Track metrics at a keyspace level Patch by brandonwilliams, reviewed by yukim for CASSANDRA-6539
Project: http://git-wip-us.apache.org/repos/asf/cassandra/repo Commit: http://git-wip-us.apache.org/repos/asf/cassandra/commit/cecd1da3 Tree: http://git-wip-us.apache.org/repos/asf/cassandra/tree/cecd1da3 Diff: http://git-wip-us.apache.org/repos/asf/cassandra/diff/cecd1da3 Branch: refs/heads/trunk Commit: cecd1da318f19139446db526be035fb25e1c5b12 Parents: f1aa49b Author: Brandon Williams <brandonwilli...@apache.org> Authored: Thu Jun 12 18:42:21 2014 -0500 Committer: Brandon Williams <brandonwilli...@apache.org> Committed: Fri Jun 13 07:47:12 2014 -0500 ---------------------------------------------------------------------- src/java/org/apache/cassandra/db/Keyspace.java | 2 +- .../cassandra/metrics/KeyspaceMetrics.java | 202 +++++++++++++++++++ 2 files changed, 203 insertions(+), 1 deletion(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/cassandra/blob/cecd1da3/src/java/org/apache/cassandra/db/Keyspace.java ---------------------------------------------------------------------- diff --git a/src/java/org/apache/cassandra/db/Keyspace.java b/src/java/org/apache/cassandra/db/Keyspace.java index 9651794..06df066 100644 --- a/src/java/org/apache/cassandra/db/Keyspace.java +++ b/src/java/org/apache/cassandra/db/Keyspace.java @@ -76,8 +76,8 @@ public class Keyspace /* ColumnFamilyStore per column family */ private final ConcurrentMap<UUID, ColumnFamilyStore> columnFamilyStores = new ConcurrentHashMap<UUID, ColumnFamilyStore>(); private volatile AbstractReplicationStrategy replicationStrategy; - public static final Function<String,Keyspace> keyspaceTransformer = new Function<String, Keyspace>() public final KeyspaceMetrics metric; + public static final Function<String,Keyspace> keyspaceTransformer = new Function<String, Keyspace>() { public Keyspace apply(String keyspaceName) { http://git-wip-us.apache.org/repos/asf/cassandra/blob/cecd1da3/src/java/org/apache/cassandra/metrics/KeyspaceMetrics.java ---------------------------------------------------------------------- diff --git a/src/java/org/apache/cassandra/metrics/KeyspaceMetrics.java b/src/java/org/apache/cassandra/metrics/KeyspaceMetrics.java new file mode 100644 index 0000000..4a0980f --- /dev/null +++ b/src/java/org/apache/cassandra/metrics/KeyspaceMetrics.java @@ -0,0 +1,202 @@ +/* + * 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.cassandra.metrics; + +import java.util.ArrayList; +import java.util.List; + +import com.yammer.metrics.Metrics; +import com.yammer.metrics.core.*; +import com.yammer.metrics.stats.Snapshot; + +import org.apache.cassandra.db.ColumnFamilyStore; +import org.apache.cassandra.db.Keyspace; + +/** + * Metrics for {@link ColumnFamilyStore}. + */ +public class KeyspaceMetrics +{ + /** Total amount of data stored in the memtable, including column related overhead. */ + public final Gauge<Long> memtableDataSize; + /** Total amount of data stored in the memtables (2i and pending flush memtables included). */ + public final Gauge<Long> allMemtablesDataSize; + /** Total number of columns present in the memtable. */ + public final Gauge<Long> memtableColumnsCount; + /** Number of times flush has resulted in the memtable being switched out. */ + public final Gauge<Long> memtableSwitchCount; + /** Estimated number of tasks pending for this column family */ + public final Gauge<Integer> pendingTasks; + /** Estimate of number of pending compactios for this CF */ + public final Gauge<Integer> pendingCompactions; + /** Disk space used by SSTables belonging to this CF */ + public final Gauge<Long> liveDiskSpaceUsed; + /** Total disk space used by SSTables belonging to this CF, including obsolete ones waiting to be GC'd */ + public final Gauge<Long> totalDiskSpaceUsed; + /** Disk space used by bloom filter */ + public final Gauge<Long> bloomFilterDiskSpaceUsed; + + private final MetricNameFactory factory; + + /** + * Creates metrics for given {@link ColumnFamilyStore}. + * + * @param