org.apache.cassandra.metrics

Class KeyspaceMetrics

java.lang.Object

org.apache.cassandra.metrics.KeyspaceMetrics

public class KeyspaceMetrics
extends java.lang.Object

Metrics for ColumnFamilyStore.

Field Summary

Fields

Modifier and Type	Field and Description
com.codahale.metrics.Counter	additionalWrites Needed to write to a transient replica to satisfy quorum
com.codahale.metrics.Gauge<java.lang.Long>	allMemtablesLiveDataSize Total amount of live data stored in the memtables (2i and pending flush memtables included) that resides off-heap, excluding any data structure overhead
com.codahale.metrics.Gauge<java.lang.Long>	allMemtablesOffHeapDataSize Total amount of data stored in the memtables (2i and pending flush memtables included) that resides off-heap.
com.codahale.metrics.Gauge<java.lang.Long>	allMemtablesOnHeapDataSize Total amount of data stored in the memtables (2i and pending flush memtables included) that resides on-heap.
com.codahale.metrics.Timer	anticompactionTime Time spent anticompacting
com.codahale.metrics.Gauge<java.lang.Long>	bloomFilterDiskSpaceUsed Disk space used by bloom filter
com.codahale.metrics.Gauge<java.lang.Long>	bloomFilterOffHeapMemoryUsed Off heap memory used by bloom filter
com.codahale.metrics.Histogram	bytesValidated histogram over the number of bytes we have validated
LatencyMetrics	casCommit CAS Commit metrics
LatencyMetrics	casPrepare CAS Prepare metric
LatencyMetrics	casPropose CAS Propose metrics
com.codahale.metrics.Meter	clientTombstoneAborts
com.codahale.metrics.Meter	clientTombstoneWarnings
com.codahale.metrics.Histogram	colUpdateTimeDeltaHistogram Column update time delta on this Keyspace
com.codahale.metrics.Gauge<java.lang.Long>	compressionMetadataOffHeapMemoryUsed Off heap memory used by compression meta data
com.codahale.metrics.Meter	confirmedRepairedInconsistencies 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.
com.codahale.metrics.Histogram	coordinatorReadSize
com.codahale.metrics.Meter	coordinatorReadSizeAborts
com.codahale.metrics.Meter	coordinatorReadSizeWarnings
MetricNameFactory	factory
LatencyMetrics	idealCLWriteLatency Ideal CL write latency metrics
com.codahale.metrics.Gauge<java.lang.Long>	indexSummaryOffHeapMemoryUsed Off heap memory used by index summary
com.codahale.metrics.Gauge<java.lang.Long>	liveDiskSpaceUsed Disk space used by SSTables belonging to this CF
com.codahale.metrics.Histogram	liveScannedHistogram Live cells scanned in queries on this Keyspace
com.codahale.metrics.Histogram	localReadSize
com.codahale.metrics.Meter	localReadSizeAborts
com.codahale.metrics.Meter	localReadSizeWarnings
com.codahale.metrics.Gauge<java.lang.Long>	memtableColumnsCount Total number of columns present in the memtable.
com.codahale.metrics.Gauge<java.lang.Long>	memtableLiveDataSize Total amount of live data stored in the memtable, excluding any data structure overhead
com.codahale.metrics.Gauge<java.lang.Long>	memtableOffHeapDataSize Total amount of data stored in the memtable that resides off-heap, including column related overhead and partitions overwritten.
