Weblux default IO threads

webflux Default io Number of threads

webflux Used at the bottom reactor-netty, The number of threads used by default is netty server Default quantity at startup , namely cup Check the number * 2

Runtime.getRuntime().availableProcessors()

How to be in boot Application settings weblfux io Number of threads

stay weblfux in , Handle external requests The thread used is called reactor-http-xxx

These parameters can be used to configure

• react.netty.ioWorkerCount ( namely reactor-http Number of threads )
• react.netty.ioSelectCount
• react.netty.pool.maxConnections

It can be set like this

        System.setProperty("reactor.netty.ioWorkerCount","50");

When these threads are blocked , The server cannot handle more external requests , There will be a false death state , In particular, pay attention to setting the timeout for calling external requests in the calling service , Otherwise, there is a high probability that the worker thread will be blocked , Such as httpclient To set the timeout , webclient call block Method must set the timeout time ！！