Hello,
We are using Cassandra 2.1.13 with each node having a NVMe disk with the configuration of Total Capacity - 1.2TB, Alloted Capacity - 880GB. We would like to increase the default value of 32 for the param concurrent_reads. But the document says "(Default: 32)note For workloads with more data than can fit in memory, the bottleneck is reads fetching data from disk. Setting to (16 × number_of_drives) allows operations to queue low enough in the stack so that the OS and drives can reorder them. The default setting applies to both logical volume managed (LVM) and RAID drives." https://docs.datastax.com/en/cassandra/2.1/cassandra/configuration/configCassandra_yaml_r.html#reference_ds_qfg_n1r_1k__concurrent_reads According to this hardware specification, what could be the optimal value that can be set for concurrent_reads? Best Regards, Julian.
