Just caught up on this thread - I currently have the same problem on a Duron 900 with a Gigabyte 7VAX (or similar) motherboard. We've had a number of problems with this system before, but to date they were all fixed by increasing the available shared memory (echo $BIGNUM > /proc/sys/kernel/shmall).
We're on a bog standard IDE drive. I've not yet run so many tests, but will advise of results shortly. -- Posted via http://dbforums.com ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match