com.sleepycat.je.rep
Class ReplicatedEnvironmentStats

java.lang.Object
  com.sleepycat.je.rep.ReplicatedEnvironmentStats

All Implemented Interfaces:

Serializable

public class ReplicatedEnvironmentStats
extends Object
implements Serializable

Statistics for a replicated environment.

The statistics are logically grouped into four categories. Viewing the statistics through toString() displays the values in these categories, as does viewing the stats through the RepJEMonitor mbean. Viewing the stats with toStringVerbose() will provide more detailed descriptions of the stats and stat categories.

The current categories are:

• FeederManager: A feed is the replication stream between a master and replica. The current number of feeders gives a sense of the connectivity of the replication group.
• BinaryProtocol: These statistics center on the network traffic engendered by the replication stream, and provide a sense of the network bandwidth seen by the replication group.
• Replay: The act of receiving and applying the replication stream at the Replica node is called Replay. These stats give a sense of how much load the replica node is experiencing when processing the traffic from the replication group.
• ConsistencyTracker: The tracker is invoked when consistency policies are used at a replica node. This provides a measure of delays experienced by read requests at a replica, in order to conform with the consistency specified by the application.

See Also:

Viewing Statistics with JConsole, Serialized Form

Method Summary

int	getNFeedersCreated() The number of Feeder threads since this node was started.
int	getNFeedersShutdown() The number of Feeder threads that were shut down, either because this node, or the Replica terminated the connection.
long	getNProtocolBytesRead() The number of bytes of Replication Stream read over the network.
long	getNProtocolBytesWritten() The number of Replication Stream bytes written over the network.
long	getNProtocolMessagesRead() The number of Replication Stream messages read over the network.
long	getNProtocolMessagesWritten() The number of Replication Stream messages written over the network.
long	getNReplayAborts() The number of abort records which were replayed while the node was in the Replica state.
long	getNReplayCommitAcks() The number of commit log records that needed to be acknowledged to the Master by this node when it was a Replica.
long	getNReplayCommitNoSyncs() The number of commitNoSync() calls executed when satisfying transaction commit acknowledgment requests from the Master.
long	getNReplayCommits() The number of commit log records that were replayed by this node when it was a Replica.
long	getNReplayCommitSyncs() The number of commitSync() calls executed when satisfying transaction commit acknowledgment requests from the Master.
long	getNReplayCommitWriteNoSyncs() The number of commitNoSync() calls executed when satisfying transaction commit acknowledgment requests from the Master.
long	getNReplayLNs() The number of data records (creation, update, deletion) which were replayed while the node was in the Replica state.
long	getNReplayNameLNs() The number of NameLN records which were replayed while the node was in the Replica state.
long	getProtocolBytesReadRate() Bytes read throughput, in terms of bytes received from the replication network channels per second.
long	getProtocolBytesWriteRate() Bytes written throughput, in terms of bytes written to the replication network channels per second.
long	getProtocolMessageReadRate() Incoming replication message throughput, in terms of messages received from the replication network channels per second.
long	getProtocolMessageWriteRate() Outgoing message throughput, in terms of message written to the replication network channels per second.
long	getProtocolReadNanos() The number of nanoseconds spent reading from the network channel.
long	getProtocolWriteNanos() The number of nanoseconds spent writing to the network channel.
long	getReplayElapsedTxnTime() The total elapsed time in milliseconds spent replaying committed and aborted transactions.
long	getReplayMaxCommitProcessingNanos() The maximum time taken to replay a transaction commit operation.
long	getReplayMinCommitProcessingNanos() The minimum time taken to replay a transaction commit operation.
long	getReplayTotalCommitProcessingNanos() The total time spent to replay all commit operations.
Map<String,String>	getTips()
long	getTrackerLagConsistencyWaitMs() The total time (in msec) for which a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the TimeConsistencyPolicy.
long	getTrackerLagConsistencyWaits() The number of times a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the TimeConsistencyPolicy.
long	getTrackerVLSNConsistencyWaitMs() The total time (in msec) for which a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the CommitPointConsistencyPolicy.
long	getTrackerVLSNConsistencyWaits() The number of times a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the CommitPointConsistencyPolicy.
String	toString() Returns a string representation of the statistics.
String	toStringVerbose()

Methods inherited from class java.lang.Object

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

Method Detail

getNFeedersCreated

public int getNFeedersCreated()

The number of Feeder threads since this node was started. A Master supplies the Replication Stream to a Replica via a Feeder thread. The Feeder thread is created when a Replica connects to the node and is shutdown when the connection is terminated.

getNFeedersShutdown

public int getNFeedersShutdown()

The number of Feeder threads that were shut down, either because this node, or the Replica terminated the connection.

