: Elliott Sims
To : Date : Fri, 07 Sep
2018 08:05:27 +0430 Subject : Re: Cluster CPU usage limit
Forwarded message It's interesting and a bit surprising that 256
write threads isn't enough. Even with a lot of cores, I'd expect you to be
able to saturate CPU
It's interesting and a bit surprising that 256 write threads isn't enough.
Even with a lot of cores, I'd expect you to be able to saturate CPU with
that many threads. I'd make sure you don't have other bottlenecks, like
GC, IOPs, network, or "microbursts" where your load is actually fluctuating
IMHO, Cassandra write is more of a CPU bound task, so while determining cluster
write throughput, what CPU usage percent (avg among all cluster nodes) should
be determined as limit? Rephrase: what's the normal CPU usage in Cassandra
cluster (while no compaction, streaming or heavy-read
