推荐回答(1个)
(*^__^*) 嘻嘻……
Resin的启动参数详解:
1.命令行参数(Command-line arguments)
-install (Windows) install Resin as a service (but doesn't automatically start.)
-install-as xxx (Windows) install Resin as a named service (but doesn't utomatically start.)
-remove (Windows) install Resin as a service (but doesn't automatically start.)
-remove-as xxx (Windows) remove Resin as a named service (but doesn't automatically start.)
2.JDK参数(JDK arguments:在Httpd.sh参数的配置)
<1>.文件位置:${resin30}/bin/httpd.sh
<2>.args='-J-server -Xms200m -Xmx1024m -Xloggc:./log/gc.log -XX:MaxNewSize=256m -XX:MaxPermSize=256m -Djava.awt.headless=true'
参数说明:
(1)J-server -Xms200m -Xmx1024m 其中,-Xms200m 表示启动时,初时内存大小,-Xmx1024m最大之一内存占用大小。(-Xmn100m可选)
(2)-XX:MaxNewSize=256m -XX:MaxPermSize=256m 表示:内存的永久保存区域(PermGen space)的大小,PermGen space的全称是Permanent Generation space,是指内存的永久保存区域OutOfMemoryError: PermGen space从表面上看就是内存溢出,解决方法也一定是加大内存。说说为什么会内存益出:这一部分用于存放Class和Meta的信息,Class在被 Load的时候被放入PermGen space区域,它和和存放Instance的Heap区域不同,GC(Garbage Collection)不会在主程序运行期对PermGen space进行清理
一般 -XX:PermSize=64M -XX:MaxNewSize=256m -XX:MaxPermSize=128m这些值不需要设置的,除非perm溢出,设置一下MaxPermSize就行,启动脚本加上-server后,也不用在设置MaxNewSize。
(3)-Djava.awt.headless=true 解决在linux/unix验证码图片不能显示的问题。
3.通用 JVM 参数
指定传递到启动应用程序服务器进程的 Java 虚拟机代码的命令行参数。
下面是可以在“通用 JVM 参数”字段中输入的可选命令行参数。如果输入多个自变量,请在每个自变量之间输入空格。
重要: 如果该参数表明它仅适用于 IBM Developer Kit,您就无法为另一个 JVM 使用该参数,例如 Sun JDK 或 HP JDK。
-Xquickstart
可以使用 -Xquickstart 来以低于缺省方式的优化级别进行初始编译。之后,根据采样结果的不同,可以采用缺省方式下初始编译的级别来进行重新编译。适合于早期的平均速度比长期运行吞吐量更为重要的应用程序 -Xquickstart。在某些调试方案、测试装置和短时间运行的工具中,可以将启动时间缩短 15% 到 20%。
-Xverify:none
如果在类装入期间要跳过类验证阶段,可以使用 -Xverify:none。在启用即时(JIT)编译器的情况下使用 -Xverify:none 能够将启动时间缩短 10-15%。
-Xnoclassgc
可以使用 -Xnoclassgc 来禁用类垃圾回收。此操作可以提高类重用程度,并可以略微提高性能。但是,其代价是您无法收集这些类拥有的资源。可以使用 verbose:gc 配置设置(此设置将输出类垃圾回收统计信息)来监控垃圾回收。检查这些统计信息将帮助您理解再生的资源和再生资源必需的垃圾回收量之间的平衡。然而,如果在您的工作负载中反复地垃圾回收同一组类,那么您应该禁用垃圾回收。缺省情况下,启用类垃圾回收。
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