/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb;
import java.util.ArrayList;
import java.util.Iterator;
import org.voltdb.VoltTable.ColumnInfo;
public class GcStats extends StatsSource {
private int m_lastNewGenGcCount = 0;
private int m_totalNewGenGcCount = 0;
private int m_lastNewGenGcTime = 0;
private int m_totalNewGenGcTime = 0;
private int m_lastOldGenGcCount = 0;
private int m_totalOldGenGcCount = 0;
private int m_lastOldGenGcTime = 0;
private int m_totalOldGenGcTime = 0;
private boolean m_intervalCollection = false;
public GcStats() {
super(false);
}
public synchronized void gcInspectorReport(boolean youngGenGC, int gcCount, long avgGcTime) {
if (youngGenGC) {
m_lastNewGenGcCount += gcCount;
m_lastNewGenGcTime += avgGcTime;
}
else {
m_lastOldGenGcCount += gcCount;
m_lastOldGenGcTime += avgGcTime;
}
}
@Override
protected Iterator<Object> getStatsRowKeyIterator(boolean interval) {
m_intervalCollection = interval;
return new Iterator<Object>() {
boolean returnRow = true;
@Override
public boolean hasNext() {
return returnRow;
}
@Override
public Object next() {
if (returnRow) {
returnRow = false;
return new Object();
} else {
return null;
}
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
@Override
protected void populateColumnSchema(ArrayList<ColumnInfo> columns) {
super.populateColumnSchema(columns);
columns.add(new VoltTable.ColumnInfo("NEWGEN_GC_COUNT", VoltType.INTEGER));
columns.add(new VoltTable.ColumnInfo("NEWGEN_AVG_GC_TIME", VoltType.BIGINT));
columns.add(new VoltTable.ColumnInfo("OLDGEN_GC_COUNT", VoltType.INTEGER));
columns.add(new VoltTable.ColumnInfo("OLDGEN_AVG_GC_TIME", VoltType.BIGINT));
}
@Override
protected synchronized void updateStatsRow(Object rowKey, Object[] rowValues) {
if (m_intervalCollection) {
rowValues[columnNameToIndex.get("NEWGEN_GC_COUNT")] = m_lastNewGenGcCount;
rowValues[columnNameToIndex.get("NEWGEN_AVG_GC_TIME")] = m_lastNewGenGcCount > 0 ? m_lastNewGenGcTime / m_lastNewGenGcCount : 0;
rowValues[columnNameToIndex.get("OLDGEN_GC_COUNT")] = m_lastOldGenGcCount;
rowValues[columnNameToIndex.get("OLDGEN_AVG_GC_TIME")] = m_lastOldGenGcCount > 0 ? m_lastOldGenGcTime / m_lastOldGenGcCount : 0;
m_totalNewGenGcCount += m_lastNewGenGcCount;
m_lastNewGenGcCount = 0;
m_totalOldGenGcCount += m_lastOldGenGcCount;
m_lastOldGenGcCount = 0;
m_totalNewGenGcTime += m_lastNewGenGcTime;
m_lastNewGenGcTime = 0;
m_totalOldGenGcTime += m_lastOldGenGcCount;
m_lastOldGenGcCount = 0;
}
else {
int totalNewGcCount = m_totalNewGenGcCount + m_lastNewGenGcCount;
int totalOldGcCount = m_totalOldGenGcCount + m_lastOldGenGcCount;
rowValues[columnNameToIndex.get("NEWGEN_GC_COUNT")] = totalNewGcCount;
rowValues[columnNameToIndex.get("NEWGEN_AVG_GC_TIME")] = totalNewGcCount > 0 ? (m_totalNewGenGcTime + m_lastNewGenGcTime) / totalNewGcCount : 0;
rowValues[columnNameToIndex.get("OLDGEN_GC_COUNT")] = totalOldGcCount;
rowValues[columnNameToIndex.get("OLDGEN_AVG_GC_TIME")] = totalOldGcCount > 0 ? (m_totalOldGenGcTime + m_lastOldGenGcTime) / totalOldGcCount : 0;
}
super.updateStatsRow(rowKey, rowValues);
}
}