/*
* Created on Sep 9, 2010
* Created by Paul Gardner
*
* Copyright 2010 Vuze, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License only.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
package org.gudy.azureus2.core3.util.jman;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.MemoryType;
import java.util.List;
import javax.management.Notification;
import javax.management.NotificationEmitter;
import javax.management.NotificationListener;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.logging.LogAlert;
import org.gudy.azureus2.core3.logging.Logger;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.DisplayFormatters;
import org.gudy.azureus2.platform.PlatformManager;
import org.gudy.azureus2.platform.PlatformManagerCapabilities;
import org.gudy.azureus2.platform.PlatformManagerFactory;
import org.gudy.azureus2.core3.util.*;
public class
AEMemoryMonitor
implements AEJavaManagement.MemoryStuff
{
private static AEMemoryMonitor singleton = new AEMemoryMonitor();
private static final long MB = 1024*1024;
private static long max_heap_mb;
public
AEMemoryMonitor()
{
try{
List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
MemoryPoolMXBean pool_to_monitor = null;
long ptm_size = 0;
long overall_max = 0;
for ( MemoryPoolMXBean pool: pools ){
long pool_max = pool.getUsage().getMax();
if ( pool_max > 0 ){
if ( pool.getType() == MemoryType.HEAP ){
overall_max += pool_max;
}
}
if ( pool.getType() == MemoryType.HEAP && pool.isCollectionUsageThresholdSupported()){
long max = pool.getUsage().getMax();
if ( max > ptm_size ){
pool_to_monitor = pool;
ptm_size = max;
}
}
}
max_heap_mb = (overall_max+MB-1)/MB;
if ( pool_to_monitor != null ){
long max = pool_to_monitor.getUsage().getMax();
long threshold = max*3/4;
threshold = Math.min( threshold, 5*1024*1024 );
MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
NotificationEmitter emitter = (NotificationEmitter) mbean;
emitter.addNotificationListener(
new NotificationListener()
{
private long last_mb_log = Long.MAX_VALUE;
private boolean increase_tried;
public void
handleNotification(
Notification notification,
Object handback )
{
MemoryPoolMXBean pool = (MemoryPoolMXBean)handback;
long used = pool.getCollectionUsage().getUsed();
long max = pool.getUsage().getMax();
long avail = max-used;
if ( avail < 0 ){
avail = 0;
}
long mb = (avail+MB-1)/(MB);
if ( mb <= 4 ){
synchronized( this ){
if ( mb >= last_mb_log ){
return;
}
last_mb_log = mb;
}
Runtime runtime = Runtime.getRuntime();
Debug.out( "MemMon: notify triggered: pool=" + pool.getName() +
", used=" + used +
", max=" + max +
": runtime free=" + runtime.freeMemory() + ", tot=" + runtime.totalMemory() + ", max=" + runtime.maxMemory());
Logger.logTextResource(
new LogAlert(
LogAlert.REPEATABLE,
LogAlert.AT_WARNING,
"memmon.low.warning"),
new String[] {
(mb==0?"< ":"") + DisplayFormatters.formatByteCountToKiBEtc( Math.max(1,mb)*MB, true ),
DisplayFormatters.formatByteCountToKiBEtc( max_heap_mb*MB, true )});
if ( mb == 1 && !increase_tried ){
increase_tried = true;
if ( COConfigurationManager.getBooleanParameter( "jvm.heap.auto.increase.enable", true )){
PlatformManager platform = PlatformManagerFactory.getPlatformManager();
if ( platform.hasCapability( PlatformManagerCapabilities.AccessExplicitVMOptions )){
try{
String[] options = platform.getExplicitVMOptions();
long max_mem = AEJavaManagement.getJVMLongOption( options, "-Xmx" );
if ( max_mem <= 0 ){
max_mem = getMaxHeapMB()*MB;
}
final long HEAP_AUTO_INCREASE_MAX = 256*MB;
final long HEAP_AUTO_INCREASE_BY = 16*MB;
if ( max_mem > 0 && max_mem < HEAP_AUTO_INCREASE_MAX ){
max_mem += HEAP_AUTO_INCREASE_BY;
if ( max_mem > HEAP_AUTO_INCREASE_MAX ){
max_mem = HEAP_AUTO_INCREASE_MAX;
}
long last_increase = COConfigurationManager.getLongParameter( "jvm.heap.auto.increase.last", 0 );
if ( max_mem > last_increase ){
COConfigurationManager.setParameter( "jvm.heap.auto.increase.last", max_mem );
options = AEJavaManagement.setJVMLongOption( options, "-Xmx", max_mem );
platform.setExplicitVMOptions( options );
Logger.logTextResource(
new LogAlert(
LogAlert.REPEATABLE,
LogAlert.AT_WARNING,
"memmon.heap.auto.increase.warning"),
new String[] {
DisplayFormatters.formatByteCountToKiBEtc( max_mem, true )});
}
}
}catch( Throwable e ){
Debug.out( e );
}
}
}
}
}
}
},
null, pool_to_monitor );
pool_to_monitor.setCollectionUsageThreshold( threshold );
}
}catch( Throwable e ){
Debug.out( e );
}
if ( max_heap_mb == 0 ){
max_heap_mb = ( Runtime.getRuntime().maxMemory()+MB-1)/MB;
}
}
public long
getMaxHeapMB()
{
return( max_heap_mb );
}
}