tomcat配置线程池

第一步，打开共享的线程池

<Service name="Catalina">
<!--The connectors can use a shared executor, you can define one or more named thread pools-->
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-" 
          maxThreads="1000" minSpareThreads="50" maxIdleTime="600000"/>

默认前后是注释<!-- -->掉的，去掉就可以了。其中

[color=blue]name[/color]
The name used to reference this pool in other places in server.xml. The name is required and must be unique.
这个是线程池的名字，必须唯一，我们在后面的配置里要用到这个东西

[color=blue]namePrefix[/color]
(String) The name prefix for each thread created by the executor. The thread name for an individual thread will be namePrefix+threadNumber
线程的名字前缀，用来标记线程名字的，这样每个线程就用这个前缀加上线程编号了，比如
catalina-exec-1
catalina-exec-2

[color=blue]maxThreads[/color]
(int) The max number of active threads in this pool, default is 200
允许的最大线程池里的线程数量，默认是200，大的并发应该设置的高一些，反正只是限制而已，不占用资源

[color=blue]minSpareThreads[/color]
(int) The minimum number of threads always kept alive, default is 25
最小的保持活跃的线程数量，默认是25.这个要根据负载情况自行调整了。太小了就影响反应速度，太大了白白占用资源。

[color=blue]maxIdleTime[/color]
(int) The number of milliseconds before an idle thread shutsdown, unless the number of active threads are less or equal to minSpareThreads. Default value is 60000(1 minute)
超过最小活跃线程数量的线程，如果空闲时间超过这个设置后，会被关别。默认是1分钟。

[color=blue]threadPriority[/color]
(int) The thread priority for threads in the executor, the default is Thread.NORM_PRIORITY
线程的等级。默认是Thread.NORM_PRIORITY


第二步
在 Connector里指定使用共享线程池

<Connector
          port="8009"
          protocol="AJP/1.3"
          maxThreads="5000"
          executor="tomcatThreadPool"

注意，一旦使用了线程池，则其它的线程属性，比如 maxThreads等将被忽略