| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Reduce the number of pallocs() in BRIN |
| Date: | 2017-04-07 22:09:12 |
| Message-ID: | E1cwc48-0004mI-Nj@gemulon.postgresql.org |
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| Thread: | |
| Lists: | pgsql-committers |
Reduce the number of pallocs() in BRIN
Instead of allocating memory in brin_deform_tuple and brin_copy_tuple
over and over during a scan, allow reuse of previously allocated memory.
This is said to make for a measurable performance improvement.
Author: Jinyu Zhang, Álvaro Herrera
Reviewed by: Tomas Vondra
Discussion: https://postgr.es/m/495deb78.4186.1500dacaa63.Coremail.beijing_pg@163.com
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/8bf74967dab1b368f4e217c960ede1516c42a989
Modified Files
--------------
contrib/pageinspect/brinfuncs.c | 3 +-
src/backend/access/brin/brin.c | 24 +++++++----
src/backend/access/brin/brin_pageops.c | 4 +-
src/backend/access/brin/brin_tuple.c | 77 +++++++++++++++++++++-------------
src/include/access/brin_tuple.h | 12 ++++--
5 files changed, 78 insertions(+), 42 deletions(-)
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