Note that other things use RRDs too (eg, mrtg), but ganglia in particular seems to be very efficient at generating RRDs. :) John On Tue, Jun 05, 2012 at 02:11:24PM -0500, Schmitz, Corby B. wrote:
No ganglia on watcher today.
-- corby
On 6/5/12 1:55 PM, "Stacey, Craig J." <[email protected]> wrote:
Right now, IIRC, the only things watcher is watching is temperature and power (which don't use Ganglia, I believe). Is it doing anything else that uses Ganglia? -- Craig
On Jun 5, 2012, at 1:54 PM, Ken Raffenetti wrote:
This is a likely cause. Once we get watcher sectioned off we can experiment with this.
Ken Raffenetti Systems Administration Associate MCS Division - Argonne National Laboratory
On 06/05/2012 01:49 PM, John Valdes wrote:
On Tue, Jun 05, 2012 at 01:19:06PM -0500, Ken Raffenetti wrote:
watcher is thrashing the disk on this hypervisor. That's what's causing variant to go into IO wait and spike load.
Is watcher writing out of ton of Ganglia (or other) RRDs? If so, moving those to a tmpfs may make it happier. I had to do this w/ Ganglia on fusion, and the disk I/O dropped to nearly nothing as did the load.
http://www.mail-archive.com/[email protected]/msg030 60.html
John