AIX 5.3 Out of Memory Error - 64-bit

Hi All

I'm looking for some help with regards a postgres 64-bit install I set
up on a IBM AIX machine.

I used the following install options whien I installed postgres

BINDIR = /usr/local/pgsql837-64/bin

DOCDIR = /usr/local/pgsql837-64/doc

INCLUDEDIR = /usr/local/pgsql837-64/include

PKGINCLUDEDIR = /usr/local/pgsql837-64/include

INCLUDEDIR-SERVER = /usr/local/pgsql837-64/include/server

LIBDIR = /usr/local/pgsql837-64/lib

PKGLIBDIR = /usr/local/pgsql837-64/lib

LOCALEDIR =

MANDIR = /usr/local/pgsql837-64/man

SHAREDIR = /usr/local/pgsql837-64/share

SYSCONFDIR = /usr/local/pgsql837-64/etc

PGXS = /usr/local/pgsql837-64/lib/pgxs/src/makefiles/pgxs.mk

CONFIGURE = '--prefix=/usr/local/pgsql837-64' '--with-pgport=5422'
'--enable-thr
ead-safety' '--enable-integer-datetimes' 'CC=gcc -maix64'
'LDFLAGS=-Wl,-bbigtoc'
CC = gcc -maix64

CPPFLAGS =

CFLAGS = -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Winline
-Wdeclaration-a
fter-statement -Wendif-labels -fno-strict-aliasing -fwrapv

CFLAGS_SL =

LDFLAGS = -Wl,-bbigtoc
-Wl,-blibpath:/usr/local/pgsql837-64/lib:/usr/lib:/lib
LDFLAGS_SL = -Wl,-bnoentry -Wl,-H512 -Wl,-bM:SRE

LIBS = -lpgport -lz -lreadline -lld -lm

VERSION = PostgreSQL 8.3.7

And the spec of the AIX machine is a follows.

AIX 5.3
2x Power 5 CPU's
6GB RAM

If I run postgres with the standard postgresql.conf install then all
queries run (albiet sometimes slower than i'd expect). However if I
start to change some of the memory settings for example shared_buffers,
temp_buffers, work_mem, maintenance_workmem above 128-256MB and run a
large query or create a large indexes i get the error below

Out of Memory
Failed on request of size 167873 (this value will change)

Any thoughts or ideas would be greatly appreciated

Thanks
Fran

___________________________________________________

This email is intended for the named recipient. The information contained
in it is confidential. You should not copy it for any purposes, nor
disclose its contents to any other party. If you received this email
in error, please notify the sender immediately via email, and delete it from
your computer.

Any views or opinions presented are solely those of the author and do not
necessarily represent those of the company.

Cromwell Tools Limited, PO Box 14, 65 Chartwell Drive
Wigston, Leicester LE18 1AT. Tel 0116 2888000
Registered in England and Wales, Reg No 00986161
VAT GB 115 5713 87 900
__________________________________________________