RE: Random slow read times in Cassandra

2017-03-29 Thread Durity, Sean R
Does a later query on the same ID also behave poorly? (Or perhaps it gets cached and is fast the next time…) My first thought was that perhaps the slow records had many updates that were being read (or tombstones being read over) to assemble the record. A trace on the query with that key might r

Re: Random slow read times in Cassandra

2017-03-17 Thread daemeon reiydelle
check for level 2 (stop the world) garbage collections. *...* *Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872* On Fri, Mar 17, 2017 at 11:51 AM, Chuck Reynolds wrote: > I have a large Cassandra 2.1.13 ring (60 nodes) in AWS that has > consistently random high r

Re: Random slow read times in Cassandra

2017-03-17 Thread Jonathan Haddad
Probably Jvm pauses. Check your logs for long GC times. On Fri, Mar 17, 2017 at 11:51 AM Chuck Reynolds wrote: > I have a large Cassandra 2.1.13 ring (60 nodes) in AWS that has > consistently random high read times. In general most reads are under 10 > milliseconds but with in the 30 request the