关于jetty与tomcat一些性能的研究
现在我有一个servlet的url为/servlet/TestRuning其中关键代码是
PrintWriter out = response.getWriter();
String aStr = request.getParameter("a");
String bStr = request.getParameter("b");
int a = 100;
int b = 100;
try{
a = Integer.parseInt(aStr);
b = Integer.parseInt(bStr);
}catch(Exception excep){
System.err.println("err:" + excep.getMessage());
}
int sum = 0;
long s = System.currentTimeMillis();
for(int i = 0; i < a; ++i){
for(int ii = 0; ii < b; ++ii){
sum = a / b;
}
}
long e = System.currentTimeMillis();
long d = e - s;
out.println( d );
out.flush();
out.close();
这个代码只是两个循环，其中只是作一些除法运算操作。
然后计算时间，并输出给客户端。
此时我将这个应用布署在jetty与tomcat两个服务器中
这两个服务程序都是使用了默认的配置。
在启动程序时，我先使用两个相同的jre。
wapproxy@ubuntu:~$ ps -ef | grep java
wapproxy2076 11 11:28 ? 00:00:03 /usr/lib/jvm/java-6-openjdk/jre/bin/java -Djetty.home=/home/wapproxy/jetty -Djava.io.tmpdir=/tmp -jar /home/wapproxy/jetty/start.jar /home/wapproxy/jetty/etc/jetty-logging.xml /home/wapproxy/jetty/etc/jetty.xml
wapproxy218513988 11:30 pts/0 00:00:02 /usr/lib/jvm/java-6-openjdk/jre/bin/java -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=/home/wapproxy/Tomcat/conf/logging.properties -Djava.endorsed.dirs=/home/wapproxy/Tomcat/endorsed -classpath :/home/wapproxy/Tomcat/bin/bootstrap.jar -Dcatalina.base=/home/wapproxy/Tomcat -Dcatalina.home=/home/wapproxy/Tomcat -Djava.io.tmpdir=/home/wapproxy/Tomcat/temp org.apache.catalina.startup.Bootstrap start
wapproxy232923090 11:31 pts/1 00:00:00 grep --color=auto java
确认一次，在这两个应用中我是布署了相同的应用程序,应用名为jt_jt。
其中tomcat的端口为8888
jetty的端口为8080
我使用ab进行压力测试
Server Software: Jetty(6.1.22)
Server Hostname: 172.31.36.158
Server Port: 8080
Document Path: /jt_jt/servlet/TestRuning?a=100000&b=100000
Document Length: 2 bytes
Concurrency Level: 1
Time taken for tests: 8.715 seconds
Complete requests: 5000
Failed requests: 0
Write errors: 0
Total transferred: 445000 bytes
HTML transferred: 10000 bytes
Requests per second: 573.72 [#/sec] (mean)
Time per request: 1.743 (mean)
Time per request: 1.743 (mean, across all concurrent requests)
Transfer rate: 49.86 received
Connection Times (ms)
minmean[+/-sd] median max
Connect: 0 0 1.1 0 5
Processing: 0 1 7.1 0 50
Waiting: 0 1 7.1 0 50
Total: 0 2 7.2 0 50
Percentage of the requests served within a certain time (ms)
50% 0
66% 0
75% 0
80% 0
90% 5
95% 5
98% 45
99% 50
100% 50 (longest request)
以上是jetty的，下边是tomcat的
Server Software: Apache-Coyote/1.1
Server Hostname: 172.31.36.158
Server Port: 8888
Document Path: /jt_jt/servlet/TestRuning?a=100000&b=100000
Document Length: 3 bytes
Concurrency Level: 1
Time taken for tests: 4.070 seconds
Complete requests: 5000
Failed requests: 0
Write errors: 0
Total transferred: 650000 bytes
HTML transferred: 15000 bytes
Requests per second: 1228.50 [#/sec] (mean)
Time per request: 0.814 (mean)
Time per request: 0.814 (mean, across all concurrent requests)
Transfer rate: 155.96 received
Connection Times (ms)
minmean[+/-sd] median max
Connect: 0 0 1.2 0 5
Processing: 0 0 1.7 0 45
Waiting: 0 0 1.7 0 45
Total: 0 1 2.1 0 45
Percentage of the requests served within a certain time (ms)
50% 0
66% 0
75% 0
80% 0
90% 5
95% 5
98% 5
99% 5
100% 45 (longest request)
两次测试的并发量我设成了1,也就是线程池的模式对测试结果影响不大。
关键数据如下
jetty 8080 Requests per second: 573.72 [#/sec] (mean)
tomcat 8888Requests per second: 1228.50 [#/sec] (mean)
基本相差一倍之多。
为什么会有这个问题呢？
也许你想看看输入内容是多少
用浏览器输入单次请求http://172.31.36.158:8888/jt_jt/servlet/TestRuning?a=10000000&b=100000000
返回结果为零。
这样是不是可以证明jetty比tomcat是慢一倍呢？
如果可以证明，为什么jetty是慢过tomcat那么多呢?
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