Re: High CPU usage on reading single row with Set column with short TTL

2019-01-28 Thread Jeff Jirsa
Probably lowest effort is to run the select with tracing enabled - may give some easy hints -- Jeff Jirsa > On Jan 28, 2019, at 7:54 AM, Jonathan Haddad wrote: > > Your fastest route might be to run a profiler on Cassandra and get some flame > graphs. I'm a fan of the async-profiler: > >

Re: High CPU usage on reading single row with Set column with short TTL

2019-01-28 Thread Jonathan Haddad
Your fastest route might be to run a profiler on Cassandra and get some flame graphs. I'm a fan of the async-profiler: https://github.com/jvm-profiling-tools/async-profiler Joey Lynch did a nice write up in the documentation on a different process, which I haven't used yet: http://cassandra.apa

High CPU usage on reading single row with Set column with short TTL

2019-01-28 Thread Tom Wollert
Hello, We have noticed CPU usage spike after several minutes of consistent load when querying: - a single column of set type (same partition key) - relatively frequently (couple hundred times per second, for comparison, we do an order of magnitude more reads already with much bigger payloads) - wi