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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumMap;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.TimeUnit;
import java.util.function.Predicate;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import org.apache.commons.lang3.ArrayUtils;
import com.codahale.metrics.Counter;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Histogram;
import com.codahale.metrics.Meter;
import com.codahale.metrics.Metric;
import com.codahale.metrics.Timer;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.db.lifecycle.SSTableSet;
import org.apache.cassandra.db.lifecycle.View;
import org.apache.cassandra.db.memtable.Memtable;
import org.apache.cassandra.index.SecondaryIndexManager;
import org.apache.cassandra.io.compress.CompressionMetadata;
import org.apache.cassandra.io.sstable.GaugeProvider;
import org.apache.cassandra.io.sstable.format.SSTableFormat;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.apache.cassandra.io.sstable.metadata.MetadataCollector;
import org.apache.cassandra.metrics.Sampler.SamplerType;
import org.apache.cassandra.schema.Schema;
import org.apache.cassandra.schema.SchemaConstants;
import org.apache.cassandra.utils.EstimatedHistogram;
import org.apache.cassandra.utils.ExpMovingAverage;
import org.apache.cassandra.utils.MovingAverage;
import org.apache.cassandra.utils.Pair;
import static java.util.concurrent.TimeUnit.MICROSECONDS;
import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics;
import static org.apache.cassandra.utils.Clock.Global.nanoTime;
/**
* Metrics for {@link ColumnFamilyStore}.
*/
public class TableMetrics
{
/**
* stores metrics that will be rolled into a single global metric
*/
private static final ConcurrentMap> ALL_TABLE_METRICS = Maps.newConcurrentMap();
public static final long[] EMPTY = new long[0];
private static final MetricNameFactory GLOBAL_FACTORY = new AllTableMetricNameFactory("Table");
private static final MetricNameFactory GLOBAL_ALIAS_FACTORY = new AllTableMetricNameFactory("ColumnFamily");
public final static LatencyMetrics GLOBAL_READ_LATENCY = new LatencyMetrics(GLOBAL_FACTORY, GLOBAL_ALIAS_FACTORY, "Read");
public final static LatencyMetrics GLOBAL_WRITE_LATENCY = new LatencyMetrics(GLOBAL_FACTORY, GLOBAL_ALIAS_FACTORY, "Write");
public final static LatencyMetrics GLOBAL_RANGE_LATENCY = new LatencyMetrics(GLOBAL_FACTORY, GLOBAL_ALIAS_FACTORY, "Range");
/** Total amount of data stored in the memtable that resides on-heap, including column related overhead and partitions overwritten. */
public final Gauge memtableOnHeapDataSize;
/** Total amount of data stored in the memtable that resides off-heap, including column related overhead and partitions overwritten. */
public final Gauge memtableOffHeapDataSize;
/** Total amount of live data stored in the memtable, excluding any data structure overhead */
public final Gauge memtableLiveDataSize;
/** Total amount of data stored in the memtables (2i and pending flush memtables included) that resides on-heap. */
public final Gauge allMemtablesOnHeapDataSize;
/** Total amount of data stored in the memtables (2i and pending flush memtables included) that resides off-heap. */
public final Gauge allMemtablesOffHeapDataSize;
/** Total amount of live data stored in the memtables (2i and pending flush memtables included) that resides off-heap, excluding any data structure overhead */
public final Gauge allMemtablesLiveDataSize;
/** Total number of columns present in the memtable. */
public final Gauge memtableColumnsCount;
/** Number of times flush has resulted in the memtable being switched out. */
public final Counter memtableSwitchCount;
/** Current compression ratio for all SSTables */
public final Gauge compressionRatio;
/** Histogram of estimated partition size (in bytes). */
public final Gauge estimatedPartitionSizeHistogram;
/** Approximate number of keys in table. */
public final Gauge estimatedPartitionCount;
/** Histogram of estimated number of columns. */
public final Gauge estimatedColumnCountHistogram;
/** Histogram of the number of sstable data files accessed per single partition read */
public final TableHistogram sstablesPerReadHistogram;
/** Histogram of the number of sstable data files accessed per partition range read */
public final TableHistogram sstablesPerRangeReadHistogram;
/** (Local) read metrics */
public final LatencyMetrics readLatency;
/** (Local) range slice metrics */
public final LatencyMetrics rangeLatency;
/** (Local) write metrics */
public final LatencyMetrics writeLatency;
/** Estimated number of tasks pending for this table */
public final Counter pendingFlushes;
/** Total number of bytes flushed since server [re]start */
public final Counter bytesFlushed;
/** The average on-disk flushed size for sstables. */
public final MovingAverage flushSizeOnDisk;
/** Total number of bytes written by compaction since server [re]start */
public final Counter compactionBytesWritten;
/** Estimate of number of pending compactios for this table */
public final Gauge pendingCompactions;
/** Number of SSTables on disk for this CF */
public final Gauge liveSSTableCount;
/** Number of SSTables with old version on disk for this CF */
public final Gauge oldVersionSSTableCount;
/** Maximum duration of an SSTable for this table, computed as maxTimestamp - minTimestamp*/
public final Gauge maxSSTableDuration;
/** Maximum size of SSTable of this table - the physical size on disk of all components for such SSTable in bytes*/
public final Gauge maxSSTableSize;
/** Disk space used by SSTables belonging to this table */
public final Counter liveDiskSpaceUsed;
/** Uncompressed/logical disk space used by SSTables belonging to this table */
public final Counter uncompressedLiveDiskSpaceUsed;
/** Total disk space used by SSTables belonging to this table, including obsolete ones waiting to be GC'd */
public final Counter totalDiskSpaceUsed;
/** Size of the smallest compacted partition */
public final Gauge minPartitionSize;
/** Size of the largest compacted partition */
public final Gauge maxPartitionSize;
/** Size of the smallest compacted partition */
public final Gauge meanPartitionSize;
/** Off heap memory used by compression meta data*/
public final Gauge compressionMetadataOffHeapMemoryUsed;
/** Tombstones scanned in queries on this CF */
public final TableHistogram tombstoneScannedHistogram;
/** Live rows scanned in queries on this CF */
public final TableHistogram liveScannedHistogram;
/** Column update time delta on this CF */
public final TableHistogram colUpdateTimeDeltaHistogram;
/** time taken acquiring the partition lock for materialized view updates for this table */
public final TableTimer viewLockAcquireTime;
/** time taken during the local read of a materialized view update */
public final TableTimer viewReadTime;
/** Disk space used by snapshot files which */
public final Gauge trueSnapshotsSize;
/** Row cache hits, but result out of range */
public final Counter rowCacheHitOutOfRange;
/** Number of row cache hits */
public final Counter rowCacheHit;
/** Number of row cache misses */
public final Counter rowCacheMiss;
/**
* Number of tombstone read failures
*/
public final Counter tombstoneFailures;
/**
* Number of tombstone read warnings
*/
public final Counter tombstoneWarnings;
/** CAS Prepare metrics */
