly contented shmem improves concurrent
performance.
Simon Riggs
Discussion: CANP8+jJdXE9b+b9F8CQT-LuxxO0PBCB-SZFfMVAdp+akqo4zfg(at)mail(dot)gmail(dot)com
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/42b4b0b2413b9b472aaf2112a3bbfd80a6ab4dc5
Modified Files
--------------
src/backend/access/transam/xact.c | 6 +++---
src/backend/utils/time/snapmgr.c | 21 ++++++++++++++++++---
src/include/utils/snapmgr.h | 2 +-
3 files changed, 22 insertions(+), 7 deletions(-)
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