CentOS JSP如何优化内存使用
导读：在 CentOS 系统上优化 JSP 应用程序的内存使用，可以从以下几个方面进行： 调整 Java 虚拟机（JVM）参数： 为 JVM 分配合适的内存大小。可以通过设置 -Xms 和 -Xmx 参数来调整初始堆内存和最大堆内存。例如，...
在 CentOS 系统上优化 JSP 应用程序的内存使用，可以从以下几个方面进行：
-
调整 Java 虚拟机（JVM）参数：
- 为 JVM 分配合适的内存大小。可以通过设置
-Xms和-Xmx参数来调整初始堆内存和最大堆内存。例如，将初始堆内存设置为 256MB，最大堆内存设置为 1024MB：-Xms256m -Xmx1024m - 调整永久代（PermGen）或元空间（Metaspace）的大小。对于 Java 7 及更早版本，请设置
-XX:PermSize和-XX:MaxPermSize参数。对于 Java 8 及更高版本，请设置-XX:MetaspaceSize和-XX:MaxMetaspaceSize参数。例如：-XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m - 启用垃圾回收日志，以便分析垃圾回收行为。可以添加以下参数：
-XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:/path/to/gc.log
- 为 JVM 分配合适的内存大小。可以通过设置
-
优化 JSP 编译选项：
- 减少 JSP 页面的编译频率。可以通过设置
development和production模式来实现。在development模式下，JSP 页面会在每次请求时重新编译；而在production模式下，JSP 页面只会在第一次请求时编译。可以通过在web.xml文件中设置< jsp-config>元素的< jsp-property-group>子元素来实现：< jsp-config> < jsp-property-group> < url-pattern> *.jsp< /url-pattern> < el-ignored> true< /el-ignored> < page-encoding> UTF-8< /page-encoding> < scripting-invalid> false< /scripting-invalid> < include-prelude> /WEB-INF/jsp/common/taglib.jspf< /include-prelude> < include-coda> /WEB-INF/jsp/common/footer.jspf< /include-coda> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < page-encoding> UTF-8< /page-encoding> < scripting-invalid> false< /scripting-invalid> < el-ignored> true< /el-ignored> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces> < default-content-type> text/html< /default-content-type> < buffer> 8kb< /buffer> < auto-flush> true< /auto-flush> < is-xml> false< /is-xml> < deferred-syntax-allowed-as-literal> true< /deferred-syntax-allowed-as-literal> < trim-directive-whitespaces> true< /trim-directive-whitespaces>
- 减少 JSP 页面的编译频率。可以通过设置
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