On Thursday, March 1, 2012 11:50:21 PM UTC+1, Ben Noordhuis wrote: > > On Thu, Mar 1, 2012 at 22:16, Erik Dubbelboer <[email protected]> wrote: > > Hi Everyone, > > > > I was wondering what the status is for this API. I couldn't find > anything in > > the current documentation so I'm guessing it hasn't been implemented yet? > > > > If this is the case I guess I could take a look at it since it would > really > > be nice to have this for machines with a lot of cores in them. > > The relevant code moved out of node and into libuv (and it's something > of an implementation detail there, uv-win has its own thread pool). > > I'd be interested in benchmarks that show (or don't show as the case > may be) when the number of threads is a bottleneck and what the sweet > spot is. Farming out I/O to a thread pool definitely hurts performance > but there's not enough data to make reasoned guesses about the actual > impact or the best remedy. Is that something you feel like taking on? >
Calling eio_set_min_parallel() from a module still seems to work (only on unix I guess). What exactly has moved to libuv? I have thought about our problem and the 4 threads isn't really the issue. We used a mysql module that uses libmysql's mysql_query() which is a blocking call. So a couple of slow queries blocked our whole application. We have fixed this by moving to node-mysql which implements the mysql protocol in javascript and doesn't have this problem. So increasing the thread count would only delay the problem for us and won't really fix it. I think the biggest problem here is that this nodejs behaviour isn't documented all to well. I was always under the assumption that nodejs would automatically spawn more threads when needed. Obviously the mysql module developers that use libmysql's mysql_query() and the people that use these modules have no idea that this thread problem exists. Which makes me wonder how many more C modules there are that are doing blocking calls. -- 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