public final LatencyMetrics casPrepare;
/** CAS Propose metrics */
public final LatencyMetrics casPropose;
/** CAS Commit metrics */
public final LatencyMetrics casCommit;
/** percent of the data that is repaired */
public final Gauge percentRepaired;
/** Reports the size of sstables in repaired, unrepaired, and any ongoing repair buckets */
public final Gauge bytesRepaired;
public final Gauge bytesUnrepaired;
public final Gauge bytesPendingRepair;
/** Number of started repairs as coordinator on this table */
public final Counter repairsStarted;
/** Number of completed repairs as coordinator on this table */
public final Counter repairsCompleted;
/** time spent anticompacting data before participating in a consistent repair */
public final TableTimer anticompactionTime;
/** time spent creating merkle trees */
public final TableTimer validationTime;
/** time spent syncing data in a repair */
public final TableTimer repairSyncTime;
/** approximate number of bytes read while creating merkle trees */
public final TableHistogram bytesValidated;
/** number of partitions read creating merkle trees */
public final TableHistogram partitionsValidated;
/** number of bytes read while doing anticompaction */
public final Counter bytesAnticompacted;
/** number of bytes where the whole sstable was contained in a repairing range so that we only mutated the repair status */
public final Counter bytesMutatedAnticompaction;
/** ratio of how much we anticompact vs how much we could mutate the repair status*/
public final Gauge mutatedAnticompactionGauge;
public final SnapshottingTimer coordinatorReadLatency;
public final Timer coordinatorScanLatency;
public final SnapshottingTimer coordinatorWriteLatency;
private final MetricNameFactory factory;
private final MetricNameFactory aliasFactory;
public final Counter speculativeRetries;
public final Counter speculativeFailedRetries;
public final Counter speculativeInsufficientReplicas;
public final Gauge speculativeSampleLatencyNanos;
public final Counter additionalWrites;
public final Gauge additionalWriteLatencyNanos;
public final Gauge unleveledSSTables;
/**
* Metrics for inconsistencies detected between repaired data sets across replicas. These
* are tracked on the coordinator.
*/
// Incremented where an inconsistency is detected and there are no pending repair sessions affecting
// the data being read, indicating a genuine mismatch between replicas' repaired data sets.
public final TableMeter confirmedRepairedInconsistencies;
// Incremented where an inconsistency is detected, but there are pending & uncommitted repair sessions
// in play on at least one replica. This may indicate a false positive as the inconsistency could be due to
// replicas marking the repair session as committed at slightly different times and so some consider it to
// be part of the repaired set whilst others do not.
public final TableMeter unconfirmedRepairedInconsistencies;
// Tracks the amount overreading of repaired data replicas perform in order to produce digests
// at query time. For each query, on a full data read following an initial digest mismatch, the replicas
// may read extra repaired data, up to the DataLimit of the command, so that the coordinator can compare
// the repaired data on each replica. These are tracked on each replica.
public final TableHistogram repairedDataTrackingOverreadRows;
public final TableTimer repairedDataTrackingOverreadTime;
/** When sampler activated, will track the most frequently read partitions **/
public final Sampler topReadPartitionFrequency;
/** When sampler activated, will track the most frequently written to partitions **/
public final Sampler topWritePartitionFrequency;
/** When sampler activated, will track the largest mutations **/
public final Sampler topWritePartitionSize;
/** When sampler activated, will track the most frequent partitions with cas contention **/
public final Sampler topCasPartitionContention;
/** When sampler activated, will track the slowest local reads **/
public final Sampler topLocalReadQueryTime;
/** When sampler activated, will track partitions read with the most rows **/
public final Sampler topReadPartitionRowCount;
/** When sampler activated, will track partitions read with the most tombstones **/
public final Sampler topReadPartitionTombstoneCount;
/** When sample activated, will track partitions read with the most merged sstables **/
public final Sampler topReadPartitionSSTableCount;
public final TableMeter clientTombstoneWarnings;
public final TableMeter clientTombstoneAborts;
public final TableMeter coordinatorReadSizeWarnings;
public final TableMeter coordinatorReadSizeAborts;
public final TableHistogram coordinatorReadSize;
public final TableMeter localReadSizeWarnings;
public final TableMeter localReadSizeAborts;
public final TableHistogram localReadSize;
public final TableMeter rowIndexSizeWarnings;
public final TableMeter rowIndexSizeAborts;
public final TableHistogram rowIndexSize;
public final TableMeter tooManySSTableIndexesReadWarnings;
public final TableMeter tooManySSTableIndexesReadAborts;
public final ImmutableMap, ImmutableMap>> formatSpecificGauges;
private static Pair totalNonSystemTablesSize(Predicate predicate)
{
long total = 0;
long filtered = 0;
for (String keyspace : Schema.instance.distributedKeyspaces().names())
{
Keyspace k = Schema.instance.getKeyspaceInstance(keyspace);
if (SchemaConstants.DISTRIBUTED_KEYSPACE_NAME.equals(k.getName()))
continue;
if (k.getReplicationStrategy().getReplicationFactor().allReplicas < 2)
continue;
for (ColumnFamilyStore cf : k.getColumnFamilyStores())
{
if (!SecondaryIndexManager.isIndexColumnFamily(cf.name))
{
for (SSTableReader sstable : cf.getSSTables(SSTableSet.CANONICAL))
{
if (predicate.test(sstable))
{
filtered += sstable.uncompressedLength();
}
total += sstable.uncompressedLength();
}
}
}
}
return Pair.create(filtered, total);
}
public static final Gauge globalPercentRepaired = Metrics.register(GLOBAL_FACTORY.createMetricName("PercentRepaired"),
new Gauge()
{
public Double getValue()
{
Pair result = totalNonSystemTablesSize(SSTableReader::isRepaired);
double repaired = result.left;
double total = result.right;
return total > 0 ? (repaired / total) * 100 : 100.0;
}
});
public static final Gauge globalBytesRepaired = Metrics.register(GLOBAL_FACTORY.createMetricName("BytesRepaired"),
() -> totalNonSystemTablesSize(SSTableReader::isRepaired).left);
public static final Gauge globalBytesUnrepaired =
Metrics.register(GLOBAL_FACTORY.createMetricName("BytesUnrepaired"),
() -> totalNonSystemTablesSize(s -> !s.isRepaired() && !s.isPendingRepair()).left);
public static final Gauge globalBytesPendingRepair =
Metrics.register(GLOBAL_FACTORY.createMetricName("BytesPendingRepair"),
() -> totalNonSystemTablesSize(SSTableReader::isPendingRepair).left);
public final Meter readRepairRequests;
public final Meter shortReadProtectionRequests;
public final Meter replicaFilteringProtectionRequests;
/**
* This histogram records the maximum number of rows {@link org.apache.cassandra.service.reads.ReplicaFilteringProtection}
* caches at a point in time per query. With no replica divergence, this is equivalent to the maximum number of
* cached rows in a single partition during a query. It can be helpful when choosing appropriate values for the
* replica_filtering_protection thresholds in cassandra.yaml.
