From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
---|---|
To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql: Reduce spurious Hot Standby conflicts from never-visible records |
Date: | 2010-12-10 07:00:42 |
Message-ID: | E1PQwyA-0006L7-EO@gemulon.postgresql.org |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-committers pgsql-hackers |
Reduce spurious Hot Standby conflicts from never-visible records.
Hot Standby conflicts only with tuples that were visible at
some point. So ignore tuples from aborted transactions or for
tuples updated/deleted during the inserting transaction when
generating the conflict transaction ids.
Following detailed analysis and test case by Noah Misch.
Original report covered btree delete records, correctly observed
by Heikki Linnakangas that this applies to other cases also.
Fix covers all sources of cleanup records via common code.
Includes additional fix compared to commit on HEAD
Branch
------
REL9_0_STABLE
Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=a804a23e7af0e075b88e7b03bfd9b0f22d2657b2
Modified Files
--------------
src/backend/access/heap/heapam.c | 31 +++++++++++++++++++++++--------
src/backend/access/heap/pruneheap.c | 1 -
src/backend/access/nbtree/nbtxlog.c | 19 +++++--------------
3 files changed, 28 insertions(+), 23 deletions(-)
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2010-12-10 16:36:40 | pgsql: Fix efficiency problems in tuplestore_trim(). |
Previous Message | Tom Lane | 2010-12-09 18:04:55 | pgsql: Eliminate O(N^2) behavior in parallel restore with many blobs. |
From | Date | Subject | |
---|---|---|---|
Next Message | Dmitriy Igrishin | 2010-12-10 07:53:33 | Fwd: Extended query protocol and exact types matches. |
Previous Message | aaliya zarrin | 2010-12-10 06:51:23 | Re: To Signal The postmaster |