com.codahale.metrics.Gauge<java.lang.Long>	memtableOnHeapDataSize Total amount of data stored in the memtable that resides on-heap, including column related overhead and partitions overwritten.
com.codahale.metrics.Gauge<java.lang.Long>	memtableSwitchCount Number of times flush has resulted in the memtable being switched out.
com.codahale.metrics.Histogram	partitionsValidated histogram over the number of partitions we have validated
com.codahale.metrics.Gauge<java.lang.Long>	pendingCompactions Estimate of number of pending compactios for this CF
com.codahale.metrics.Gauge<java.lang.Long>	pendingFlushes Estimated number of tasks pending for this column family
LatencyMetrics	rangeLatency (Local) range slice metrics
LatencyMetrics	readLatency (Local) read metrics
com.codahale.metrics.Histogram	repairedDataTrackingOverreadRows Tracks the amount overreading of repaired data replicas perform in order to produce digests at query time.
com.codahale.metrics.Timer	repairedDataTrackingOverreadTime
com.codahale.metrics.Timer	repairPrepareTime total time spent preparing for repair
com.codahale.metrics.Counter	repairsCompleted Number of completed repairs as coordinator on this keyspace
com.codahale.metrics.Counter	repairsStarted Number of started repairs as coordinator on this keyspace
com.codahale.metrics.Timer	repairSyncTime total time spent syncing data after repair
com.codahale.metrics.Timer	repairTime total time spent as a repair coordinator
com.codahale.metrics.Histogram	rowIndexSize
com.codahale.metrics.Meter	rowIndexSizeAborts
com.codahale.metrics.Meter	rowIndexSizeWarnings
com.codahale.metrics.Counter	speculativeFailedRetries Speculative retry occured but still timed out
com.codahale.metrics.Counter	speculativeInsufficientReplicas Needed to speculate, but didn't have enough replicas
com.codahale.metrics.Counter	speculativeRetries Speculative retries
com.codahale.metrics.Histogram	sstablesPerReadHistogram Histogram of the number of sstable data files accessed per read
com.codahale.metrics.Histogram	tombstoneScannedHistogram Tombstones scanned in queries on this Keyspace
com.codahale.metrics.Gauge<java.lang.Long>	totalDiskSpaceUsed Total disk space used by SSTables belonging to this CF, including obsolete ones waiting to be GC'd
com.codahale.metrics.Meter	unconfirmedRepairedInconsistencies Incremented where an inconsistency is detected, but there are pending & uncommitted repair sessions in play on at least one replica.
com.codahale.metrics.Timer	validationTime total time spent creating merkle trees
com.codahale.metrics.Timer	viewLockAcquireTime time taken acquiring the partition lock for materialized view updates on this keyspace
com.codahale.metrics.Timer	viewReadTime time taken during the local read of a materialized view update
com.codahale.metrics.Counter	writeFailedIdealCL Writes failed ideal consistency
LatencyMetrics	writeLatency (Local) write metrics