*/
public final Histogram rfpRowsCachedPerQuery;
public final EnumMap> samplers;
/**
* Stores all metrics created that can be used when unregistering
*/
private final Set all = Sets.newHashSet();
private interface GetHistogram
{
EstimatedHistogram getHistogram(SSTableReader reader);
}
private static long[] combineHistograms(Iterable sstables, GetHistogram getHistogram)
{
Iterator iterator = sstables.iterator();
if (!iterator.hasNext())
{
return ArrayUtils.EMPTY_LONG_ARRAY;
}
long[] firstBucket = getHistogram.getHistogram(iterator.next()).getBuckets(false);
long[] values = Arrays.copyOf(firstBucket, firstBucket.length);
while (iterator.hasNext())
{
long[] nextBucket = getHistogram.getHistogram(iterator.next()).getBuckets(false);
values = addHistogram(values, nextBucket);
}
return values;
}
@VisibleForTesting
public static long[] addHistogram(long[] sums, long[] buckets)
{
if (buckets.length > sums.length)
{
sums = Arrays.copyOf(sums, buckets.length);
}
for (int i = 0; i < buckets.length; i++)
{
sums[i] += buckets[i];
}
return sums;
}
/**
* Creates metrics for given {@link ColumnFamilyStore}.
*
* @param cfs ColumnFamilyStore to measure metrics
*/
public TableMetrics(final ColumnFamilyStore cfs, ReleasableMetric memtableMetrics)
{
factory = new TableMetricNameFactory(cfs, "Table");
aliasFactory = new TableMetricNameFactory(cfs, "ColumnFamily");
if (memtableMetrics != null)
{
all.add(memtableMetrics);
}
samplers = new EnumMap<>(SamplerType.class);
topReadPartitionFrequency = new FrequencySampler()
{
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
topWritePartitionFrequency = new FrequencySampler()
{
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
topWritePartitionSize = new MaxSampler()
{
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
topCasPartitionContention = new FrequencySampler()
{
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
topLocalReadQueryTime = new MaxSampler()
{
public String toString(String value)
{
return value;
}
};
topReadPartitionRowCount = new MaxSampler()
{
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
topReadPartitionTombstoneCount = new MaxSampler()
{
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
topReadPartitionSSTableCount = new MaxSampler()
{
@Override
public String toString(ByteBuffer value)
{
return cfs.metadata().partitionKeyType.getString(value);
}
};
samplers.put(SamplerType.READS, topReadPartitionFrequency);
samplers.put(SamplerType.WRITES, topWritePartitionFrequency);
samplers.put(SamplerType.WRITE_SIZE, topWritePartitionSize);
samplers.put(SamplerType.CAS_CONTENTIONS, topCasPartitionContention);
samplers.put(SamplerType.LOCAL_READ_TIME, topLocalReadQueryTime);
samplers.put(SamplerType.READ_ROW_COUNT, topReadPartitionRowCount);
samplers.put(SamplerType.READ_TOMBSTONE_COUNT, topReadPartitionTombstoneCount);
samplers.put(SamplerType.READ_SSTABLE_COUNT, topReadPartitionSSTableCount);
memtableColumnsCount = createTableGauge("MemtableColumnsCount",
() -> cfs.getTracker().getView().getCurrentMemtable().operationCount());
// MemtableOnHeapSize naming deprecated in 4.0
memtableOnHeapDataSize = createTableGaugeWithDeprecation("MemtableOnHeapDataSize", "MemtableOnHeapSize",
() -> Memtable.getMemoryUsage(cfs.getTracker().getView().getCurrentMemtable()).ownsOnHeap,
new GlobalTableGauge("MemtableOnHeapDataSize"));
// MemtableOffHeapSize naming deprecated in 4.0
memtableOffHeapDataSize = createTableGaugeWithDeprecation("MemtableOffHeapDataSize", "MemtableOffHeapSize",
() -> Memtable.getMemoryUsage(cfs.getTracker().getView().getCurrentMemtable()).ownsOffHeap,
new GlobalTableGauge("MemtableOnHeapDataSize"));
memtableLiveDataSize = createTableGauge("MemtableLiveDataSize",
() -> cfs.getTracker().getView().getCurrentMemtable().getLiveDataSize());
// AllMemtablesHeapSize naming deprecated in 4.0
allMemtablesOnHeapDataSize = createTableGaugeWithDeprecation("AllMemtablesOnHeapDataSize", "AllMemtablesHeapSize", new Gauge()
{
public Long getValue()
{
return getMemoryUsageWithIndexes(cfs).ownsOnHeap;
}
}, new GlobalTableGauge("AllMemtablesOnHeapDataSize"));
// AllMemtablesOffHeapSize naming deprecated in 4.0
allMemtablesOffHeapDataSize = createTableGaugeWithDeprecation("AllMemtablesOffHeapDataSize", "AllMemtablesOffHeapSize", new Gauge()
{
public Long getValue()
{
return getMemoryUsageWithIndexes(cfs).ownsOffHeap;
}
}, new GlobalTableGauge("AllMemtablesOffHeapDataSize"));
allMemtablesLiveDataSize = createTableGauge("AllMemtablesLiveDataSize", new Gauge()
{
public Long getValue()
{
long size = 0;
for (ColumnFamilyStore cfs2 : cfs.concatWithIndexes())
