On Fri, Oct 25, 2013 at 8:29 AM, Rahila Syed <rahilasyed90@xxxxxxxxx> wrote: > Hello All, > > I am using jdbcrunner-1.2 to run PostgreSQL performance tests. For > certain tests, i need to increase the CPU usage of the servers > especially at user level. > I tried using both tpcc and tpcb load with scale factor of 100. Even > after setting the number of client connections as high as 420, I am > unable to achieve high CPU usage. It is hardly 3 percent. I think this > is because most of the client connections are idle. > The tpcc and tpcb transactions seem to be consuming very less CPU. > > In postgresql.conf file, I have lowered checkpoint segments to 1 in > order to overwhelm the server with checkpoints but no significant > increase in iowait of the CPU. > > Can somebody suggest a better idea to load PostgreSQL servers to > increase CPU usage.? > > Configurations of my machine is: > > Processors: Xeon E5-2650 Processor Kit > Intel® Xeon ® Processor E5-2650 (2 GHz, 8C/16T, > 20 MB) * 2 nos > > > RAM : 32GB DDR3-1600 REG Memory Kit > 8x 4GB Registered ECC DIMM, DDR3L-1600(PC3L-12800) > > HDD: 450GB 10K Hot Plug 2.5-inch SAS HDD * 8 nos > 1 x 450 GB SAS HDD, 2.5-inch, 6Gb/s > > Disk Speed : 10,000 RPM > > RAID Controller (512MB, RAID 0/1) My guess is that you're maxing out your IO subsystem long before you're maxing out CPU. What does iostat -xd 10 have to say about it? To understand recursion, one must first understand recursion. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