Constructor Summary

Constructors

Constructor and Description
KeyspaceMetrics(Keyspace ks) Creates metrics for given ColumnFamilyStore.

Method Summary

Modifier and Type	Method and Description
protected com.codahale.metrics.Counter	createKeyspaceCounter(java.lang.String name)
protected com.codahale.metrics.Histogram	createKeyspaceHistogram(java.lang.String name, boolean considerZeroes)
protected com.codahale.metrics.Meter	createKeyspaceMeter(java.lang.String name)
protected com.codahale.metrics.Timer	createKeyspaceTimer(java.lang.String name)
void	release() Release all associated metrics.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

memtableLiveDataSize

public final com.codahale.metrics.Gauge<java.lang.Long> memtableLiveDataSize

Total amount of live data stored in the memtable, excluding any data structure overhead

memtableOnHeapDataSize

public final com.codahale.metrics.Gauge<java.lang.Long> memtableOnHeapDataSize

Total amount of data stored in the memtable that resides on-heap, including column related overhead and partitions overwritten.

memtableOffHeapDataSize

public final com.codahale.metrics.Gauge<java.lang.Long> memtableOffHeapDataSize

Total amount of data stored in the memtable that resides off-heap, including column related overhead and partitions overwritten.

allMemtablesLiveDataSize

public final com.codahale.metrics.Gauge<java.lang.Long> allMemtablesLiveDataSize

Total amount of live data stored in the memtables (2i and pending flush memtables included) that resides off-heap, excluding any data structure overhead

allMemtablesOnHeapDataSize

public final com.codahale.metrics.Gauge<java.lang.Long> allMemtablesOnHeapDataSize

Total amount of data stored in the memtables (2i and pending flush memtables included) that resides on-heap.

allMemtablesOffHeapDataSize

public final com.codahale.metrics.Gauge<java.lang.Long> allMemtablesOffHeapDataSize

Total amount of data stored in the memtables (2i and pending flush memtables included) that resides off-heap.

memtableColumnsCount

public final com.codahale.metrics.Gauge<java.lang.Long> memtableColumnsCount

Total number of columns present in the memtable.

memtableSwitchCount

public final com.codahale.metrics.Gauge<java.lang.Long> memtableSwitchCount

Number of times flush has resulted in the memtable being switched out.

pendingFlushes

public final com.codahale.metrics.Gauge<java.lang.Long> pendingFlushes

Estimated number of tasks pending for this column family

pendingCompactions

public final com.codahale.metrics.Gauge<java.lang.Long> pendingCompactions

Estimate of number of pending compactios for this CF

liveDiskSpaceUsed

public final com.codahale.metrics.Gauge<java.lang.Long> liveDiskSpaceUsed

Disk space used by SSTables belonging to this CF

totalDiskSpaceUsed

public final com.codahale.metrics.Gauge<java.lang.Long> totalDiskSpaceUsed

Total disk space used by SSTables belonging to this CF, including obsolete ones waiting to be GC'd

bloomFilterDiskSpaceUsed

public final com.codahale.metrics.Gauge<java.lang.Long> bloomFilterDiskSpaceUsed

Disk space used by bloom filter

bloomFilterOffHeapMemoryUsed

public final com.codahale.metrics.Gauge<java.lang.Long> bloomFilterOffHeapMemoryUsed

Off heap memory used by bloom filter

indexSummaryOffHeapMemoryUsed

public final com.codahale.metrics.Gauge<java.lang.Long> indexSummaryOffHeapMemoryUsed

Off heap memory used by index summary

compressionMetadataOffHeapMemoryUsed

public final com.codahale.metrics.Gauge<java.lang.Long> compressionMetadataOffHeapMemoryUsed

Off heap memory used by compression meta data

readLatency

public final LatencyMetrics readLatency

(Local) read metrics

rangeLatency

public final LatencyMetrics rangeLatency

(Local) range slice metrics

writeLatency

public final LatencyMetrics writeLatency

(Local) write metrics

sstablesPerReadHistogram

public final com.codahale.metrics.Histogram sstablesPerReadHistogram

Histogram of the number of sstable data files accessed per read

tombstoneScannedHistogram

public final com.codahale.metrics.Histogram tombstoneScannedHistogram

Tombstones scanned in queries on this Keyspace

liveScannedHistogram

public final com.codahale.metrics.Histogram liveScannedHistogram

Live cells scanned in queries on this Keyspace

colUpdateTimeDeltaHistogram

public final com.codahale.metrics.Histogram colUpdateTimeDeltaHistogram

Column update time delta on this Keyspace

viewLockAcquireTime

public final com.codahale.metrics.Timer viewLockAcquireTime

time taken acquiring the partition lock for materialized view updates on this keyspace