size += cfs2.getTracker().getView().getCurrentMemtable().getLiveDataSize();
return size;
}
});
memtableSwitchCount = createTableCounter("MemtableSwitchCount");
estimatedPartitionSizeHistogram = createTableGauge("EstimatedPartitionSizeHistogram", "EstimatedRowSizeHistogram",
() -> combineHistograms(cfs.getSSTables(SSTableSet.CANONICAL),
SSTableReader::getEstimatedPartitionSize), null);
estimatedPartitionCount = createTableGauge("EstimatedPartitionCount", "EstimatedRowCount", new Gauge()
{
public Long getValue()
{
long memtablePartitions = 0;
for (Memtable memtable : cfs.getTracker().getView().getAllMemtables())
memtablePartitions += memtable.partitionCount();
try(ColumnFamilyStore.RefViewFragment refViewFragment = cfs.selectAndReference(View.selectFunction(SSTableSet.CANONICAL)))
{
return SSTableReader.getApproximateKeyCount(refViewFragment.sstables) + memtablePartitions;
}
}
}, null);
estimatedColumnCountHistogram = createTableGauge("EstimatedColumnCountHistogram", "EstimatedColumnCountHistogram",
() -> combineHistograms(cfs.getSSTables(SSTableSet.CANONICAL),
SSTableReader::getEstimatedCellPerPartitionCount), null);
sstablesPerReadHistogram = createTableHistogram("SSTablesPerReadHistogram", cfs.keyspace.metric.sstablesPerReadHistogram, true);
sstablesPerRangeReadHistogram = createTableHistogram("SSTablesPerRangeReadHistogram", cfs.keyspace.metric.sstablesPerRangeReadHistogram, true);
compressionRatio = createTableGauge("CompressionRatio", new Gauge()
{
public Double getValue()
{
return computeCompressionRatio(cfs.getSSTables(SSTableSet.CANONICAL));
}
}, new Gauge() // global gauge
{
public Double getValue()
{
List sstables = new ArrayList<>();
Keyspace.all().forEach(ks -> sstables.addAll(ks.getAllSSTables(SSTableSet.CANONICAL)));
return computeCompressionRatio(sstables);
}
});
percentRepaired = createTableGauge("PercentRepaired", new Gauge()
{
public Double getValue()
{
double repaired = 0;
double total = 0;
for (SSTableReader sstable : cfs.getSSTables(SSTableSet.CANONICAL))
{
if (sstable.isRepaired())
{
repaired += sstable.uncompressedLength();
}
total += sstable.uncompressedLength();
}
return total > 0 ? (repaired / total) * 100 : 100.0;
}
});
bytesRepaired = createTableGauge("BytesRepaired", new Gauge()
{
public Long getValue()
{
long size = 0;
for (SSTableReader sstable: Iterables.filter(cfs.getSSTables(SSTableSet.CANONICAL), SSTableReader::isRepaired))
{
size += sstable.uncompressedLength();
}
return size;
}
});
bytesUnrepaired = createTableGauge("BytesUnrepaired", new Gauge()
{
public Long getValue()
{
long size = 0;
for (SSTableReader sstable: Iterables.filter(cfs.getSSTables(SSTableSet.CANONICAL), s -> !s.isRepaired() && !s.isPendingRepair()))
{
size += sstable.uncompressedLength();
}
return size;
}
});
bytesPendingRepair = createTableGauge("BytesPendingRepair", new Gauge()
{
public Long getValue()
{
long size = 0;
for (SSTableReader sstable: Iterables.filter(cfs.getSSTables(SSTableSet.CANONICAL), SSTableReader::isPendingRepair))
{
size += sstable.uncompressedLength();
}
return size;
}
});
readLatency = createLatencyMetrics("Read", cfs.keyspace.metric.readLatency, GLOBAL_READ_LATENCY);
writeLatency = createLatencyMetrics("Write", cfs.keyspace.metric.writeLatency, GLOBAL_WRITE_LATENCY);
rangeLatency = createLatencyMetrics("Range", cfs.keyspace.metric.rangeLatency, GLOBAL_RANGE_LATENCY);
pendingFlushes = createTableCounter("PendingFlushes");
bytesFlushed = createTableCounter("BytesFlushed");
flushSizeOnDisk = ExpMovingAverage.decayBy1000();
compactionBytesWritten = createTableCounter("CompactionBytesWritten");
pendingCompactions = createTableGauge("PendingCompactions", () -> cfs.getCompactionStrategyManager().getEstimatedRemainingTasks());
liveSSTableCount = createTableGauge("LiveSSTableCount", () -> cfs.getTracker().getView().liveSSTables().size());
oldVersionSSTableCount = createTableGauge("OldVersionSSTableCount", new Gauge()
{
public Integer getValue()
{
int count = 0;
for (SSTableReader sstable : cfs.getLiveSSTables())
if (!sstable.descriptor.version.isLatestVersion())
count++;
return count;
}
});
maxSSTableDuration = createTableGauge("MaxSSTableDuration", new Gauge()
{
@Override
public Long getValue()
{
return cfs.getTracker()
.getView()
.liveSSTables()
.stream()
.filter(sstable -> sstable.getMinTimestamp() != Long.MAX_VALUE && sstable.getMaxTimestamp() != Long.MAX_VALUE)
.map(ssTableReader -> ssTableReader.getMaxTimestamp() - ssTableReader.getMinTimestamp())
.max(Long::compare)
.orElse(0L) / 1000;
}
});
maxSSTableSize = createTableGauge("MaxSSTableSize", new Gauge()
