[Swift-devel] Coaster CPU-time consumption issue

[Mihael Hategan]

On Mon, 2009-07-13 at 14:18 -0500, Michael Wilde wrote:
> On 7/13/09 2:06 PM, Mihael Hategan wrote:
> > A while ago I committed a patch to run the service process with a lower
> > priority. Is that in use?
> > 
> > Also, is logging reduced or is it the default?
> > 
> > Is the 97% CPU usage a spike, or does it stay there on average?
> 
> In the test I observed Sarah running last Thu, it stayed close to 100%
> during the whole run - many minutes, solid near-100% CPU. During that
> time a tail of the coaster log showed a burst of a few messages every
> few seconds - not intensive enough to explain the overhead as all due to
> logging.

Ok, that does look like a problem. I need to see the log from that.

In addition, when you observe this SPECIFIC behavior (solid near 100%
CPU, burst of a few messages every few seconds and not much else in the
logs), please do a jstack <pid> on the process in question and send the
output of that.