What version of C* are you running? any special settings in cassandra.yaml; are you running with stock GC settings in cassandra-env.sh? what JDK/OS?
> On Oct 19, 2015, at 11:40 PM, 曹志富 <cao.zh...@gmail.com> wrote: > > INFO [Service Thread] 2015-10-20 10:42:47,854 GCInspector.java:252 - ParNew > GC in 476ms. CMS Old Gen: 4288526240 -> 4725514832; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:42:50,870 GCInspector.java:252 - ParNew > GC in 423ms. CMS Old Gen: 4725514832 -> 5114687560; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:42:53,847 GCInspector.java:252 - ParNew > GC in 406ms. CMS Old Gen: 5114688368 -> 5513119264; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:42:57,118 GCInspector.java:252 - ParNew > GC in 421ms. CMS Old Gen: 5513119264 -> 5926324736; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:00,041 GCInspector.java:252 - ParNew > GC in 437ms. CMS Old Gen: 5926324736 -> 6324793584; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:03,029 GCInspector.java:252 - ParNew > GC in 429ms. CMS Old Gen: 6324793584 -> 6693672608; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:05,566 GCInspector.java:252 - ParNew > GC in 339ms. CMS Old Gen: 6693672608 -> 6989128592; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:08,431 GCInspector.java:252 - ParNew > GC in 421ms. CMS Old Gen: 6266493464 -> 6662041272; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:11,131 GCInspector.java:252 - > ConcurrentMarkSweep GC in 215ms. CMS Old Gen: 5926324736 -> 4574418480; CMS > Perm Gen: 33751256 -> 33751192 > ; Par Eden Space: 7192 -> 611360336; > INFO [Service Thread] 2015-10-20 10:43:11,848 GCInspector.java:252 - ParNew > GC in 511ms. CMS Old Gen: 4574418480 -> 4996166672; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:14,915 GCInspector.java:252 - ParNew > GC in 395ms. CMS Old Gen: 4996167912 -> 5380926744; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:18,335 GCInspector.java:252 - ParNew > GC in 432ms. CMS Old Gen: 5380926744 -> 5811659120; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:21,492 GCInspector.java:252 - ParNew > GC in 439ms. CMS Old Gen: 5811659120 -> 6270861936; Par Eden Space: > 671088640 -> 0; > INFO [Service Thread] 2015-10-20 10:43:24,698 GCInspector.java:252 - ParNew > GC in 490ms. CMS Old Gen: 6270861936 -> 6668734208; Par Eden Space: > 671088640 -> 0; Par Survivor Sp > ace: 83886080 -> 83886072 > INFO [Service Thread] 2015-10-20 10:43:27,963 GCInspector.java:252 - ParNew > GC in 457ms. CMS Old Gen: 6668734208 -> 7072885208; Par Eden Space: > 671088640 -> 0; Par Survivor Sp > ace: 83886072 -> 83886080 > > after seconds node mark down. > > My node config is : 8GB heap NEW_HEAP size is 800MB > > NODE hardware is :4CORE 32GBRAM > > -------------------------------------- > Ranger Tsao
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