我们服务器的配置情况如下 P4 3.6 内存 1G 硬盘 SCSI 140 G 分区情况 /boot(500M) /SWAP (2048M) /(剩余全部磁盘空间) 服务器是新的HP全新配置 服务器的WEB配置情况:红旗LINUX5.0服务亚洲版+TOMCAT5.5.17+MYSQL5.0.22+JDK1.5.0.6 TOMCAT和 MYSQL以及JD的安配置过程我就不说了
现在的问题是:开发组十几个人点击,频繁刷新(遨游浏览器有个自动刷新的功能^_^,我们每台机器开了网站上15个左右窗口,设置成每隔10秒自动刷新),结果不到十分钟就TOMCAT就宕机了 终端显示错误如下:
严重:All threads (150) are currently busy, waiting. Increase maxThreads (150) or check the servlet status
程序是用的Hibernate + Spring
Connector port="80" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" redirectPort="8443" acceptCount="100" debug="0" connectionTimeout="20000" disableUploadTimeout="true" />
我试图把maxThreads改为999
Connector port="80" maxThreads="999" minSpareThreads="25" maxSpareThreads="999" enableLookups="false" redirectPort="8443" acceptCount="999" debug="0" connectionTimeout="20000" disableUploadTimeout="true" />
再测试 ,十多分钟后问题依旧 报错如下: 严重:All threads (999) are currently busy, waiting. Increase maxThreads (999) or check the servlet status 这个已经最大了 web server允许的最大连接数还受制于操作系统的内核参数设置,通常Windows是2000个左右,Linux是1000个左右。也就是说maxThreads最大连接数,不能高于一千。
并且我在catalina.sh中配置了JAVA_OPTS='-Xms256m -Xmx512m'最大内存
MYSQL的配置文件 /etc/my.cnf
# The following options will be passed to all MySQL clients [client] #password = your_password port = 3306 socket = /tmp/mysql.sock
# Here follows entries for some specific programs
# The MySQL server [mysqld] port = 3306 socket = /tmp/mysql.sock skip-locking key_buffer = 384M max_allowed_packet = 1M table_cache = 512 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 8M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size = 32M back_log = 500 max_connections = 1024 default-character-set = gb2312 # Try number of CPU's*2 for thread_concurrency thread_concurrency = 8
[mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates
[isamchk] key_buffer = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M
[myisamchk] key_buffer = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M
[mysqlhotcopy] interactive-timeout
问题 :大家看是什么问题,是TOMCAT的配置问题,还是MYSQL的问题 还是程序的问题,我们好象是用的tomcat自己带的数据库连接池,没有用到 MYSQL官方网站上的连接池的jar文件,不知道是不是这个的问题。
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