| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.jackrabbit.oak.query.stats; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.concurrent.ConcurrentSkipListMap; |
| |
| import javax.management.openmbean.CompositeDataSupport; |
| import javax.management.openmbean.CompositeType; |
| import javax.management.openmbean.OpenDataException; |
| import javax.management.openmbean.OpenType; |
| import javax.management.openmbean.SimpleType; |
| import javax.management.openmbean.TabularData; |
| import javax.management.openmbean.TabularDataSupport; |
| import javax.management.openmbean.TabularType; |
| |
| import org.apache.jackrabbit.oak.commons.jmx.AnnotatedStandardMBean; |
| import org.apache.jackrabbit.oak.query.QueryEngineSettings; |
| import org.apache.jackrabbit.oak.query.stats.QueryStatsData.QueryExecutionStats; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class QueryStatsMBeanImpl extends AnnotatedStandardMBean |
| implements QueryStatsMBean, QueryStatsReporter { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| private final int SLOW_QUERY_LIMIT_SCANNED = |
| Integer.getInteger("oak.query.slowScanLimit", 100000); |
| private final int MAX_STATS_DATA = |
| Integer.getInteger("oak.query.stats", 5000); |
| private final int MAX_POPULAR_QUERIES = |
| Integer.getInteger("oak.query.slowLimit", 100); |
| private final int MAX_QUERY_SIZE = |
| Integer.getInteger("oak.query.maxQuerySize", 2048); |
| private final ConcurrentSkipListMap<String, QueryStatsData> statistics = |
| new ConcurrentSkipListMap<String, QueryStatsData>(); |
| private final QueryEngineSettings settings; |
| private boolean captureStackTraces; |
| private int evictionCount; |
| |
| public QueryStatsMBeanImpl(QueryEngineSettings settings) { |
| super(QueryStatsMBean.class); |
| this.settings = settings; |
| } |
| |
| @Override |
| public TabularData getSlowQueries() { |
| ArrayList<QueryStatsData> list = new ArrayList<QueryStatsData>(); |
| long maxScanned = Math.min(SLOW_QUERY_LIMIT_SCANNED, settings.getLimitReads()); |
| for(QueryStatsData s : statistics.values()) { |
| if(s.getMaxRowsScanned() > maxScanned) { |
| list.add(s); |
| } |
| } |
| Collections.sort(list, new Comparator<QueryStatsData>() { |
| @Override |
| public int compare(QueryStatsData o1, QueryStatsData o2) { |
| return -Long.compare(o1.getMaxRowsScanned(), o2.getMaxRowsScanned()); |
| } |
| }); |
| return asTabularData(list); |
| } |
| |
| @Override |
| public TabularData getPopularQueries() { |
| ArrayList<QueryStatsData> list = new ArrayList<QueryStatsData>(statistics.values()); |
| Collections.sort(list, new Comparator<QueryStatsData>() { |
| @Override |
| public int compare(QueryStatsData o1, QueryStatsData o2) { |
| return -Long.compare(o1.getTotalTimeNanos(), o2.getTotalTimeNanos()); |
| } |
| }); |
| while (list.size() > MAX_POPULAR_QUERIES) { |
| list.remove(list.size() - 1); |
| } |
| return asTabularData(list); |
| } |
| |
| @Override |
| public void resetStats() { |
| statistics.clear(); |
| } |
| |
| @Override |
| public void setCaptureStackTraces(boolean captureStackTraces) { |
| this.captureStackTraces = captureStackTraces; |
| } |
| |
| @Override |
| public boolean getCaptureStackTraces() { |
| return captureStackTraces; |
| } |
| |
| @Override |
| public String asJson() { |
| ArrayList<QueryStatsData> list = new ArrayList<QueryStatsData>(statistics.values()); |
| Collections.sort(list, new Comparator<QueryStatsData>() { |
| @Override |
| public int compare(QueryStatsData o1, QueryStatsData o2) { |
| return -Long.compare(o1.getTotalTimeNanos(), o2.getTotalTimeNanos()); |
| } |
| }); |
| StringBuilder buff = new StringBuilder(); |
| buff.append("[\n"); |
| int i = 0; |
| for(QueryStatsData s : list) { |
| if (i++ > 0) { |
| buff.append(",\n"); |
| } |
| buff.append(s.toString()); |
| } |
| return buff.append("\n]\n").toString(); |
| } |
| |
| @Override |