ks Keyspace to measure metrics + */ + public KeyspaceMetrics(final Keyspace ks) + { + factory = new KeyspaceMetricNameFactory(ks); + + memtableColumnsCount = Metrics.newGauge(factory.createMetricName("MemtableColumnsCount"), new Gauge<Long>() + { + public Long value() + { + long total = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + { + total += cf.metric.memtableColumnsCount.value(); + } + return total; + } + }); + memtableDataSize = Metrics.newGauge(factory.createMetricName("MemtableDataSize"), new Gauge<Long>() + { + public Long value() + { + long total = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + { + total += cf.metric.memtableDataSize.value(); + } + return total; + } + }); + allMemtablesDataSize = Metrics.newGauge(factory.createMetricName("AllMemtablesDataSize"), new Gauge<Long>() + { + public Long value() + { + long total = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + { + total += cf.metric.allMemtablesDataSize.value(); + } + return total; + } + }); + memtableSwitchCount = Metrics.newGauge(factory.createMetricName("MemtableSwitchCount"), new Gauge<Long>() + { + public Long value() + { + long sum = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + sum += cf.metric.memtableSwitchCount.count(); + return sum; + } + }); + pendingCompactions = Metrics.newGauge(factory.createMetricName("PendingCompactions"), new Gauge<Integer>() + { + public Integer value() + { + int sum = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + { + sum += cf.metric.pendingCompactions.value(); + } + return sum; + } + }); + pendingTasks = Metrics.newGauge(factory.createMetricName("PendingTasks"), new Gauge<Integer>() + { + public Integer value() + { + return Keyspace.switchLock.getQueueLength(); + } + }); + liveDiskSpaceUsed = Metrics.newGauge(factory.createMetricName("LiveDiskSpaceUsed"), new Gauge<Long>() + { + public Long value() + { + long sum = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + { + sum += cf.metric.liveDiskSpaceUsed.count(); + } + return sum; + } + }); + totalDiskSpaceUsed = Metrics.newGauge(factory.createMetricName("TotalDiskSpaceUsed"), new Gauge<Long>() + { + public Long value() + { + long sum = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + { + sum += cf.metric.totalDiskSpaceUsed.count(); + } + return sum; + } + }); + bloomFilterDiskSpaceUsed = Metrics.newGauge(factory.createMetricName("BloomFilterDiskSpaceUsed"), new Gauge<Long>() + { + public Long value() + { + long total = 0; + for (ColumnFamilyStore cf : ks.getColumnFamilyStores()) + total += cf.metric.bloomFilterDiskSpaceUsed.value(); + return total; + } + }); + } + + /** + * Release all associated metrics. + */ + public void release() + { + Metrics.defaultRegistry().removeMetric(factory.createMetricName("AllMemtablesDataSize")); + Metrics.defaultRegistry().removeMetric(factory.createMetricName("MemtableDataSize")); + Metrics.defaultRegistry().removeMetric(factory.createMetricName("MemtableSwitchCount")); + Metrics.defaultRegistry().removeMetric(factory.createMetricName("PendingTasks")); + Metrics.defaultRegistry().removeMetric(factory.createMetricName("LiveDiskSpaceUsed")); + Metrics.defaultRegistry().removeMetric(factory.createMetricName("TotalDiskSpaceUsed")); + Metrics.defaultRegistry().removeMetric(factory.createMetricName("BloomFilterDiskSpaceUsed")); + } + + class KeyspaceMetricNameFactory implements MetricNameFactory + { + private final String keyspaceName; + + KeyspaceMetricNameFactory(Keyspace ks) + { + this.keyspaceName = ks.getName(); + } + + public MetricName createMetricName(String metricName) + { + String groupName = ColumnFamilyMetrics.class.getPackage().getName(); + + StringBuilder mbeanName = new StringBuilder(); + mbeanName.append(groupName).append(":"); + mbeanName.append("type=Keyspace"); + mbeanName.append(",keyspace=").append(keyspaceName); + mbeanName.append(",name=").append(metricName); + + return new MetricName(groupName, "keyspace", metricName, keyspaceName, mbeanName.toString()); + } + } +}