I have the following cluster configuration :
Master -3 node (4 cpu, 20 gb ram)
coordinating -3 node (16 cpu, 98 GB,)
data- 5 node (28 cpu, 48 RAM)
And thread pool configuration is following
We have some complex queries and there are regular updates on around 25% of data on the cluster.
I have observed that after the concurrency of approx 19k rpm, the cluster starts to reject the requests. I expect the traffic to increase further.
Please tell me what configuration changes can help me so that no requests are rejected with this cluster configuration.