I'm assuming that p99 that Rocksandra tries to target is caused by GC pauses, does anyone have data patterns or datasets that will generate GC pauses in Cassandra to highlight the abilities of Rocksandra (and... Scylla?) and perhaps this GC approach?
On Thu, Aug 30, 2018 at 8:11 PM Carl Mueller <carl.muel...@smartthings.com> wrote: > Oh nice, I'll check that out. > > On Thu, Aug 30, 2018 at 11:07 AM Jonathan Haddad <j...@jonhaddad.com> > wrote: > >> Advertised, yes, but so far I haven't found it to be any better than >> ParNew + CMS or G1 in the performance tests I did when writing >> http://thelastpickle.com/blog/2018/08/16/java11.html. >> >> That said, I didn't try it with a huge heap (i think it was 16 or 24GB), >> so >> maybe it'll do better if I throw 50 GB RAM at it. >> >> >> >> On Thu, Aug 30, 2018 at 8:42 AM Carl Mueller >> <carl.muel...@smartthings.com.invalid> wrote: >> >> > https://www.opsian.com/blog/javas-new-zgc-is-very-exciting/ >> > >> > .. max of 4ms for stop the world, large terabyte heaps, seems promising. >> > >> > Will this be a major boon to cassandra p99 times? Anyone know the >> aspects >> > of cassandra that cause the most churn and lead to StopTheWorld GC? I >> was >> > under the impression that bloom filters, caches, etc are statically >> > allocated at startup. >> > >> >> >> -- >> Jon Haddad >> http://www.rustyrazorblade.com >> twitter: rustyrazorblade >> >
