Springboot-Tomcat配置解析

Springboot-Tomcat配置解析

SpringBoot版本：2.2.2.RELEASE

server:
  tomcat:
    max-connections: 10000
    max-threads: 200
    accept-count: 100
    min-spare-threads: 10
    connection-timeout: 30s

max-connections

/**
 * Maximum number of connections that the server accepts and processes at any
 * given time. Once the limit has been reached, the operating system may still
 * accept connections based on the "acceptCount" property.
 */

• tomcat可建立的最大连接数，超过则放入accept-count队列中。默认10000

accept-count

/**
 * Maximum queue length for incoming connection requests when all possible request
 * processing threads are in use.
 */

• 超过max-connections的连接请求放入队列

max-threads

/**
 * Maximum amount of worker threads.
 */

• 最大工作线程数。默认200。
  • BIO模式。一个线程处理一个连接
  • NIO模式。一个线程处理多个连接

min-spare-threads

/**
 * Minimum amount of worker threads.
 */

• 最小工作线程数。默认10

connection-timeout

/**
 * Amount of time the connector will wait, after accepting a connection, for the
 * request URI line to be presented.
 */

• 实际设置的是socket_timeout。socket调用read()方法阻塞不超过这个时间，否则报java.net.SocketTimeoutException。不设置时，默认为60000ms

总结：

• 线程并不是越多越好，需要考虑上下文切换CPU的消耗，CPU时间片分配变少

参考：

Spring Boot 默认支持的并发量