resin3的优化配置
说明:
本文是在apache2+resin3(开源版)环境下的配置,主要是对resin3配置进行了分析,详细调试请见caucho-doc ,apache2的调优见apache的man文档。实践总结,如转载请注明出处–2hei.net 谢谢.
Using Resin(R) under the GNU Public License (GPL).
See http://www.caucho.com for information on Resin Professional,
including caching, clustering, JNI acceleration, and OpenSSL integration.
resin配置文件: resin.conf
1、dependency-check-interval 参数调整
resin检查系统配置及java、jsp、resin.conf等文件的时间间隔。
默认值为2秒,适合开发及调试环境,如果是正式环境尽量把参数调大或者直接改为-1,不允许检查,也就是禁止了热部署。
<dependency-check-interval>-1s</dependency-check-interval>
2、缓存
改变cache-mapping的值:
<cache-mapping url-pattern=”/” expires=”5s”/>
<cache-mapping url-pattern=”*.gif” expires=”60s”/>
<cache-mapping url-pattern=”*.jpg” expires=”60s”/>
<cache-mapping url-pattern=”*.png” expires=”60s”/>
3、jvm优化
jvm需要根据你的系统配置及应用来调整。
JVM OPTION PASSED TO RESIN MEANING
-Xms initial java heap size
-Xmx maximum java heap size
-Xmn the size of the heap for the young generation
将-Xms和-Xmx设置为一样大小是不错的选择。
如: bin/httpd.sh -Xms500M -Xmx500M -Xmn100M
更多的关于jvm优化参数如:young generation、Eden generation、older generation可见
Sun documentation on garbage collection
jvm的监控,google一下有很多的工具,如:jconsole jstat jstack
jconsole的使用见我的另外一篇文章 《使用Jconsole对java的内存使用情况(JVM)进行监控》
$jps
1229 Jps
1003 Resin
973 resin.jar
$jmap 973
Attaching to process ID 973, please wait…
Debugger attached successfully.
Server compiler detected.
JVM version is 1.5.0_16-b02
0x0000000040000000 64K /home/jdk1.5.0_16/bin/java
0x00000030b2a00000 127K /lib64/ld-2.5.so
0x00000030b2e00000 1647K /lib64/libc-2.5.so
0x00000030b3200000 22K /lib64/libdl-2.5.so
0x00000030b3600000 600K /lib64/libm-2.5.so
0x00000030b3a00000 138K /lib64/libpthread-2.5.so
0x00000030b5a00000 111K /lib64/libnsl-2.5.so
0x00002aaab46ad000 26K /home/jdk1.5.0_16/jre/lib/amd64/libmanagement.so
0x00002aaab49de000 79K /home/jdk1.5.0_16/jre/lib/amd64/libnet.so
0x00002aeeac3c1000 9933K /home/jdk1.5.0_16/jre/lib/amd64/server/libjvm.so
0x00002aeeacd46000 43K /home/jdk1.5.0_16/jre/lib/amd64/native_threads/libhpi.so
0x00002aeeace61000 52K /lib64/libnss_files-2.5.so
0x00002aeead06c000 58K /home/jdk1.5.0_16/jre/lib/amd64/libverify.so
0x00002aeead17b000 171K /home/jdk1.5.0_16/jre/lib/amd64/libjava.so
0x00002aeead2a5000 78K /home/jdk1.5.0_16/jre/lib/amd64/libzip.so
jstat -gc 1489 1000 3
S0C S1C S0U S1U EC EU OC OU PC PU YGC YGCT FGC FGCT GCT
43648.0 43648.0 0.0 0.0 262208.0 101390.5 699072.0 18545.6 28032.0 15756.6 1 0.055 1 0.115 0.170
43648.0 43648.0 0.0 0.0 262208.0 101390.5 699072.0 18545.6 28032.0 15756.6 1 0.055 1 0.115 0.170
43648.0 43648.0 0.0 0.0 262208.0 101390.5 699072.0 18545.6 28032.0 15756.6 1 0.055 1 0.115 0.170
jstack 1489
Thread 1495: (state = BLOCKED)
– java.lang.Object.wait(long) @bci=0 (Interpreted frame)
