Thanks, Ross, JohnS and Lamar for your kind responses. It turned out my friend is using 7200 RPM disk for his write-lots-of-little-files activity so we're looking at upgrading that to 15000 RPM or getting him a FusionIO memory card.
Thank you!
Aleksey
On Wed, Oct 20, 2010 at 2:50 PM, Lamar Owen lowen@pari.edu wrote:
On Monday, October 18, 2010 09:25:41 pm Aleksey Tsalolikhin wrote:
Hi. A friend of mine was doing real-time video decoding on Fedora Core 13 and he had a performance glitch (1/2 a second freeze) every 5-10 seconds. "top" showed flush-253:0 process at the moment of the freeze.
[snip]
He also tried CentOS 5.5, and saw a "pdflush" process popping up with the same frequency, and resulting in a similar glitch.
Any other suggestions?
What kind of hard drive is this? How is/are your drive(s) set up?
You need the iostat program (in the sysstat package, I think) to give you more detail; there are some pointers to its use in this list's archives. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos