Tomcat优化系列-配置tomcatThreadPool

Bertha 。 2023-06-16 04:58 14阅读 0赞

在tomcat中每一个用户请求都是一个线程，所以可以使用线程池提高性能。

## 配置线程池 ##

修改server.xm  
![在这里插入图片描述][201911241858208.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA2MjMzOQ_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][20191124185850955.png]

## 参数说明 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA2MjMzOQ_size_16_color_FFFFFF_t_70 1]

### threadPriority （优先级） ###

(int) The thread priority for threads in the executor, the default is 5 (the value of theThread.NORM\_PRIORITY constant)

### daemon（守护进程） ###

(boolean) Whether the threads should be daemon threads or not, the default is true

### namePrefix（名称前缀） ###

(String) The name prefix for each thread created by the executor. The thread name for an individual thread will be namePrefix+threadNumber

### maxThreads（最大线程数） ###

(int) The max number of active threads in this pool, default is 200

### minSpareThreads（最小活跃线程数） ###

(int) The minimum number of threads always kept alive, default is 25

### maxIdleTime（空闲线程等待时间） ###

(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)

### maxQueueSize（最大的等待队里数，超过则请求拒绝） ###

(int) The maximum number of runnable tasks that can queue up awaiting execution before we reject them. Default value is Integer.MAX\_VALUE

### prestartminSpareThreads（是否在启动时就生成minSpareThreads个线程） ###

(boolean) Whether minSpareThreads should be started when starting the Executor or not, the default is false

### threadRenewalDelay（重建线程的时间间隔） ###

(long) If a ThreadLocalLeakPreventionListener is configured, it will notify this executor about stopped contexts. After a context is stopped, threads in the pool are renewed. To avoid renewing all threads at the same time, this option sets a delay between renewal of any 2 threads. The value is in ms, default value is 1000 ms. If value is negative, threads are not renewed.  
。重建线程池内的线程时，为了避免线程同时重建，每隔threadRenewalDelay（单位： ms ）重建一个线程。默认值为1000 ，设置为负则不重建

## 配置例子 ##

![在这里插入图片描述][20191124190029665.png]

[201911241858208.png]: https://img-blog.csdnimg.cn/201911241858208.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA2MjMzOQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191124185840189.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA2MjMzOQ==,size_16,color_FFFFFF,t_70
[20191124185850955.png]: https://img-blog.csdnimg.cn/20191124185850955.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA2MjMzOQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191124190001989.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDA2MjMzOQ==,size_16,color_FFFFFF,t_70
[20191124190029665.png]: https://img-blog.csdnimg.cn/20191124190029665.png