Uses of Class
org.apache.cassandra.metrics.Sampler

Packages that use Sampler

Package	Description
org.apache.cassandra.metrics

Uses of Sampler in org.apache.cassandra.metrics

Subclasses of Sampler in org.apache.cassandra.metrics

Modifier and Type	Class	Description
class	FrequencySampler<T>	Find the most frequent sample.
class	MaxSampler<T>	Note: samplerExecutor is single threaded but we still need to synchronize as we have access from both internal and the external JMX context that can cause races.

Fields in org.apache.cassandra.metrics declared as Sampler

Modifier and Type	Field	Description
final Sampler<ByteBuffer>	TableMetrics.topCasPartitionContention	When sampler activated, will track the most frequent partitions with cas contention
final Sampler<String>	TableMetrics.topLocalReadQueryTime	When sampler activated, will track the slowest local reads
final Sampler<ByteBuffer>	TableMetrics.topReadPartitionFrequency	When sampler activated, will track the most frequently read partitions
final Sampler<ByteBuffer>	TableMetrics.topReadPartitionRowCount	When sampler activated, will track partitions read with the most rows
final Sampler<ByteBuffer>	TableMetrics.topReadPartitionSSTableCount	When sample activated, will track partitions read with the most merged sstables
final Sampler<ByteBuffer>	TableMetrics.topReadPartitionTombstoneCount	When sampler activated, will track partitions read with the most tombstones
final Sampler<ByteBuffer>	TableMetrics.topWritePartitionFrequency	When sampler activated, will track the most frequently written to partitions
final Sampler<ByteBuffer>	TableMetrics.topWritePartitionSize	When sampler activated, will track the largest mutations

Fields in org.apache.cassandra.metrics with type parameters of type Sampler

Modifier and Type	Field	Description
final EnumMap<Sampler.SamplerType,Sampler<?>>	TableMetrics.samplers