Are you running any nodetool commands during that period? IIRC, this is a log entry emitted by the BufferPool. It may be harm unless it's happening very often or logging a OOM. Dinesh
On Wednesday, February 6, 2019, 6:19:42 AM PST, Rahul Reddy <rahulreddy1...@gmail.com> wrote: Hello, I see maximum memory usage alerts in my system.log couple of times in a day as INFO. So far I haven't seen any issue with db. Why those messages are logged in system.log do we have any impact for reads/writes with those warnings? And what nerd to be looked INFO [RMI TCP Connection(170917)-127.0.0.1] 2019-02-05 23:15:47,408 NoSpamLogger.java:91 - Maximum memory usage reached (512.000MiB), cannot allocate chunk of 1.000MiB Thanks in advance