Can you quantify "major"? Latency or throughput? GC pauses? What did you see before? What do you see now? Do you have a stack dump?
-- Jeff Jirsa > On Feb 1, 2017, at 4:23 PM, Shashank Joshi <shashank.jo...@ericsson.com> > wrote: > > We are seeing major performance issues with about 100 GB of data in > 3.0.9-E001. The exact same app runs very well in 2.1. > > > > It feels to us like something is wrong with our configuration because of the > severity of the issues. Thanks in advance for any recommendations or > suggestions. > > > > Details: > > Size of data: 100 GB+ all in one table, with a simple schema, couple of > bigints and a double > > Cluster: 3 nodes with RF of 3 > > Client: App uses read and write CL of QUORUM and we have a lots of timeouts > due to inability to reach quorum > > Compaction: Leveled > > Nature of data usage: No updates/deletes, High reads, relatively low writes > > > > > > JVM: > > Using CMS GC and around 8 GB of max heap >
