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memcached演练(4) 使用apache+memcached-session-manager+tomcat集群，存在一些问题。问题列表问题1：2个tomc...
c:\Apache24\bin>ab -n 10000 -c 4 http://192.168.163.146/examples/testSession.jsp
This is ApacheBench, Version 2.3 <$Revision: 1604373 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 192.168.163.146 (be patient)
Completed 1000 requests
...
Completed 10000 requests
Finished 10000 requests
Server Software: Apache/2.2.15
Server Hostname: 192.168.163.146
Server Port: 80
Document Path: /examples/testSession.jsp
Document Length: 331 bytes
Concurrency Level: 4
Time taken for tests: 10.322 seconds
Complete requests: 10000
Failed requests: 0
Total transferred: 5930000 bytes
HTML transferred: 3310000 bytes
Requests per second: 968.84 [#/sec] (mean)
Time per request: 4.129 [ms] (mean)
Time per request: 1.032 [ms] (mean, across all concurrent requests)
Transfer rate: 561.06 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.4 1 5
Processing: 0 4 11.7 3 585
Waiting: 0 4 11.7 3 585
Total: 0 4 11.7 3 585
ERROR: The median and mean for the initial connection time are more than twice the standard
deviation apart. These results are NOT reliable.
吞吐量：968.84。比上节中的测试结果“727.55”超出不少。
经过多次测试，差别有点大。
Requests per second: 1281.74 [#/sec] (mean)
Requests per second: 1451.22 [#/sec] (mean)
模拟一台节点宕机情况，测试吞吐量
c:\Apache24\bin>ab -n 10000 -c 4 http://192.168.163.146/examples/testSession.jsp
This is ApacheBench, Version 2.3 <$Revision: 1604373 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 192.168.163.146 (be patient)
Completed 1000 requests
...
Finished 10000 requests
Server Software: Apache/2.2.15
Server Hostname: 192.168.163.146
Server Port: 80
Document Path: /examples/testSession.jsp
Document Length: 331 bytes
Concurrency Level: 4
Time taken for tests: 7.994 seconds
Complete requests: 10000
Failed requests: 0
Total transferred: 5930000 bytes
HTML transferred: 3310000 bytes
Requests per second: 1250.92 [#/sec] (mean)
Time per request: 3.198 [ms] (mean)
Time per request: 0.799 [ms] (mean, across all concurrent requests)
Transfer rate: 724.41 [Kbytes/sec] received
吞吐量：1250.92。FUCK出乎意料啊。竟然比2个节点的情况下还高。
多次测试，发现均在1700左右。
Requests per second: 1729.64 [#/sec] (mean)
Requests per second: 1779.67 [#/sec] (mean)。
结果出乎我的意料。 记住这个结果，以后做个监控分析下。
以上就介绍了 memcached演练4 使用apache+memcached-session-manager+tomcat集群（续），包括了方面的内容，希望对Javajrs看球网直播吧_低调看直播体育app软件下载_低调看体育直播有兴趣的朋友有所帮助。
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