Ankit, are the instance types identical in the new cluster, with I/O configuration identical at the system level, and are the Java settings for C* identical between the two clusters? With radical timing differences happening periodically, the two things I’d have on my radar would be garbage collections and problems in flushing dirty pages. Even if neither of those are the issue, one way or another, timeouts make me hunt for the resource everybody is queued up on.
From: Erick Ramirez <flightc...@gmail.com> Reply-To: "user@cassandra.apache.org" <user@cassandra.apache.org> Date: Thursday, February 6, 2020 at 10:08 PM To: "user@cassandra.apache.org" <user@cassandra.apache.org> Subject: Re: Query timeouts after Cassandra Migration Message from External Sender So do you advise copying tokens in such cases ? What procedure is advisable ? Specifically for your case with 3 nodes + RF=3, it won't make a difference so leave it as it is. Latency increased on target cluster. Have you tried to run a trace of the queries which are slow? It will help you identify where the slowness is coming from. Cheers!
