Thanks ZAIDI, The problem is the tracing queries are also getting timed out, so not sure how to troubleshoot.
Does increasing new_heap will help reads ?? what other param's i can tune, so that i can identify the issue. Thanks Pranay. On Fri, Jul 7, 2017 at 10:45 AM, ZAIDI, ASAD A <az1...@att.com> wrote: > >> I analysed the GC logs not having any issues with major GC's > > If you don’t have issues on GC , than why do you want to > [tune] GC parameters ? > > Instead focus on why select queries are taking time.. may be take a look > on their trace? > > > > > > *From:* Pranay akula [mailto:pranay.akula2...@gmail.com] > *Sent:* Friday, July 07, 2017 9:27 AM > *To:* user@cassandra.apache.org > *Subject:* READ Queries timing out. > > > > Lately i am seeing some select queries timing out, data modelling to blame > for but not in a situation to redo it. > > > > Does increasing heap will help ?? > > > > currently using 1GB new_heap, I analysed the GC logs not having any issues > with major GC's . > > > > Using G1GC , does increasing new_heap will help ?? > > > > currently using JVM_OPTS="$JVM_OPTS -XX:MaxGCPauseMillis=500", even if i > increase heap to lets say 2GB is that effective b/c young GC's will kick in > more frequently to complete in 500ms right ?? > > > > > > Thanks > > Pranay. >
