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.yammer.metrics.core.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.yammer.metrics.core.Gauge<java.lang.Long>	allMemtablesOffHeapDataSize Total amount of data stored in the memtables (2i and pending flush memtables included) that resides off-heap.
com.yammer.metrics.core.Gauge<java.lang.Long>	allMemtablesOnHeapDataSize Total amount of data stored in the memtables (2i and pending flush memtables included) that resides on-heap.
com.yammer.metrics.core.Gauge<java.lang.Long>	bloomFilterDiskSpaceUsed Disk space used by bloom filter
MetricNameFactory	factory
com.yammer.metrics.core.Gauge<java.lang.Long>	liveDiskSpaceUsed Disk space used by SSTables belonging to this CF
com.yammer.metrics.core.Histogram	liveScannedHistogram Live cells scanned in queries on this Keyspace
com.yammer.metrics.core.Gauge<java.lang.Long>	memtableColumnsCount Total number of columns present in the memtable.
com.yammer.metrics.core.Gauge<java.lang.Long>	memtableLiveDataSize Total amount of live data stored in the memtable, excluding any data structure overhead
com.yammer.metrics.core.Gauge<java.lang.Long>	memtableOffHeapDataSize Total amount of data stored in the memtable that resides off-heap, including column related overhead and overwritten rows.
com.yammer.metrics.core.Gauge<java.lang.Long>	memtableOnHeapDataSize Total amount of data stored in the memtable that resides on-heap, including column related overhead and overwritten rows.
com.yammer.metrics.core.Gauge<java.lang.Long>	memtableSwitchCount Number of times flush has resulted in the memtable being switched out.
com.yammer.metrics.core.Gauge<java.lang.Long>	pendingCompactions Estimate of number of pending compactios for this CF
com.yammer.metrics.core.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.yammer.metrics.core.Histogram	sstablesPerReadHistogram Histogram of the number of sstable data files accessed per read
com.yammer.metrics.core.Histogram	tombstoneScannedHistogram Tombstones scanned in queries on this Keyspace
com.yammer.metrics.core.Gauge<java.lang.Long>	totalDiskSpaceUsed Total disk space used by SSTables belonging to this CF, including obsolete ones waiting to be GC'd
LatencyMetrics	writeLatency (Local) write metrics

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
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.yammer.metrics.core.Gauge<java.lang.Long> memtableLiveDataSize

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

memtableOnHeapDataSize

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

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

memtableOffHeapDataSize

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

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

allMemtablesLiveDataSize

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

Total number of columns present in the memtable.

memtableSwitchCount

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

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

pendingFlushes

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

Estimated number of tasks pending for this column family

pendingCompactions

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

Estimate of number of pending compactios for this CF

liveDiskSpaceUsed

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

Disk space used by SSTables belonging to this CF

totalDiskSpaceUsed

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

Disk space used by bloom filter

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.yammer.metrics.core.Histogram sstablesPerReadHistogram

Histogram of the number of sstable data files accessed per read

tombstoneScannedHistogram

public final com.yammer.metrics.core.Histogram tombstoneScannedHistogram

Tombstones scanned in queries on this Keyspace

liveScannedHistogram

public final com.yammer.metrics.core.Histogram liveScannedHistogram

Live cells scanned in queries on this Keyspace

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.