perf[net]: 优化boss group线程池数量

net/src/main/java/com/zfoo/net/core/AbstractServer.java

@@ -68,9 +68,10 @@ public abstract class AbstractServer implements IServer {
 
     protected synchronized void doStart(ChannelInitializer<? extends Channel> channelChannelInitializer) {
         var cpuNum = Runtime.getRuntime().availableProcessors();
+        // 一条线程持有一个端口对应的selector，如果我们启动不仅仅是一个服务器端口的话，为了更好的性能需要修改对应的bossGroup数量
         bossGroup = Epoll.isAvailable()
-                ? new EpollEventLoopGroup(Math.max(1, cpuNum / 4), new DefaultThreadFactory("netty-boss", true))
-                : new NioEventLoopGroup(Math.max(1, cpuNum / 4), new DefaultThreadFactory("netty-boss", true));
+                ? new EpollEventLoopGroup(Math.max(1, cpuNum / 8), new DefaultThreadFactory("netty-boss", true))
+                : new NioEventLoopGroup(Math.max(1, cpuNum / 8), new DefaultThreadFactory("netty-boss", true));
 
         workerGroup = Epoll.isAvailable()
                 ? new EpollEventLoopGroup(cpuNum * 2, new DefaultThreadFactory("netty-worker", true))