| public QueryExecutionStats getQueryExecution(String statement, String language) { |
| if (log.isTraceEnabled()) { |
| log.trace("Execute " + language + " / " + statement); |
| } |
| if (statistics.size() > 2 * MAX_STATS_DATA) { |
| evict(); |
| } |
| if (statement.length() > MAX_QUERY_SIZE) { |
| statement = new StringBuilder().append("Truncated query: ") |
| .append(statement.substring(0, MAX_QUERY_SIZE >> 1)) |
| .append(" ...... ") |
| .append(statement.substring(statement.length() - (MAX_QUERY_SIZE >> 1))) |
| .toString(); |
| } |
| QueryStatsData stats = new QueryStatsData(statement, language); |
| QueryStatsData s2 = statistics.putIfAbsent(stats.getKey(), stats); |
| if (s2 != null) { |
| stats = s2; |
| } |
| stats.setCaptureStackTraces(captureStackTraces); |
| return stats.new QueryExecutionStats(); |
| } |
| |
| private void evict() { |
| evictionCount++; |
| // retain 50% of the slowest entries |
| // of the rest, retain the newest entries |
| ArrayList<QueryStatsData> list = new ArrayList<QueryStatsData>(statistics.values()); |
| Collections.sort(list, new Comparator<QueryStatsData>() { |
| @Override |
| public int compare(QueryStatsData o1, QueryStatsData o2) { |
| int comp = -Long.compare(o1.getTotalTimeNanos(), o2.getTotalTimeNanos()); |
| if (comp == 0) { |
| comp = -Long.compare(o1.getCreatedMillis(), o2.getCreatedMillis()); |
| } |
| return comp; |
| } |
| }); |
| Collections.sort(list.subList(MAX_STATS_DATA / 2, MAX_STATS_DATA), new Comparator<QueryStatsData>() { |
| @Override |
| public int compare(QueryStatsData o1, QueryStatsData o2) { |
| return -Long.compare(o1.getCreatedMillis(), o2.getCreatedMillis()); |
| } |
| }); |
| for (int i = MAX_STATS_DATA; i < list.size(); i++) { |
| statistics.remove(list.get(i).getKey()); |
| } |
| } |
| |
| public int getEvictionCount() { |
| return evictionCount; |
| } |
| |
| private TabularData asTabularData(ArrayList<QueryStatsData> list) { |
| TabularDataSupport tds = null; |
| try { |
| CompositeType ct = QueryStatsCompositeTypeFactory.getCompositeType(); |
| TabularType tt = new TabularType(QueryStatsData.class.getName(), |
| "Query History", ct, QueryStatsCompositeTypeFactory.index); |
| tds = new TabularDataSupport(tt); |
| int position = 1; |
| for (QueryStatsData q : list) { |
| tds.put(new CompositeDataSupport(ct, |
| QueryStatsCompositeTypeFactory.names, |
| QueryStatsCompositeTypeFactory.getValues(q, position++))); |
| } |
| return tds; |
| } catch (Exception e) { |
| log.debug("Error", e); |
| return null; |
| } |
| } |
| |
| private static class QueryStatsCompositeTypeFactory { |
| |
| private final static String[] index = { "position" }; |
| |
| private final static String[] names = { "position", |
| "maxTimeMillis", "totalTimeMillis", "executeCount", |
| "rowsRead", "rowsScanned", "maxRowsScanned", |
| "language", "statement", "lastExecuted", |
| "lastThread"}; |
| |
| private final static String[] descriptions = names; |
| |
| @SuppressWarnings("rawtypes") |
| private final static OpenType[] types = { SimpleType.LONG, |
| SimpleType.LONG, SimpleType.LONG, SimpleType.LONG, |
| SimpleType.LONG, SimpleType.LONG, SimpleType.LONG, |
| SimpleType.STRING, SimpleType.STRING, SimpleType.STRING, |
| SimpleType.STRING}; |
| |
| public static CompositeType getCompositeType() throws OpenDataException { |
| return new CompositeType(QueryStatsMBean.class.getName(), |
| QueryStatsMBean.class.getName(), names, descriptions, types); |
| } |
| |
| public static Object[] getValues(QueryStatsData q, int position) { |
| return new Object[] { (long) position, |
| q.getMaxTimeNanos() / 1000000, q.getTotalTimeNanos() / 1000000, q.getExecuteCount(), |
| q.getTotalRowsRead(), q.getTotalRowsScanned(), q.getMaxRowsScanned(), |
| q.getLanguage(), q.getQuery(), QueryStatsData.getTimeString(q.getLastExecutedMillis()), |
| q.isInternal() ? "(internal query)" : q.getLastThreadName()}; |
| } |
| } |
| |
| } |