Thanks Jean-Phillipe. JEP 345 - https://openjdk.java.net/jeps/345 has the answer. Currently only Parallel supports NUMA, and looking at this app, it's using CMS. Rather annoying that HotSpot doesn't warn about the combination, but there we go!
Thanks, Ben On Tue, 27 Aug 2019 at 14:25, Jean-Philippe BEMPEL <[email protected]> wrote: > > Hi Ben, > > Parallel GC supports Numa, but I'm not sure about G1! > > Cheers > > On Tuesday, August 27, 2019, Ben Evans <[email protected]> wrote: >> >> Hi, >> >> I've encountered an issue whereby, despite -XX:+UseNuma being >> explicitly set on the command line, the final flags list that is seen >> has it disabled. This is on OpenJDK 8u212. >> >> Has anyone encountered a runtime configuration or sequence of flags >> that will disable NUMA-awareness as a side-effect? >> >> I'll see if I can pull the exact startup flags as given and share them. >> >> Any pointers gratefully received. >> >> Thanks, >> >> Ben >> >> -- >> You received this message because you are subscribed to the Google Groups >> "mechanical-sympathy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/mechanical-sympathy/CABKW8Rh1Lp7emTS3V5Fe7Btat6QtfTjxnJwuqoLRkx0eX98Bmg%40mail.gmail.com. > > -- > You received this message because you are subscribed to the Google Groups > "mechanical-sympathy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/mechanical-sympathy/CALrzOLv2otRxHQMauN6pitry7hq5x6PgY8mJ0m%2BhntGAjOHS1g%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "mechanical-sympathy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/mechanical-sympathy/CABKW8Rj%3D6UX3vN3M1PxFVCnU3OKWgWocHoO3R3YEkV5GAe0ykw%40mail.gmail.com.
