gc throughput

2021-11-14 Thread onmstester onmstester
Hi, We are using Apache Cassandra 3.11.2 with its default gc configuration (CMS and ...) on a 16GB heap, i inspected gc logs using gcviewer and it reported 92% of throughput, is that means not necessary to do any further tuning for gc? and everything is ok with gc of Cassandra? Sent using

Separating storage and processing

2021-11-14 Thread onmstester onmstester
Hi, In our Cassandra cluster, because of big rows in input data/data model with TTL of several months, we ended up using almost 80% of storage (5TB per node), but having less than 20% of CPU usage which almost all of it would be writing rows to memtables and compacting sstables, so a lot of CP