大家好。我遇到了下一个问题：处理需要使用 WAS 和 tomcat 在不同环境中部署的项目。使用的 WAS docer img：common/base-ibm-websphere:8.0.0.10 - 8.0 架构：x86_64
Name IBM WebSphere Application Server
Version 8.0.0.10
ID BASE
Build Level cf101502.03
Build Date 1/16/15
Package com.ibm.websphere.DEVELOPERSILAN.v80_8.0.10.20150116_1534
Architecture x86-64 (64 bit)
Installed Features IBM 64-bit SDK for Java, Version 6
EJBDeploy tool for pre-EJB 3.0 modules
Embeddable EJB container
Stand-alone thin clients and resource adapters
使用的Tomcat docker img：common/base-tomcat:7
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) Server VM (build 24.80-b11, mixed mode)
从一开始就假设 WAS 出了点问题，因为最简单的请求会慢得多（x8 慢）：
long startMethodTime = System.nanoTime();
long endMethodTime;
long operationStartTime;
long operationEndTime;
Long result = 0L;
Long resultSet = 0L;
operationStartTime = System.nanoTime();
List<ResultDTO> testDAOList = new ArrayList<ResultDTO>();
for (int i = 0; i < 200000; i++) {
ResultDTO testClass = new ResultDTO();
testClass.setBody(String.valueOf(new Random().nextDouble()));
testClass.setResult(String.valueOf(new Random().nextInt()));
testClass.setSubject(String.valueOf(new Date()));
testDAOList.add(testClass);
}
operationEndTime = System.nanoTime();
String operationTime = String.valueOf(((operationEndTime - operationStartTime) / 1000000));
LOGGER.error("Creation object in cycle=" + operationTime);
operationStartTime = System.nanoTime();
for (ResultDTO testDAO : testDAOList) {
result += testDAO.getResult().length();
}
operationEndTime = System.nanoTime();
operationTime = String.valueOf((operationEndTime - operationStartTime)/ 1000000);
LOGGER.error("Incrementation in the loop of objects=" + operationTime);
operationStartTime = System.nanoTime();
Set<ResultDTO> sortedResults = new TreeSet<ResultDTO>(
new Comparator<ResultDTO>() {
public int compare(ResultDTO r1, ResultDTO r2) {
int firstCompValue = (r1.getResult().length() + r1.getSubject().length()) % 2;
int secondCompValue = (r2.getResult().length() + r2.getSubject().length()) % 2;
return firstCompValue - secondCompValue;
}
}
);
sortedResults.addAll(testDAOList);
operationEndTime = System.nanoTime();
operationTime = String.valueOf((operationEndTime - operationStartTime) / 1000000);
LOGGER.error("Sort the Set of Objects=" + operationTime);
for (ResultDTO testDAO : sortedResults) {
resultSet += testDAO.getBody().length();
}
//Creation of 100 default objects
long hundredObjectsCreationTime = 0;
for (int i = 0; i < 100; i++) {
operationStartTime = System.nanoTime();
ResultDTO testClass = new ResultDTO();
testClass.setBody(String.valueOf(new Random().nextDouble()));
testClass.setResult(String.valueOf(new Random().nextInt()));
testClass.setSubject(String.valueOf(new Date()));
operationEndTime = System.nanoTime();
hundredObjectsCreationTime += (operationEndTime - operationStartTime);
}
LOGGER.error("100 objects creation time = " + hundredObjectsCreationTime);
endMethodTime = System.nanoTime();
operationTime = String.valueOf((endMethodTime - startMethodTime) / 1000000);
LOGGER.error("Test method duration = " + operationTime);
它在 x8 中的 WAS 上执行比在 Tomcat 上慢。组合测试结果：
Tomcat:
2018-03-26 21:39:44,347 ERROR [c.v.e.r.r.AboutResource] Creation object in cycle=1006
2018-03-26 21:39:44,381 ERROR [c.v.e.r.r.AboutResource] Incrementation in the loop of objects=33
2018-03-26 21:39:44,411 ERROR [c.v.e.r.r.AboutResource] Sort the Set of Objects=29
2018-03-26 21:39:44,411 ERROR [c.v.e.r.r.AboutResource] 100 objects creation time = 405100 - microsec
2018-03-26 21:39:44,411 ERROR [c.v.e.r.r.AboutResource] Test method duration = 1070
WAS:
[26/03/18 22:26:39:944 UTC] 00000018 SystemOut O ERROR [c.v.e.r.r.AboutResource] Creation object in cycle=8408
[26/03/18 22:26:40:069 UTC] 00000018 SystemOut O ERROR [c.v.e.r.r.AboutResource] Incrementation in the loop of objects=124
[26/03/18 22:26:40:373 UTC] 00000018 SystemOut O ERROR [c.v.e.r.r.AboutResource] Sort the Set of Objects=303
[26/03/18 22:26:40:377 UTC] 00000018 SystemOut O ERROR [c.v.e.r.r.AboutResource] 100 objects creation time = 3384400
[26/03/18 22:26:40:377 UTC] 00000018 SystemOut O ERROR [c.v.e.r.r.AboutResource] Test method duration = 8841
在 WAS 端只配置了堆大小（超过 enoph）和数据库连接（与这个问题无关）。
在调整 IBM jVM / WAS 配置时，首先我应该注意什么？（现在我已经在研究 IBM 手册了，你可能会节省我的时间来避免冒烟测试不同的无效 JVM 属性）。