On Tue, Aug 13, 2013 at 5:04 PM, Jens Himmelreich <[email protected]> wrote: > > Am Montag, 12. August 2013 19:03:27 UTC+2 schrieb Ben Noordhuis: >> >> On Mon, Aug 12, 2013 at 6:05 PM, Jens Himmelreich >> <[email protected]> wrote: >> > Hi, >> > >> > I have a node-server between an nginx-webserver (static content) and an >> > varnish. >> > Behind the varnish are two application-server for search and >> > cart-hosting. >> > The >> > node-machine has 4 cores. Every machine has load 0.1 except the >> > node-machine. >> > It has a load of 4.0. The node-application is an express-application >> > running >> > in >> > a node-cluster with 4 workers. http.globalAgent.maxSockets is set to >> > 400. >> > Does anyone know why the load is high? >> >> Because it's doing a lot? Your post is too light on details to really >> make informed suggestions. Try profiling your application to see >> where it's spending its time. > > > I see. I had to do a profiling. It's a little bit complecated, because we > use > coffeescript. The --nodejs --prof Parameters won't went to the workers.
--prof works with the cluster module, that's something I fixed a while ago. If you're running v0.10 or v0.11, node.js writes out <n> v8-%p.log files, where <n> is the number of workers and %p the worker's PID. > The global coffee is used, which I could instrument. I tried it without > the cluster - to get a quick result for --prof - and I see that the load > is going to 0.02. So it seems to be a problem of the cluster. > > (I know, I will do the profiling.) Are there experiences with a cluster- > load which rise to 1 per cpu? Usually when people see spikes like that with the cluster module, it's because they're sending huge messages between processes. `process.send(msg)` serializes `msg` to JSON, then deserializes it again on the other end. If msg is a big array or object, that consumes lots of memory and CPU time. > best regards > jens -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
