On 2013-12-04 20:19:55 +0200, Metin Doslu wrote:
> - When we increased NUM_BUFFER_PARTITIONS to 1024, this problem is
> disappeared for 8 core machines and come back with 16 core machines on
> Amazon EC2. Would it be related with PostgreSQL locking mechanism?
You could try my lwlock-scalability improvement patches - for some
workloads here, the improvements have been rather noticeable. Which
version are you testing?
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services