Also using the latest version of the driver (1.0.7) is always a good idea just to make sure you are not hitting issues that have already been addressed.
On Thu, May 29, 2014 at 12:33 AM, Aaron Morton <aa...@thelastpickle.com> wrote: > You’ll need to provide some more information such as: > > * Do you have monitoring on the cassandra cluster that shows the request > latency ? Data Stax OpsCentre is good starting point. > > * Is compaction keeping up ? Check with nodetool compactionstats > > * Is the GCInspector logging about long running ParNew ? (it only logs > when it’s longer than 200ms) > > Cheers > Aaron > > > ----------------- > Aaron Morton > New Zealand > @aaronmorton > > Co-Founder & Principal Consultant > Apache Cassandra Consulting > http://www.thelastpickle.com > > On 23/05/2014, at 10:35 pm, Alexey Sverdelov < > alexey.sverde...@googlemail.com> wrote: > > Hi all, > > I've noticed increased latency on our tomcat REST-service (average 30ms, > max > 2sec). We are using Cassandra 1.2.16 with official DataStax Java > driver v1.0.3. > > Our setup: > > * 2 DCs > * each DC: 7 nodes > * RF=5 > * Leveled compaction > > After cassandra restart on all nodes, the latencies are alright again > (average < 5ms, max 50ms). > > Any thoughts are greatly appreciated. > > Thanks, > Alexey > > > -- :- a) Alex Popescu Sen. Product Manager @ DataStax @al3xandru