{
@Override
public Long getValue()
{
return cfs.getTracker()
.getView()
.liveSSTables()
.stream()
.map(SSTableReader::bytesOnDisk)
.max(Long::compare)
.orElse(0L);
}
});
liveDiskSpaceUsed = createTableCounter("LiveDiskSpaceUsed");
uncompressedLiveDiskSpaceUsed = createTableCounter("UncompressedLiveDiskSpaceUsed");
totalDiskSpaceUsed = createTableCounter("TotalDiskSpaceUsed");
minPartitionSize = createTableGauge("MinPartitionSize", "MinRowSize", new Gauge()
{
public Long getValue()
{
long min = 0;
for (SSTableReader sstable : cfs.getSSTables(SSTableSet.CANONICAL))
{
if (min == 0 || sstable.getEstimatedPartitionSize().min() < min)
min = sstable.getEstimatedPartitionSize().min();
}
return min;
}
}, new Gauge() // global gauge
{
public Long getValue()
{
long min = Long.MAX_VALUE;
for (Metric cfGauge : ALL_TABLE_METRICS.get("MinPartitionSize"))
{
min = Math.min(min, ((Gauge) cfGauge).getValue().longValue());
}
return min;
}
});
maxPartitionSize = createTableGauge("MaxPartitionSize", "MaxRowSize", new Gauge()
{
public Long getValue()
{
long max = 0;
for (SSTableReader sstable : cfs.getSSTables(SSTableSet.CANONICAL))
{
if (sstable.getEstimatedPartitionSize().max() > max)
max = sstable.getEstimatedPartitionSize().max();
}
return max;
}
}, new Gauge() // global gauge
{
public Long getValue()
{
long max = 0;
for (Metric cfGauge : ALL_TABLE_METRICS.get("MaxPartitionSize"))
{
max = Math.max(max, ((Gauge) cfGauge).getValue().longValue());
}
return max;
}
});
meanPartitionSize = createTableGauge("MeanPartitionSize", "MeanRowSize", new Gauge()
{
public Long getValue()
{
long sum = 0;
long count = 0;
for (SSTableReader sstable : cfs.getSSTables(SSTableSet.CANONICAL))
{
long n = sstable.getEstimatedPartitionSize().count();
sum += sstable.getEstimatedPartitionSize().mean() * n;
count += n;
}
return count > 0 ? sum / count : 0;
}
}, new Gauge() // global gauge
{
public Long getValue()
{
long sum = 0;
long count = 0;
for (Keyspace keyspace : Keyspace.all())
{
for (SSTableReader sstable : keyspace.getAllSSTables(SSTableSet.CANONICAL))
{
long n = sstable.getEstimatedPartitionSize().count();
sum += sstable.getEstimatedPartitionSize().mean() * n;
count += n;
}
}
return count > 0 ? sum / count : 0;
}
});
compressionMetadataOffHeapMemoryUsed = createTableGauge("CompressionMetadataOffHeapMemoryUsed", new Gauge()
{
public Long getValue()
{
long total = 0;
for (SSTableReader sst : cfs.getSSTables(SSTableSet.LIVE))
total += sst.getCompressionMetadataOffHeapSize();
return total;
}
});
speculativeRetries = createTableCounter("SpeculativeRetries");
speculativeFailedRetries = createTableCounter("SpeculativeFailedRetries");
speculativeInsufficientReplicas = createTableCounter("SpeculativeInsufficientReplicas");
speculativeSampleLatencyNanos = createTableGauge("SpeculativeSampleLatencyNanos", () -> MICROSECONDS.toNanos(cfs.sampleReadLatencyMicros));
additionalWrites = createTableCounter("AdditionalWrites");
additionalWriteLatencyNanos = createTableGauge("AdditionalWriteLatencyNanos", () -> MICROSECONDS.toNanos(cfs.additionalWriteLatencyMicros));
tombstoneScannedHistogram = createTableHistogram("TombstoneScannedHistogram", cfs.keyspace.metric.tombstoneScannedHistogram, false);
liveScannedHistogram = createTableHistogram("LiveScannedHistogram", cfs.keyspace.metric.liveScannedHistogram, false);
colUpdateTimeDeltaHistogram = createTableHistogram("ColUpdateTimeDeltaHistogram", cfs.keyspace.metric.colUpdateTimeDeltaHistogram, false);
coordinatorReadLatency = createTableTimer("CoordinatorReadLatency");
coordinatorScanLatency = createTableTimer("CoordinatorScanLatency");
coordinatorWriteLatency = createTableTimer("CoordinatorWriteLatency");
// We do not want to capture view mutation specific metrics for a view
// They only makes sense to capture on the base table
if (cfs.metadata().isView())
{
viewLockAcquireTime = null;
viewReadTime = null;
}
else
{
viewLockAcquireTime = createTableTimer("ViewLockAcquireTime", cfs.keyspace.metric.viewLockAcquireTime);
viewReadTime = createTableTimer("ViewReadTime", cfs.keyspace.metric.viewReadTime);
}
trueSnapshotsSize = createTableGauge("SnapshotsSize", cfs::trueSnapshotsSize);
rowCacheHitOutOfRange = createTableCounter("RowCacheHitOutOfRange");
rowCacheHit = createTableCounter("RowCacheHit");
rowCacheMiss = createTableCounter("RowCacheMiss");
tombstoneFailures = createTableCounter("TombstoneFailures");
tombstoneWarnings = createTableCounter("TombstoneWarnings");
casPrepare = createLatencyMetrics("CasPrepare", cfs.keyspace.metric.casPrepare);