See Also:

getNFeedersCreated()

getNReplayCommits

public long getNReplayCommits()

The number of commit log records that were replayed by this node when it was a Replica. There is one commit record record for each actual commit on the Master.

getNReplayCommitAcks

public long getNReplayCommitAcks()

The number of commit log records that needed to be acknowledged to the Master by this node when it was a Replica. The rate of change of this statistic, will show a strong correlation with that of NReplayCommits statistic, if the Durability policy used by transactions on the master calls for transaction commit acknowledgments and the Replica is current with respect to the Master.

getNReplayCommitSyncs

public long getNReplayCommitSyncs()

The number of commitSync() calls executed when satisfying transaction commit acknowledgment requests from the Master.

getNReplayCommitNoSyncs

public long getNReplayCommitNoSyncs()

The number of commitNoSync() calls executed when satisfying transaction commit acknowledgment requests from the Master.

getNReplayCommitWriteNoSyncs

public long getNReplayCommitWriteNoSyncs()

The number of commitNoSync() calls executed when satisfying transaction commit acknowledgment requests from the Master.

getNReplayAborts

public long getNReplayAborts()

The number of abort records which were replayed while the node was in the Replica state.

getNReplayNameLNs

public long getNReplayNameLNs()

The number of NameLN records which were replayed while the node was in the Replica state.

getNReplayLNs

public long getNReplayLNs()

The number of data records (creation, update, deletion) which were replayed while the node was in the Replica state.

getReplayElapsedTxnTime

public long getReplayElapsedTxnTime()

The total elapsed time in milliseconds spent replaying committed and aborted transactions.

getReplayMinCommitProcessingNanos

public long getReplayMinCommitProcessingNanos()

The minimum time taken to replay a transaction commit operation.

getReplayMaxCommitProcessingNanos

public long getReplayMaxCommitProcessingNanos()

The maximum time taken to replay a transaction commit operation.

getReplayTotalCommitProcessingNanos

public long getReplayTotalCommitProcessingNanos()

The total time spent to replay all commit operations.

getNProtocolBytesRead

public long getNProtocolBytesRead()

The number of bytes of Replication Stream read over the network. It does not include the TCP/IP overhead.

If the node has served as both a Replica and Master since it was first started, the number represents the sum total of all Feeder related network activity, as well as Replica network activity.

getNProtocolMessagesRead

public long getNProtocolMessagesRead()

The number of Replication Stream messages read over the network.

If the node has served as both a Replica and Master since it was first started, the number represents the sum total of all Feeder related network activity, as well as Replica network activity.

getNProtocolBytesWritten

public long getNProtocolBytesWritten()

The number of Replication Stream bytes written over the network.

If the node has served as both a Replica and Master since it was first started, the number represents the sum total of all Feeder related network activity, as well as Replica network activity.

getNProtocolMessagesWritten

public long getNProtocolMessagesWritten()

The number of Replication Stream messages written over the network.

If the node has served as both a Replica and Master since it was first started, the number represents the sum total of all Feeder related network activity, as well as Replica network activity.

getProtocolReadNanos

public long getProtocolReadNanos()

The number of nanoseconds spent reading from the network channel.

If the node has served as both a Replica and Master since it was first started, the number represents the sum total of all Feeder related network activity, as well as Replica network activity.

getProtocolWriteNanos

public long getProtocolWriteNanos()

The number of nanoseconds spent writing to the network channel.

If the node has served as both a Replica and Master since it was first started, the number represents the sum total of all Feeder related network activity, as well as Replica network activity.

getProtocolMessageReadRate

public long getProtocolMessageReadRate()

Incoming replication message throughput, in terms of messages received from the replication network channels per second.

If the node has served as both a Replica and Master since it was first started, the number represents the message reading rate over all Feeder related network activity, as well as Replica network activity.

getProtocolMessageWriteRate

public long getProtocolMessageWriteRate()

Outgoing message throughput, in terms of message written to the replication network channels per second.

If the node has served as both a Replica and Master since it was first started, the number represents the message writing rate over all Feeder related network activity, as well as Replica network activity.

getProtocolBytesReadRate

public long getProtocolBytesReadRate()

Bytes read throughput, in terms of bytes received from the replication network channels per second.

If the node has served as both a Replica and Master since it was first started, the number represents the bytes reading rate over all Feeder related network activity, as well as Replica network activity.

getProtocolBytesWriteRate

public long getProtocolBytesWriteRate()

Bytes written throughput, in terms of bytes written to the replication network channels per second.

If the node has served as both a Replica and Master since it was first started, the number represents the bytes writing rate over all Feeder related network activity, as well as Replica network activity.

getTrackerLagConsistencyWaits

public long getTrackerLagConsistencyWaits()

The number of times a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the TimeConsistencyPolicy.

getTrackerLagConsistencyWaitMs

public long getTrackerLagConsistencyWaitMs()

The total time (in msec) for which a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the TimeConsistencyPolicy.

getTrackerVLSNConsistencyWaits

public long getTrackerVLSNConsistencyWaits()

The number of times a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the CommitPointConsistencyPolicy.

getTrackerVLSNConsistencyWaitMs

public long getTrackerVLSNConsistencyWaitMs()

The total time (in msec) for which a Replica held back a Environment.beginTransaction(Transaction,TransactionConfig) operation to satisfy the CommitPointConsistencyPolicy.

toString

public String toString()

Returns a string representation of the statistics.

Overrides:

toString in class Object

toStringVerbose

public String toStringVerbose()

getTips

public Map<String,String> getTips()