问题：并发一直上不去。求大神指点。

测试机环境：Red hat6.3 IBM 8G 内存 4核处理器

主要配置清单：

httpd-mpm.conf

<IfModule mpm_prefork_module>
    ServerLimit      4000
    StartServers      128
    MinSpareServers   128
    MaxSpareServers   256
    MaxClients       4000
    MaxRequestsPerChild   0
</IfModule>

<IfModule mpm_worker_module>
    StartServers          5
    ServerLimit          20
    ThreadLimit         200
    MaxClients         4000
    MinSpareThreads      25
    MaxSpareThreads     250
    ThreadsPerChild     200
    MaxRequestsPerChild   0
</IfModule>

<IfModule mpm_beos_module>
    StartThreads            10
    MaxClients              50
    MaxRequestsPerThread 10000
</IfModule>

<IfModule mpm_netware_module>
    ThreadStackSize      65536
    StartThreads           250
    MinSpareThreads         25
    MaxSpareThreads        250
    MaxThreads            1000
    MaxRequestsPerChild      0
    MaxMemFree             100
</IfModule>

<IfModule mpm_mpmt_os2_module>
    StartServers           2
    MinSpareThreads        5
    MaxSpareThreads       10
    MaxRequestsPerChild    0
</IfModule>

<IfModule mpm_winnt_module>
    ThreadsPerChild     2000
    MaxRequestsPerChild    0
</IfModule>

workers.properties

worker.list = controller,tomcat1,tomcat2,tomcat3  
   
#========tomcat1========  
worker.tomcat1.port=7009       #ajp13 端口号，在tomcat下server.xml配置,默认8009  
worker.tomcat1.host=192.168.45.33  #tomcat的主机地址，如不为本机，请填写ip地址  
worker.tomcat1.type=ajp13  
worker.tomcat1.lbfactor = 1    #server的加权比重，值越高，分得的请求越多  
#========tomcat2========  
worker.tomcat2.port=6009       #ajp13 端口号，在tomcat下server.xml配置,默认8009  
worker.tomcat2.host=192.168.45.33  #tomcat的主机地址，如不为本机，请填写ip地址  
worker.tomcat2.type=ajp13  
worker.tomcat2.lbfactor = 1    #server的加权比重，值越高，分得的请求越多  

#========tomcat3========  
worker.tomcat3.port=5009       #ajp13 端口号，在tomcat下server.xml配置,默认8009  
worker.tomcat3.host=192.168.45.33  #tomcat的主机地址，如不为本机，请填写ip地址  
worker.tomcat3.type=ajp13  
worker.tomcat3.lbfactor = 1    #server的加权比重，值越高，分得的请求越多  
 
#========controller,负载均衡控制器========  
worker.controller.type=lb  
worker.controller.balance_workers=tomcat1,tomcat2,tomcat3   #指定分担请求的tomcat，旧版本中的balanced_workers,已不再推荐使用！  
worker.controller.sticky_session=1 #sticky_session为1表示， 

httpd.conf

LoadModule jk_module modules/mod_jk.so
JkLogFile /var/log/mod_jk.log
JkShmFile logs/mod_jk.shm
JkLogLevel info
JkWorkersFile conf/workers.properties
JkMount /* controller


server.xml

<Executor name="tomcatThreadPools" namePrefix="catalina-exec-"  
                  maxThreads="1000" minSpareThreads="20" maxIdleTime="15000" />
        <Connector executor="tomcatThreadPools"  
               port="6080" protocol="org.apache.coyote.http11.Http11NioProtocol"  
               connectionTimeout="60000"  
               keepAliveTimeout="15000"  
               minProcessors="100"
               maxProcessors="1000"
               maxThreads="1000"
               minSpareThreads="100"
               maxSpareThreads="500"
               maxKeepAliveRequests="1"  
               redirectPort="6443"  
               maxHttpHeaderSize="8192" URIEncoding="UTF-8" enableLookups="false" acceptCount="1000" disableUploadTimeout="true"/>
<Connector executor="tomcatThreadPools"  
               keepAliveTimeout="15000"  
               maxThreads="1000"
               minSpareThreads="100"
               maxSpareThreads="500"
               acceptCount="1000"
               connectionTimeout="20000"
               maxKeepAliveRequests="1"  port="6009" protocol="AJP/1.3" redirectPort="6443" />


tomcat启动内存

JAVA_OPTS="-XX:PermSize=64M -XX:MaxPermSize=128m -Xms1024m -Xmx1024m -Duser.timezone=Asia/Shanghai"


测试结果：

Apache+单个tomcat 静态页面 ： 并发 1500  请求转发：1500

apache+两个tomcat 静态页面： 并发2300  请求转发： 1800

apache+三个tomcat静态页面： 并发2300   请求转发：1900