An if you have 10 nodes, do all of them happen to send hints to the two with GC?
Terje On Thu, May 12, 2011 at 6:10 PM, Terje Marthinussen <tmarthinus...@gmail.com > wrote: > Just out of curiosity is this on the receiver or sender side? > > I have been wondering a bit if the hint playback could need some > adjustment. > There is potentially quite big differences on how much is sent per throttle > delay time depending on what your data looks like. > > Early 0.7 releases also built up hints very easily under load due to nodes > quickly getting marked as down due to gossip sharing the same thread as many > other operations. > > Terje > > On Thu, May 12, 2011 at 1:28 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > >> Doesn't really look abnormal to me for a heavy write load situation >> which is what "receiving hints" is. >> >> On Wed, May 11, 2011 at 1:55 PM, Gabriel Tataranu <gabr...@wajam.com> >> wrote: >> > Greetings, >> > >> > I'm experiencing some issues with 2 nodes (out of more than 10). Right >> > after startup (Listening for thrift clients...) the nodes will create >> > objects at high rate using all available CPU cores: >> > >> > INFO 18:13:15,350 GC for PS Scavenge: 292 ms, 494902976 reclaimed >> > leaving 2024909864 used; max is 6658457600 >> > INFO 18:13:20,393 GC for PS Scavenge: 252 ms, 478691280 reclaimed >> > leaving 2184252600 used; max is 6658457600 >> > .... >> > INFO 18:15:23,909 GC for PS Scavenge: 283 ms, 452943472 reclaimed >> > leaving 5523891120 used; max is 6658457600 >> > INFO 18:15:24,912 GC for PS Scavenge: 273 ms, 466157568 reclaimed >> > leaving 5594606128 used; max is 6658457600 >> > >> > This will eventually trigger old-gen GC and then the process repeats >> > until hinted handoff finishes. >> > >> > The build version was updated from 0.7.2 to 0.7.5 but the behavior was >> > exactly the same. >> > >> > Thank you. >> > >> > >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of DataStax, the source for professional Cassandra support >> http://www.datastax.com >> > >
