|
1
|
// $Id$
|
|
2
|
/**
|
|
3
|
* Copyright (C) 2009 EDIT
|
|
4
|
* European Distributed Institute of Taxonomy
|
|
5
|
* http://www.e-taxonomy.eu
|
|
6
|
*
|
|
7
|
* The contents of this file are subject to the Mozilla Public License Version 1.1
|
|
8
|
* See LICENSE.TXT at the top of this package for the full license terms.
|
|
9
|
*/
|
|
10
|
package eu.etaxonomy.cdm.server;
|
|
11
|
|
|
12
|
import java.lang.management.ManagementFactory;
|
|
13
|
import java.lang.management.MemoryMXBean;
|
|
14
|
import java.lang.management.MemoryPoolMXBean;
|
|
15
|
import java.lang.management.MemoryUsage;
|
|
16
|
import java.util.List;
|
|
17
|
|
|
18
|
import org.apache.log4j.Logger;
|
|
19
|
|
|
20
|
/**
|
|
21
|
* @author a.kohlbecker
|
|
22
|
* @date 30.07.2010
|
|
23
|
*
|
|
24
|
*/
|
|
25
|
public class JvmManager {
|
|
26
|
|
|
27
|
/**
|
|
28
|
*
|
|
29
|
*/
|
|
30
|
private static final String SUFFIX_PERM_GEN = "Perm Gen";
|
|
31
|
|
|
32
|
public static final Logger logger = Logger.getLogger(JvmManager.class);
|
|
33
|
|
|
34
|
public static MemoryUsage getPermGenSpaceUsage(){
|
|
35
|
return getMemoryPoolUsage(SUFFIX_PERM_GEN);
|
|
36
|
}
|
|
37
|
|
|
38
|
protected static MemoryUsage getMemoryPoolUsage(String nameSuffix) {
|
|
39
|
List<MemoryPoolMXBean> memoryPoolMXBeans = ManagementFactory.getMemoryPoolMXBeans();
|
|
40
|
|
|
41
|
for(MemoryPoolMXBean memoryPoolMXBean : memoryPoolMXBeans){
|
|
42
|
if(memoryPoolMXBean.getName().endsWith(nameSuffix)){
|
|
43
|
logger.debug(memoryPoolMXBean.getName()
|
|
44
|
+ ": init= " + memoryPoolMXBean.getUsage().getInit()
|
|
45
|
+ ", used= "+memoryPoolMXBean.getUsage().getUsed()
|
|
46
|
+ ", max= "+memoryPoolMXBean.getUsage().getMax()
|
|
47
|
+ ", committed= "+memoryPoolMXBean.getUsage().getCommitted());
|
|
48
|
return memoryPoolMXBean.getUsage();
|
|
49
|
}
|
|
50
|
}
|
|
51
|
return null;
|
|
52
|
}
|
|
53
|
|
|
54
|
public static MemoryUsage getHeapMemoryUsage(){
|
|
55
|
|
|
56
|
MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
|
|
57
|
if(memoryMXBean != null){
|
|
58
|
logger.debug("NonHeapMemoryUsage: "+memoryMXBean.getHeapMemoryUsage());
|
|
59
|
return memoryMXBean.getHeapMemoryUsage();
|
|
60
|
}
|
|
61
|
return null;
|
|
62
|
}
|
|
63
|
|
|
64
|
/**
|
|
65
|
*
|
|
66
|
* Note, however, that this does not distinguish virtual cores from physical cores. so, for example,
|
|
67
|
* if your machine has hyperthreading enabled you will see double the number of physical cores.
|
|
68
|
*
|
|
69
|
* see https://community.oracle.com/thread/2141632?start=0&tstart=0
|
|
70
|
*
|
|
71
|
* @return
|
|
72
|
*/
|
|
73
|
public static int availableProcessors() {
|
|
74
|
|
|
75
|
return Runtime.getRuntime().availableProcessors();
|
|
76
|
}
|
|
77
|
|
|
78
|
}
|