[nodejs] Noe.js cluster master at 100% CPU

On Tue, Sep 18, 2012 at 1:27 PM, Michael wrote:
hi,

I am playing a bit with JMeter to produce some load on my Node.js system
(HTTP requests). I recognized, that under heavy load my master node process
in the cluster is using 100% CPU and will never stop doing so even if no
requests are arriving.I attached a screenshot... This was the situation some
minutes after the load. The whole system was relaxed again expect the master
in the cluster.

My cluster is build like the example here
http://nodejs.org/api/cluster.html#cluster_cluster So there is nothing than
master.fork() in master's code.

Any ideas what makes the master process busy? The application still respond
very fast in the 100% CPU master situation.

Regards,

Michael

wrote:
On Tue, Sep 18, 2012 at 1:27 PM, Michael <[email protected]<javascript:>>
wrote:
Trace the program with strace on Linux or truss / dtruss if you're on
a BSD or Solaris system, that should give you a hint what the process
is doing. In case of doubt, post the trace output.

Another option is to turn on profiling with --prof and inspect the
call graph. `npm install profiler` will give you a nprof tool that
parses the v8.log into human-readable form.

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And btw, what node.js version are you using?