casPropose = createLatencyMetrics("CasPropose", cfs.keyspace.metric.casPropose);
casCommit = createLatencyMetrics("CasCommit", cfs.keyspace.metric.casCommit);
repairsStarted = createTableCounter("RepairJobsStarted");
repairsCompleted = createTableCounter("RepairJobsCompleted");
anticompactionTime = createTableTimer("AnticompactionTime", cfs.keyspace.metric.anticompactionTime);
validationTime = createTableTimer("ValidationTime", cfs.keyspace.metric.validationTime);
repairSyncTime = createTableTimer("RepairSyncTime", cfs.keyspace.metric.repairSyncTime);
bytesValidated = createTableHistogram("BytesValidated", cfs.keyspace.metric.bytesValidated, false);
partitionsValidated = createTableHistogram("PartitionsValidated", cfs.keyspace.metric.partitionsValidated, false);
bytesAnticompacted = createTableCounter("BytesAnticompacted");
bytesMutatedAnticompaction = createTableCounter("BytesMutatedAnticompaction");
mutatedAnticompactionGauge = createTableGauge("MutatedAnticompactionGauge", () ->
{
double bytesMutated = bytesMutatedAnticompaction.getCount();
double bytesAnticomp = bytesAnticompacted.getCount();
if (bytesAnticomp + bytesMutated > 0)
return bytesMutated / (bytesAnticomp + bytesMutated);
return 0.0;
});
readRepairRequests = createTableMeter("ReadRepairRequests");
shortReadProtectionRequests = createTableMeter("ShortReadProtectionRequests");
replicaFilteringProtectionRequests = createTableMeter("ReplicaFilteringProtectionRequests");
rfpRowsCachedPerQuery = createHistogram("ReplicaFilteringProtectionRowsCachedPerQuery", true);
confirmedRepairedInconsistencies = createTableMeter("RepairedDataInconsistenciesConfirmed", cfs.keyspace.metric.confirmedRepairedInconsistencies);
unconfirmedRepairedInconsistencies = createTableMeter("RepairedDataInconsistenciesUnconfirmed", cfs.keyspace.metric.unconfirmedRepairedInconsistencies);
repairedDataTrackingOverreadRows = createTableHistogram("RepairedDataTrackingOverreadRows", cfs.keyspace.metric.repairedDataTrackingOverreadRows, false);
repairedDataTrackingOverreadTime = createTableTimer("RepairedDataTrackingOverreadTime", cfs.keyspace.metric.repairedDataTrackingOverreadTime);
unleveledSSTables = createTableGauge("UnleveledSSTables", cfs::getUnleveledSSTables, () -> {
// global gauge
int cnt = 0;
for (Metric cfGauge : ALL_TABLE_METRICS.get("UnleveledSSTables"))
{
cnt += ((Gauge) cfGauge).getValue().intValue();
}
return cnt;
});
clientTombstoneWarnings = createTableMeter("ClientTombstoneWarnings", cfs.keyspace.metric.clientTombstoneWarnings);
clientTombstoneAborts = createTableMeter("ClientTombstoneAborts", cfs.keyspace.metric.clientTombstoneAborts);
coordinatorReadSizeWarnings = createTableMeter("CoordinatorReadSizeWarnings", cfs.keyspace.metric.coordinatorReadSizeWarnings);
coordinatorReadSizeAborts = createTableMeter("CoordinatorReadSizeAborts", cfs.keyspace.metric.coordinatorReadSizeAborts);
coordinatorReadSize = createTableHistogram("CoordinatorReadSize", cfs.keyspace.metric.coordinatorReadSize, false);
localReadSizeWarnings = createTableMeter("LocalReadSizeWarnings", cfs.keyspace.metric.localReadSizeWarnings);
localReadSizeAborts = createTableMeter("LocalReadSizeAborts", cfs.keyspace.metric.localReadSizeAborts);
localReadSize = createTableHistogram("LocalReadSize", cfs.keyspace.metric.localReadSize, false);
rowIndexSizeWarnings = createTableMeter("RowIndexSizeWarnings", cfs.keyspace.metric.rowIndexSizeWarnings);
rowIndexSizeAborts = createTableMeter("RowIndexSizeAborts", cfs.keyspace.metric.rowIndexSizeAborts);
rowIndexSize = createTableHistogram("RowIndexSize", cfs.keyspace.metric.rowIndexSize, false);
tooManySSTableIndexesReadWarnings = createTableMeter("TooManySSTableIndexesReadWarnings", cfs.keyspace.metric.tooManySSTableIndexesReadWarnings);
tooManySSTableIndexesReadAborts = createTableMeter("TooManySSTableIndexesReadAborts", cfs.keyspace.metric.tooManySSTableIndexesReadAborts);
formatSpecificGauges = createFormatSpecificGauges(cfs);
}
private Memtable.MemoryUsage getMemoryUsageWithIndexes(ColumnFamilyStore cfs)
{
Memtable.MemoryUsage usage = Memtable.newMemoryUsage();
cfs.getTracker().getView().getCurrentMemtable().addMemoryUsageTo(usage);
for (ColumnFamilyStore indexCfs : cfs.indexManager.getAllIndexColumnFamilyStores())
indexCfs.getTracker().getView().getCurrentMemtable().addMemoryUsageTo(usage);
return usage;
}
public void updateSSTableIterated(int count)
{
sstablesPerReadHistogram.update(count);
}
public void updateSSTableIteratedInRangeRead(int count)
{
sstablesPerRangeReadHistogram.update(count);
}
/**
* Release all associated metrics.
