private class MyTomcatConnectorCustomizer implements TomcatConnectorCustomizer {
    @Override
	public void customize(Connector connector) {
        Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();
        protocol.setAcceptCount(333);
        protocol.setAcceptorThreadCount(2);
        protocol.setMaxThreads(99);
        protocol.setMinSpareThreads(7);
        protocol.setMaxConnections(999);
        protocol.setConnectionTimeout(19000);
    }
}

@Bean
public ConfigurableServletWebServerFactory createEmbeddedServletContainerFactory() {
    TomcatServletWebServerFactory tomcatFactory = new TomcatServletWebServerFactory();
    // tomcatFactory.setPort(8090);
    tomcatFactory.addConnectorCustomizers(new MyTomcatConnectorCustomizer());
    return tomcatFactory;
}


完整代码

https://gitee.com/dyyx/springboothello/blob/master/src/main/java/demo/config/TomcatConfig.java