Jetty server | default acceptors and selectors

 

If acceptor and selector threads are not defined in the config file, Jetty will calculate them using the following logic.

Acceptor thread calculation in Jetty

acceptors=Math.max(1, Math.min(4,cores/8))

Selector thread calculation in Jetty

int threads = ((ThreadPool.SizedThreadPool)executor).getMaxThreads(); int cpus = Runtime.getRuntime().availableProcessors(); selectors=Math.max(1,Math.min(cpus/2,threads/16));

Read more: https://support.sonatype.com/hc/en-us/articles/360000744687-Understanding-Eclipse-Jetty-9-4-Thread-Allocation