tomcat 8 优化及 liunx tcp 连接优化

我就是我 2023-10-11 13:38 54阅读 0赞

liunx  tcp 优化：

[https://blog.51cto.com/jschu/1755279][https_blog.51cto.com_jschu_1755279]

web服务器和cache服务器，高并发下，socket最大连接数限制调整： 默认是1024，完全不够。

1，修改用户进程可打开最大文件数限制。

即时生效：ulimit -n xxx

永久生效：

echo "ulimit -HSn 65536" >> /etc/rc.local
    
    echo "ulimit -HSn 65536" >> /root/.bash_profile
    
    ulimit -HSn 65536

查看最大文件数：

ulimit -n

文件和线程数量修改

vi /etc/security/limits.conf
     
    #加入如下参数， 禁用内存交换必须设置的参数
    #nofile文件数
    #nproc 线程数
    es  soft  nofile  65536
    es  hard  nofile  65536
    es  soft  nproc  4096
    es  hard  nproc  4096
     
    * hard memlock unlimited
    * soft memlock unlimited
     
     
    或者
    *  soft  nofile  65536
    *  hard  nofile  65536
    *  soft  nproc  32000
    *  hard  nproc  32000
     
     
    * hard memlock unlimited
    * soft memlock unlimited

tomcat  8优化：

![20190925231829797.png][]

[https://www.cnblogs.com/laojiao/p/9575383.html][https_www.cnblogs.com_laojiao_p_9575383.html]

[https://www.cnblogs.com/shoufeng/p/9628798.html][https_www.cnblogs.com_shoufeng_p_9628798.html]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70 2][]

优化后的jvm监控美如画： cpu使用率从百分之60降到百分之20， 内存使用率及回收也降了百分之40.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70 3][]

[https_blog.51cto.com_jschu_1755279]: https://blog.51cto.com/jschu/1755279
[20190925231829797.png]: https://img-blog.csdnimg.cn/20190925231829797.png
[https_www.cnblogs.com_laojiao_p_9575383.html]: https://www.cnblogs.com/laojiao/p/9575383.html
[https_www.cnblogs.com_shoufeng_p_9628798.html]: https://www.cnblogs.com/shoufeng/p/9628798.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190925231703372.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20190925231737416.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20190925231805688.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20191008154706516.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3Rhbmdfamlhbl9kb25n,size_16,color_FFFFFF,t_70