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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-5523) [classlib][lang-management][geronimo] MemoryUsage returns incorrect values
Date Mon, 18 Feb 2008 01:38:35 GMT
[classlib][lang-management][geronimo] MemoryUsage returns incorrect values

                 Key: HARMONY-5523
                 URL: https://issues.apache.org/jira/browse/HARMONY-5523
             Project: Harmony
          Issue Type: Bug
          Components: App-Oriented Bug Reports, Classlib
    Affects Versions: 5.0M4, 5.0M5
            Reporter: Vasily Zakharov

The following test demonstrates the problem:

public class Test {
    public static void main(String[] args) throws Exception {

Output on RI:

$ java Test
init = 0(0K) used = 162416(158K) committed = 2031616(1984K) max = 66650112(65088K)

$ java -Xms128M -Xmx256M Test
init = 134217728(131072K) used = 166480(162K) committed = 133234688(130112K) max = 266403840(260160K)

Output on Harmony:

$ java Test
MemoryUsage: init=16777216used=16777216committed=16777216max=16777216

$ java -Xms128M -Xmx256M Test
MemoryUsage: init=134217728used=134217728committed=134217728max=134217728

Clearly enough, the following problems do exist:

1. getUsed() method always returns the -Xms value instead of actual used memory amount.
2. getMax() method returns the -Xms value instead of -Xmx value.
3. toString() method works incorrectly (output is badly readable).

This issues causes the Geronimo console to display the used memory information incorrectly.

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