This is better kept to the User groups. What are your JVM memory settings for Cassandra, and have you seen big GC's in your logs?
The reason I ask is because that's a large number of column families, which produces memory pressure, and at first blush that strikes me as a likely cause. On Wed, Jun 15, 2016 at 3:23 AM Varun Barala <varunbaral...@gmail.com> wrote: > Hi all, > > Can anyone tell me that what are all possible reasons for below log:- > > > *"INFO [ScheduledTasks:1] 2016-06-14 06:27:39,498 > MessagingService.java:929 - _TRACE messages were dropped in last 5000 ms: > 928 for internal timeout and 0 for cross node timeout".* > I searched online for the same and found some reasons like:- > > * Disk is not able to keep up with your ingest > * Resources are not able to support all parallel running tasks > * If other nodes are down then due to large hint replay > * Heavy workload > > But in this case other kind of messages (mutation, read, write etc) > should be dropped by *C** but It doesn't happen. > > ----------------------------- > Cluster Specifications > ------------------------------ > number of nodes = 1 > total number of CF = 2000 > > ----------------------------- > Machine Specifications > ------------------------------ > RAM 30 GB > hard disk SSD > ubuntu 14.04 > > > Thanks in advance!! > > Regards, > Varun Barala >
