Hi Tony,
On 01.02.2017 18:42, REIX, Tony wrote:
Hi Konstantin
XLC.
I'm on AIX 7.1 for now.
I'm using this version of XLC v13:
# xlc -qversion
IBM XL C/C++ for AIX, V13.1.3 (5725-C72, 5765-J07)
Version: 13.01.0003.0003
With this version, I have (at least, since I tested with "check" and not "check-world" at that time) 2 failing tests: create_aggregate , aggregates .
With the following XLC v12 version, I have NO test failure:
# /usr/vac/bin/xlc -qversion
IBM XL C/C++ for AIX, V12.1 (5765-J02, 5725-C72)
Version: 12.01.0000.0016
So maybe you are not using XLC v13.1.3.3, rather another sub-version. Unless you are using more options for the configure ?
Configure.
What are the options that you give to the configure ?
export CC="/opt/IBM/xlc/13.1.3/bin/xlc"
export CFLAGS="-qarch=pwr8 -qtune=pwr8 -O2 -qalign=natural -q64 "
export LDFLAGS="-Wl,-bbigtoc,-b64"
export AR="/usr/bin/ar -X64"
export LD="/usr/bin/ld -b64 "
export NM="/usr/bin/nm -X64"
./configure --prefix="/opt/postgresql/xlc-debug/9.6"
Hard load & 64 cores ? OK. That clearly explains why I do not see this issue.
pgbench ? I wanted to run it. However, I'm still looking where to get it plus a guide for using it for testing.
pgbench is part of Postgres distributive (src/bin/pgbench)
I would add such tests when building my PostgreSQL RPMs on AIX. So any help is welcome !
Performance.
- Also, I'd like to compare PostgreSQL performance on AIX vs Linux/PPC64. Any idea how I should proceed ? Any PostgreSQL performance benchmark that I could find and use ? pgbench ?
pgbench is most widely used tool simulating OLTP workload. Certainly it is quite primitive and its results are rather artificial. TPC-C seems to be better choice.
But the best case is to implement your own benchmark simulating actual workload of your real application.
- I'm interested in any information for improving the performance & quality of my PostgreSQM RPMs on AIX. (As I already said, BullFreeware RPMs for AIX are free and can be used by anyone, like Perzl RPMs are. My company (ATOS/Bull) sells IBM Power machines under the Escala brand since ages (25 years this year)).
How to help ?
How could I help for improving the quality and performance of PostgreSQL on AIX ?
We still have one open issue at AIX: see
https://www.mail-archive.com/pgsql-hackers@postgresql.org/msg303094.html It will be great if you can somehow help to fix this problem.
--
Konstantin Knizhnik
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company