Re: Dropped mutations

2019-07-28 Thread Ayub M
What does Read and _Trace dropped mutations mean? There is no tracing enabled on any node in the cluster, what are these _TRACE dropped messages? INFO [ScheduledTasks:1] 2019-07-25 21:17:13,878 MessagingService.java:1281 - READ messages were dropped in last 5000 ms: 1 internal and 0 cross node. M

Re: Cheat Sheet for Unix based OS, Performance troubleshooting

2019-07-28 Thread Jon Haddad
http://www.brendangregg.com/linuxperf.html On Sat, Jul 27, 2019 at 2:45 AM Paul Chandler wrote: > I have always found Amy's Cassandra 2.1 tuning guide great for the Linux > performance tuning: > https://tobert.github.io/pages/als-cassandra-21-tuning-guide.html > > Sent from my iPhone > > On 26 J

RMI TCP Connection threads

2019-07-28 Thread Vlad
Hi, suddenly I noticed that one of three nodes started consume CPU in RMI TCP Connection threads. What it could be? Thanks.

Re: RMI TCP Connection threads

2019-07-28 Thread Jeff Jirsa
Someone running nodetool or exporting metrics via JMX are the two mostly likely explanations > On Jul 28, 2019, at 10:57 PM, Vlad wrote: > > Hi, > > suddenly I noticed that one of three nodes started consume CPU in RMI TCP > Connection threads. > > What it could be? > > Thanks.

Re: RMI TCP Connection threads

2019-07-28 Thread Dinesh Joshi
Try obtaining a thread dump. It will help debug. Anything that goes via JMX such as nodetool could be responsible for it. Dinesh > On Jul 28, 2019, at 10:57 PM, Vlad > wrote: > > Hi, > > suddenly I noticed that one of three nodes started consume CPU in RMI