PLEASE HELP ME OUT, I AM NOT ABLE TO PROCEED FROM 1 week...Load on cassandra :http://pastebin.com/DeShpHtPProblem :I have single node cassandra using CQL using datastax java driver 1.0.1 and cassandra verison 1.2.6.Hi All,
Infrastructure : 16GB machine with 8GB heap given to cassandra, i7 processor.. DEFAULT cassandra.yaml no change done by me.
-Xmx12G^ no other change in cassandra.bat
cassandra Freezes after some writes and i see no action on cassandra console for an hour...all Native_Transport threads are also killed....my program keeps running NO ERROR comes.......when i connect with cql that works........ In start it creates 16 NativeTransport threads and after 10-15 minutes Total threads goes to 128...Just before it hangs, With JCONSOLE when i see Native_Transport threads then i find most of them in state as :
i am running a usecase which stores Combinations(my project terminology) in cassandra....Currently testing storing 2.5 lakh combinations with 100 parallel threads..each thread storing one combination...real case i need to support of many CRORES but that would need different hardware and multi node cluster...
In Storing ONE combination takes around 2sec and involves :
527 INSERT INTO queries ....
506 UPDATE queries ....
954 SELECT queries ....
100 parallel threads parallely storing 100 combinations....MY CASSANDRA LOGS :
Please look last 100-200 lines of log because that is time it freezed