How is your Percent Repaired when you run " nodetool info" ? Search for : "reduced num_token = improved performance ??" topic. The people were discussing that.
How is your compaction is configured? Could you run the same process in command line to have a measurement? Thanks, Petrus Silva On Thu, Jul 13, 2017 at 7:49 AM, Felipe Esteves < felipe.este...@b2wdigital.com> wrote: > Hi, > > I have a Cassandra 2.1 cluster running on AWS that receives high read > loads, jumping from 100k requests to 400k requests, for example. Then it > normalizes and later cames another high throughput. > > To the application, it appears that Cassandra is slow. However, cpu and > disk use is ok in every instance, row cache is enabled and with almost 100% > hit rate. > > The logs from Cassandra instances doesn't have any errors, nor tombstone > messages or something liked that. It's mostly compactions and G1GC > operations. > > Any hints on where to investigate more? > > > Felipe Esteves > > > > >