– java.lang.Object.wait() @bci=2, line=474 (Interpreted frame)
– java.lang.ref.Reference$ReferenceHandler.run() @bci=46, line=116 (Interpreted frame)
Thread 1489: (state = IN_NATIVE)
– java.net.SocketInputStream.socketRead0(java.io.FileDescriptor, byte[], int, int, int) @bci=0 (Interpreted frame)
– java.net.SocketInputStream.read(byte[], int, int) @bci=84, line=129 (Interpreted frame)
– java.net.SocketInputStream.read() @bci=23, line=182 (Interpreted frame)
– com.caucho.server.resin.Resin.waitForExit() @bci=304, line=1265 (Interpreted frame)
– com.caucho.server.resin.Resin.main(java.lang.String[]) @bci=42, line=1367 (Interpreted frame)
4、JNI加速
resin不使用NIO而是使用了JNI的方式使用本地码的方式来提升效率,经验证,resin使用JNI的效率要高于使用NIO,
使用JNI是需要对resin进行编译,在./configure时把jni编译进去,
./configure –enable-jni 美中不足的是Resin Professional版本才提供此项功能。
下面是resin-doc的说明:
Resin does not use NIO – it uses JNI to handle low-level I/O calls with native code. The performance using this method was found to be much better than nio.
5、jsp第一次编译的处理
一般来讲,第一次访问jsp会自动进行编译,如果更新了过多的jsp、且系统访问很大的话,重启resin容易造成负载过高。
下面配置是启动app-server时,对所有的jsp进行编译,编译完毕后启动监听,这样启动时间会长一些,但是可以防止第一次访问编译造成系统负载大。
<listener>
<listener-class>com.caucho.jsp.JspPrecompileListener</listener-class>
<init>
<extension>jsp</extension>
<extension>jspx</extension>
</init>
</listener>
6、resin 与apache 性能的比较
resin3单独使用时性能也是不错,当然也可以跟apache配合使用。下面是resin-doc中的说法:
For JSP and Servlets, Resin standalone is certainly faster than Resin/Apache. Because of the extra overhead of the Resin/Apache connection, the Resin/Apache configuration is necessarily slower than Resin standalone.
可以看出各有优劣,
apache对于静态页面来说比较快。如果使用了SSL,apache+resin要比resin单独使用快一些,更为重要的是resin3的开源版本不支持ssl。
7、resin-server TIME_WAIT 过多的处理
thread-max指定了最大连接数,socket-timeout是socket超时时间
keepalive-max指定了长连接的数量,这是可以重复使用的连接,netstat -an时系统可以看到响应数量的ESTABLISHED状态
设定keepalive-max和把keepalive-timeout调小可以减少TIME_WAIT的数量。
<thread-max>256</thread-max>
<socket-timeout>65s</socket-timeout>
<keepalive-max>128</keepalive-max>
<keepalive-timeout>120s</keepalive-timeout>
一般来讲如果是Resin standalone方式,调整timeout并不是很重要,如果是apache+resin的方式,而且apache压力很大的情况下,需要调小timeout的值。
load-balance-idle-time是用来设置load-balance和分布式session的关闭时间,默认时间为keepalive-timeout – 1s
<load-balance-idle-time>100s</load-balance-idle-time>
8、关于watchdog
resin3启动是多了一个watchdog的进程。可以单独启动也可以跟随resin.jar一起启动,主要是用来监控resin jvm实例,在必要的时候重启。
<watchdog-jvm-arg>-Dcom.sun.management.jmxremote</watchdog-jvm-arg>
<watchdog-port>6600</watchdog-port>
查看 watchdog 状态
java -jar lib/resin.jar status
Resin/3.1.6 status for watchdog at 127.0.0.1:6600
server ” : active
password: missing
user: root
root: /home/resin/
conf: /home/resin/conf/resin.conf
本文固定链接: https://www.2hei.net/2008/11/23/resin3_tuning/ | 2hei.net