*/
public void release()
{
for (ReleasableMetric entry : all)
{
entry.release();
}
}
private ImmutableMap, ImmutableMap>> createFormatSpecificGauges(ColumnFamilyStore cfs)
{
ImmutableMap.Builder, ImmutableMap>> builder = ImmutableMap.builder();
for (SSTableFormat format : DatabaseDescriptor.getSSTableFormats().values())
{
ImmutableMap.Builder> gauges = ImmutableMap.builder();
for (GaugeProvider gaugeProvider : format.getFormatSpecificMetricsProviders().getGaugeProviders())
{
Gauge gauge = createTableGauge(gaugeProvider.name, gaugeProvider.getTableGauge(cfs), gaugeProvider.getGlobalGauge());
gauges.put(gaugeProvider.name, gauge);
}
builder.put(format, gauges.build());
}
return builder.build();
}
/**
* Create a gauge that will be part of a merged version of all column families. The global gauge
* will merge each CF gauge by adding their values
*/
protected Gauge createTableGauge(final String name, Gauge gauge)
{
return createTableGauge(name, gauge, new GlobalTableGauge(name));
}
/**
* Create a gauge that will be part of a merged version of all column families. The global gauge
* is defined as the globalGauge parameter
*/
protected Gauge createTableGauge(String name, Gauge gauge, Gauge globalGauge)
{
return createTableGauge(name, name, gauge, globalGauge);
}
protected Gauge createTableGauge(String name, String alias, Gauge gauge, Gauge globalGauge)
{
Gauge cfGauge = Metrics.register(factory.createMetricName(name), aliasFactory.createMetricName(alias), gauge);
if (register(name, alias, cfGauge) && globalGauge != null)
{
Metrics.register(GLOBAL_FACTORY.createMetricName(name), GLOBAL_ALIAS_FACTORY.createMetricName(alias), globalGauge);
}
return cfGauge;
}
/**
* Same as {@link #createTableGauge(String, Gauge, Gauge)} but accepts a deprecated
* name for a table {@code Gauge}. Prefer that method when deprecation is not necessary.
*
* @param name the name of the metric registered with the "Table" type
* @param deprecated the deprecated name for the metric registered with the "Table" type
*/
protected Gauge createTableGaugeWithDeprecation(String name, String deprecated, Gauge gauge, Gauge globalGauge)
{
assert deprecated != null : "no deprecated metric name provided";
assert globalGauge != null : "no global Gauge metric provided";
Gauge cfGauge = Metrics.register(factory.createMetricName(name),
gauge,
aliasFactory.createMetricName(name),
factory.createMetricName(deprecated),
aliasFactory.createMetricName(deprecated));
if (register(name, name, deprecated, cfGauge))
{
Metrics.register(GLOBAL_FACTORY.createMetricName(name),
globalGauge,
GLOBAL_ALIAS_FACTORY.createMetricName(name),
GLOBAL_FACTORY.createMetricName(deprecated),
GLOBAL_ALIAS_FACTORY.createMetricName(deprecated));
}
return cfGauge;
}
/**
* Creates a counter that will also have a global counter thats the sum of all counters across
* different column families
*/
protected Counter createTableCounter(final String name)
{
return createTableCounter(name, name);
}
protected Counter createTableCounter(final String name, final String alias)
{
Counter cfCounter = Metrics.counter(factory.createMetricName(name), aliasFactory.createMetricName(alias));
if (register(name, alias, cfCounter))
{
Metrics.register(GLOBAL_FACTORY.createMetricName(name),
GLOBAL_ALIAS_FACTORY.createMetricName(alias),
new Gauge()
{
public Long getValue()
{
long total = 0;
for (Metric cfGauge : ALL_TABLE_METRICS.get(name))
{
total += ((Counter) cfGauge).getCount();
}
return total;
}
});
}
return cfCounter;
}
private Meter createTableMeter(final String name)
{
return createTableMeter(name, name);
}
private Meter createTableMeter(final String name, final String alias)
{
Meter tableMeter = Metrics.meter(factory.createMetricName(name), aliasFactory.createMetricName(alias));
register(name, alias, tableMeter);
return tableMeter;
}
private Histogram createHistogram(String name, boolean considerZeroes)
{
Histogram histogram = Metrics.histogram(factory.createMetricName(name), aliasFactory.createMetricName(name), considerZeroes);
register(name, name, histogram);
return histogram;
}
/**
* Computes the compression ratio for the specified SSTables
*
* @param sstables the SSTables
* @return the compression ratio for the specified SSTables
*/
private static Double computeCompressionRatio(Iterable sstables)
{
double compressedLengthSum = 0;
double dataLengthSum = 0;
for (SSTableReader sstable : sstables)
{
if (sstable.compression)
{
// We should not have any sstable which are in an open early mode as the sstable were selected
// using SSTableSet.CANONICAL.
assert sstable.openReason != SSTableReader.OpenReason.EARLY;
CompressionMetadata compressionMetadata = sstable.getCompressionMetadata();
compressedLengthSum += compressionMetadata.compressedFileLength;
dataLengthSum += compressionMetadata.dataLength;
}
}
return dataLengthSum != 0 ? compressedLengthSum / dataLengthSum : MetadataCollector.NO_COMPRESSION_RATIO;
}
/**
* Create a histogram-like interface that will register both a CF, keyspace and global level
* histogram and forward any updates to both
*/
protected TableHistogram createTableHistogram(String name, Histogram keyspaceHistogram, boolean considerZeroes)
{
return createTableHistogram(name, name, keyspaceHistogram, considerZeroes);
}
protected TableHistogram createTableHistogram(String name, String alias, Histogram keyspaceHistogram, boolean considerZeroes)
{
Histogram cfHistogram = Metrics.histogram(factory.createMetricName(name), aliasFactory.createMetricName(alias), considerZeroes);
register(name, alias, cfHistogram);
return new TableHistogram(cfHistogram,
keyspaceHistogram,
Metrics.histogram(GLOBAL_FACTORY.createMetricName(name),
GLOBAL_ALIAS_FACTORY.createMetricName(alias),
considerZeroes));
}
protected Histogram createTableHistogram(String name, boolean considerZeroes)
{
return createTableHistogram(name, name, considerZeroes);
}
protected Histogram createTableHistogram(String name, String alias, boolean considerZeroes)
{
Histogram tableHistogram = Metrics.histogram(factory.createMetricName(name), aliasFactory.createMetricName(alias), considerZeroes);
register(name, alias, tableHistogram);
return tableHistogram;
}
protected TableTimer createTableTimer(String name, Timer keyspaceTimer)
{
Timer cfTimer = Metrics.timer(factory.createMetricName(name), aliasFactory.createMetricName(name));
register(name, name, keyspaceTimer);
Timer global = Metrics.timer(GLOBAL_FACTORY.createMetricName(name), GLOBAL_ALIAS_FACTORY.createMetricName(name));
return new TableTimer(cfTimer, keyspaceTimer, global);
}
protected SnapshottingTimer createTableTimer(String name)
{
SnapshottingTimer tableTimer = Metrics.timer(factory.createMetricName(name), aliasFactory.createMetricName(name));
register(name, name, tableTimer);
return tableTimer;
}
protected TableMeter createTableMeter(String name, Meter keyspaceMeter)
{
return createTableMeter(name, name, keyspaceMeter);
}
protected TableMeter createTableMeter(String name, String alias, Meter keyspaceMeter)
{
Meter meter = Metrics.meter(factory.createMetricName(name), aliasFactory.createMetricName(alias));
register(name, alias, meter);
return new TableMeter(meter,
keyspaceMeter,
Metrics.meter(GLOBAL_FACTORY.createMetricName(name),
GLOBAL_ALIAS_FACTORY.createMetricName(alias)));
}
private LatencyMetrics createLatencyMetrics(String namePrefix, LatencyMetrics ... parents)
{
LatencyMetrics metric = new LatencyMetrics(factory, namePrefix, parents);
all.add(metric::release);
return metric;
}
/**
* Registers a metric to be removed when unloading CF.
