First, note that this is a *max* pool size. There is no "right" number. 42+2n was "a lot" (and sometimes too many). 8 is "less" and a reasonable number for 2-8 core machines common in servers. More important is that it's now configurable to a number that's good for you.
On Wednesday, June 22, 2016 at 4:14:15 PM UTC-5, Daniel Compton wrote: > > Bumping this too. What was the context for this change? I don’t see any > JIRA tickets linked in the commits > <https://github.com/clojure/core.async/compare/07e70e47a0d2f3f6b606fe2ed3a993b83cf2c29f...503b597a46a49f7d86cfb9afbe1d92798de8e2fa> > with > a rationale for why 8 was picked as the thread pool size. This has the > potential for breaking or reducing efficiency for apps that were relying on > the 42 + 2 * cores behaviour. I’m happy that this is now configurable, but > puzzled as to why the default wasn’t kept as 42 + 2 * cores? > > Also, because this needs to be passed as a java property, if we want our > applications to be able to handle differing core counts (e.g. running on > heterogenous servers) it seems like we will need to write a bash script to > calculate our threadpool size before starting up. > > Perhaps I’m missing something really obvious here, if so, please let me > know :) > > Tim Ewald, can you help with this? > > On Tue, Jun 14, 2016 at 9:10 AM Fluid Dynamics <a2093...@trbvm.com> wrote: > >> On Monday, June 13, 2016 at 4:14:25 PM UTC-4, Alex Miller wrote: >>> >>> core.async 0.2.382 is now available. >>> >>> Try it via: [org.clojure/core.async "0.2.382"] >>> >>> 0.2.382 includes the following changes: >>> >>> - Change default dispatch thread pool max size to 8. >>> - Add Java system property clojure.core.async.pool-size to override the >>> dispatch thread pool max size >>> >> >> Why 8, rather than, say, (.availableProcessors (Runtime/getRuntime))? >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clojure@googlegroups.com >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > -- > — > Daniel > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