viewReadTime

public final com.codahale.metrics.Timer viewReadTime

time taken during the local read of a materialized view update

casPrepare

public final LatencyMetrics casPrepare

CAS Prepare metric

casPropose

public final LatencyMetrics casPropose

CAS Propose metrics

casCommit

public final LatencyMetrics casCommit

CAS Commit metrics

writeFailedIdealCL

public final com.codahale.metrics.Counter writeFailedIdealCL

Writes failed ideal consistency

idealCLWriteLatency

public final LatencyMetrics idealCLWriteLatency

Ideal CL write latency metrics

speculativeRetries

public final com.codahale.metrics.Counter speculativeRetries

Speculative retries

speculativeFailedRetries

public final com.codahale.metrics.Counter speculativeFailedRetries

Speculative retry occured but still timed out

speculativeInsufficientReplicas

public final com.codahale.metrics.Counter speculativeInsufficientReplicas

Needed to speculate, but didn't have enough replicas

additionalWrites

public final com.codahale.metrics.Counter additionalWrites

Needed to write to a transient replica to satisfy quorum

repairsStarted

public final com.codahale.metrics.Counter repairsStarted

Number of started repairs as coordinator on this keyspace

repairsCompleted

public final com.codahale.metrics.Counter repairsCompleted

Number of completed repairs as coordinator on this keyspace

repairTime

public final com.codahale.metrics.Timer repairTime

total time spent as a repair coordinator

repairPrepareTime

public final com.codahale.metrics.Timer repairPrepareTime

total time spent preparing for repair

anticompactionTime

public final com.codahale.metrics.Timer anticompactionTime

Time spent anticompacting

validationTime

public final com.codahale.metrics.Timer validationTime

total time spent creating merkle trees

repairSyncTime

public final com.codahale.metrics.Timer repairSyncTime

total time spent syncing data after repair

bytesValidated

public final com.codahale.metrics.Histogram bytesValidated

histogram over the number of bytes we have validated

partitionsValidated

public final com.codahale.metrics.Histogram partitionsValidated

histogram over the number of partitions we have validated

confirmedRepairedInconsistencies

public final com.codahale.metrics.Meter confirmedRepairedInconsistencies

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.

unconfirmedRepairedInconsistencies

public final com.codahale.metrics.Meter unconfirmedRepairedInconsistencies

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.

repairedDataTrackingOverreadRows

public final com.codahale.metrics.Histogram repairedDataTrackingOverreadRows

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.

repairedDataTrackingOverreadTime

public final com.codahale.metrics.Timer repairedDataTrackingOverreadTime

clientTombstoneWarnings

public final com.codahale.metrics.Meter clientTombstoneWarnings

clientTombstoneAborts

public final com.codahale.metrics.Meter clientTombstoneAborts

coordinatorReadSizeWarnings

public final com.codahale.metrics.Meter coordinatorReadSizeWarnings

coordinatorReadSizeAborts

public final com.codahale.metrics.Meter coordinatorReadSizeAborts

coordinatorReadSize

public final com.codahale.metrics.Histogram coordinatorReadSize

localReadSizeWarnings

public final com.codahale.metrics.Meter localReadSizeWarnings

localReadSizeAborts

public final com.codahale.metrics.Meter localReadSizeAborts

localReadSize

public final com.codahale.metrics.Histogram localReadSize

rowIndexSizeWarnings

public final com.codahale.metrics.Meter rowIndexSizeWarnings

rowIndexSizeAborts

public final com.codahale.metrics.Meter rowIndexSizeAborts

rowIndexSize

public final com.codahale.metrics.Histogram rowIndexSize

factory

public final MetricNameFactory factory

Constructor Detail

KeyspaceMetrics

public KeyspaceMetrics(Keyspace ks)

Creates metrics for given ColumnFamilyStore.

Parameters:

ks - Keyspace to measure metrics

Method Detail

release

public void release()

Release all associated metrics.

createKeyspaceCounter

protected com.codahale.metrics.Counter createKeyspaceCounter(java.lang.String name)

createKeyspaceHistogram

protected com.codahale.metrics.Histogram createKeyspaceHistogram(java.lang.String name,
                                                                 boolean considerZeroes)

createKeyspaceTimer

protected com.codahale.metrics.Timer createKeyspaceTimer(java.lang.String name)

createKeyspaceMeter

protected com.codahale.metrics.Meter createKeyspaceMeter(java.lang.String name)