Tomcat配置优化
1. 设置Java启动参数:编辑bin/catalina.sh加上如下脚本:
JAVA_OPTS='-Xms512m -Xmx1024m'
JAVA_OPTS="$JAVA_OPTS -server -XX:PermSize=64M -XX:MaxPermSize=256m"
其中 JAVA_OPTS='-Xms512m -Xmx1024m' 是设置Tomcat使用的内存的大小.
-XX:PermSize=64M -XX:MaxPermSize=256m 指定类空间(用于加载类)的内存大小
详细说明参看Java的Heap空间设置.
2.给特定MIME类型文件设置Gzip压缩:
conf/server.xml增加如下配置：<Connector port="8080" protocol="HTTP/1.1"maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="4" maxSpareThreads="50"
enableLookups="false" redirectPort="8443" acceptCount="100"
connectionTimeout="30000" disableUploadTimeout="true" URIEncoding="utf-8"
compression="on"
compressionMinSize="2048"
noCompressionUserAgents="gozilla, traviata"
compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain"/>
<!-- Note : To use gzip compression you could set the following properties :
compression="on"
compressionMinSize="2048"
noCompressionUserAgents="gozilla, traviata"
compressableMimeType="text/html,text/xml"
--> 具体参数说明如下：
1) compression="on" 打开压缩功能
2) compressionMinSize="2048" 启用压缩的输出内容大小，这里面默认为2KB
3) noCompressionUserAgents="gozilla, traviata" 对于以下的浏览器，不启用压缩
4) compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain" 压缩文件MIME类型
3.设置cache-control的Filter:
Java Filter代码:public class ResponseHeaderFilter implements Filter {
FilterConfig fc;
public void doFilter(ServletRequest req, ServletResponse res,
FilterChain chain) throws IOException, ServletException {
HttpServletResponse response = (HttpServletResponse) res;
// set the provided HTTP response parameters
for (Enumeration e = fc.getInitParameterNames(); e.hasMoreElements();) {
String headerName = (String) e.nextElement();
response.addHeader(headerName, fc.getInitParameter(headerName));
}
// pass the request/response on
chain.doFilter(req, response);
}
public void init(FilterConfig filterConfig) {
this.fc = filterConfig;
}
public void destroy() {
this.fc = null;
}
}web.xml配置:<filter>
<filter-name>NoCache</filter-name>
<filter-class>apis.server.common.util.ResponseHeaderFilter</filter-class>
<init-param>
<param-name>Cache-Control</param-name>
<param-value>no-cache, must-revalidate</param-value>
</init-param>
</filter>
<filter>
<filter-name>CacheForWeek</filter-name>
<filter-class>apis.server.common.util.ResponseHeaderFilter</filter-class>
<init-param>
<param-name>Cache-Control</param-name>
<param-value>max-age=604800, public</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>NoCache</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CacheForWeek</filter-name>
<url-pattern>/images/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CacheForWeek</filter-name>
<url-pattern>/img/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CacheForWeek</filter-name>
<url-pattern>/icons/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CacheForWeek</filter-name>
<url-pattern>/ext/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CacheForWeek</filter-name>
<url-pattern>*.js</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>CacheForWeek</filter-name>
<url-pattern>*.css</url-pattern>
</filter-mapping>
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