* @return true if first time metric with that name has been registered
*/
private boolean register(String name, String alias, Metric metric)
{
return register(name, alias, null, metric);
}
/**
* Registers a metric to be removed when unloading CF.
*
* @param name the name of the metric registered with the "Table" type
* @param alias the name of the metric registered with the legacy "ColumnFamily" type
* @param deprecated an optionally null deprecated name for the metric registered with the "Table"
*
* @return true if first time metric with that name has been registered
*/
private boolean register(String name, String alias, String deprecated, Metric metric)
{
boolean ret = ALL_TABLE_METRICS.putIfAbsent(name, ConcurrentHashMap.newKeySet()) == null;
ALL_TABLE_METRICS.get(name).add(metric);
all.add(() -> releaseMetric(name, alias, deprecated));
return ret;
}
private void releaseMetric(String tableMetricName, String cfMetricName, String tableMetricAlias)
{
CassandraMetricsRegistry.MetricName name = factory.createMetricName(tableMetricName);
final Metric metric = Metrics.getMetrics().get(name.getMetricName());
if (metric != null)
{
// Metric will be null if we are releasing a view metric. Views have null for ViewLockAcquireTime and ViewLockReadTime
ALL_TABLE_METRICS.get(tableMetricName).remove(metric);
CassandraMetricsRegistry.MetricName cfAlias = aliasFactory.createMetricName(cfMetricName);
if (tableMetricAlias != null)
{
Metrics.remove(name, cfAlias, factory.createMetricName(tableMetricAlias), aliasFactory.createMetricName(tableMetricAlias));
}
else
{
Metrics.remove(name, cfAlias);
}
}
}
public static class TableMeter
{
public final Meter[] all;
public final Meter table;
public final Meter global;
private TableMeter(Meter table, Meter keyspace, Meter global)
{
this.table = table;
this.global = global;
this.all = new Meter[]{table, keyspace, global};
}
public void mark()
{
for (Meter meter : all)
{
meter.mark();
}
}
}
public static class TableHistogram
{
public final Histogram[] all;
public final Histogram cf;
public final Histogram global;
private TableHistogram(Histogram cf, Histogram keyspace, Histogram global)
{
this.cf = cf;
this.global = global;
this.all = new Histogram[]{cf, keyspace, global};
}
public void update(long i)
{
for(Histogram histo : all)
{
histo.update(i);
}
}
}
public static class TableTimer
{
public final Timer[] all;
public final Timer cf;
public final Timer global;
private TableTimer(Timer cf, Timer keyspace, Timer global)
{
this.cf = cf;
this.global = global;
this.all = new Timer[]{cf, keyspace, global};
}
public void update(long i, TimeUnit unit)
{
for(Timer timer : all)
{
timer.update(i, unit);
}
}
public Context time()
{
return new Context(all);
}
public static class Context implements AutoCloseable
{
private final long start;
private final Timer [] all;
private Context(Timer [] all)
{
this.all = all;
start = nanoTime();
}
public void close()
{
long duration = nanoTime() - start;
for (Timer t : all)
t.update(duration, TimeUnit.NANOSECONDS);
}
}
}
static class TableMetricNameFactory implements MetricNameFactory
{
private final String keyspaceName;
private final String tableName;
private final boolean isIndex;
private final String type;
TableMetricNameFactory(ColumnFamilyStore cfs, String type)
{
this.keyspaceName = cfs.getKeyspaceName();
this.tableName = cfs.name;
this.isIndex = cfs.isIndex();
this.type = type;
}
public CassandraMetricsRegistry.MetricName createMetricName(String metricName)
{
String groupName = TableMetrics.class.getPackage().getName();
String type = isIndex ? "Index" + this.type : this.type;
StringBuilder mbeanName = new StringBuilder();
mbeanName.append(groupName).append(":");
mbeanName.append("type=").append(type);
mbeanName.append(",keyspace=").append(keyspaceName);
mbeanName.append(",scope=").append(tableName);
mbeanName.append(",name=").append(metricName);
return new CassandraMetricsRegistry.MetricName(groupName, type, metricName, keyspaceName + "." + tableName, mbeanName.toString());
}
}
static class AllTableMetricNameFactory implements MetricNameFactory
{
private final String type;
public AllTableMetricNameFactory(String type)
{
this.type = type;
}
public CassandraMetricsRegistry.MetricName createMetricName(String metricName)
{
String groupName = TableMetrics.class.getPackage().getName();
StringBuilder mbeanName = new StringBuilder();
mbeanName.append(groupName).append(":");
mbeanName.append("type=").append(type);
mbeanName.append(",name=").append(metricName);
return new CassandraMetricsRegistry.MetricName(groupName, type, metricName, "all", mbeanName.toString());
}
}
@FunctionalInterface
public interface ReleasableMetric
{
void release();
}
private static class GlobalTableGauge implements Gauge
{
private final String name;
public GlobalTableGauge(String name)
{
this.name = name;
}
public Long getValue()
{
long total = 0;
for (Metric cfGauge : ALL_TABLE_METRICS.get(name))
{
total = total + ((Gauge) cfGauge).getValue().longValue();
}
return total;
}
}
}