Package com.sleepycat.db

Class TransactionStats

java.lang.Object

com.sleepycat.db.TransactionStats

public class TransactionStats
extends java.lang.Object

Transaction statistics for a database environment.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TransactionStats.Active

Method Summary

Modifier and Type	Method	Description
int	getInittxns()	The initial number of transactions configured.
LogSequenceNumber	getLastCkp()	The LSN of the last checkpoint.
int	getLastTxnId()	The last transaction ID allocated.
int	getMaxNactive()	The maximum number of active transactions at any one time.
int	getMaxNsnapshot()	The maximum number of transactions on the snapshot list at any one time.
int	getMaxTxns()	The maximum number of active transactions configured.
long	getNaborts()	The number of transactions that have aborted.
int	getNactive()	The number of transactions that are currently active.
long	getNumBegins()	The number of transactions that have begun.
long	getNumCommits()	The number of transactions that have committed.
int	getNumRestores()	The number of transactions that have been restored.
int	getNumSnapshot()	The number of transactions on the snapshot list.
long	getRegionNowait()	The number of times that a thread of control was able to obtain the transaction region mutex without waiting.
long	getRegionWait()	The number of times that a thread of control was forced to wait before obtaining the transaction region mutex.
long	getRegSize()	The size of the region.
long	getTimeCkp()	The time the last completed checkpoint finished (as the number of seconds since the Epoch, returned by the IEEE/ANSI Std 1003.1 (POSIX) time interface).
TransactionStats.Active[]	getTxnarray()	An array of Active objects, describing the currently active transactions.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

getNumRestores

public int getNumRestores()

The number of transactions that have been restored.

Returns:

the number of transactions that have been restored

getLastCkp

public LogSequenceNumber getLastCkp()

The LSN of the last checkpoint.

Returns:

the LSN of the last checkpoint

getTimeCkp

public long getTimeCkp()

The time the last completed checkpoint finished (as the number of seconds since the Epoch, returned by the IEEE/ANSI Std 1003.1 (POSIX) time interface).

Returns:

the time the last completed checkpoint finished

getLastTxnId

public int getLastTxnId()

The last transaction ID allocated.

Returns:

the last transaction ID allocated

getInittxns

public int getInittxns()

The initial number of transactions configured.

Returns:

the initial number of transactions configured

getMaxTxns

public int getMaxTxns()

The maximum number of active transactions configured.

Returns:

the maximum number of active transactions configured

getNaborts

public long getNaborts()

The number of transactions that have aborted.

Returns:

the number of transactions that have aborted

getNumBegins

public long getNumBegins()

The number of transactions that have begun.

Returns:

the number of transactions that have begun

getNumCommits

public long getNumCommits()

The number of transactions that have committed.

Returns:

the number of transactions that have committed

getNactive

public int getNactive()

The number of transactions that are currently active.

Returns:

the number of transactions that are currently active

getNumSnapshot

public int getNumSnapshot()

The number of transactions on the snapshot list. These are transactions which modified a database opened with DatabaseConfig.setMultiversion(boolean), and which have committed or aborted, but the copies of pages they created are still in the cache.

Returns:

the number of transactions on the snapshot list

getMaxNactive

public int getMaxNactive()

The maximum number of active transactions at any one time.

Returns:

the maximum number of active transactions at any one time

getMaxNsnapshot

public int getMaxNsnapshot()

The maximum number of transactions on the snapshot list at any one time.

Returns:

the maximum number of transactions on the snapshot list at any one time

getRegionWait

public long getRegionWait()

The number of times that a thread of control was forced to wait before obtaining the transaction region mutex.

Returns:

the number of times that a thread of control was forced to wait before obtaining the transaction region mutex

getRegionNowait

public long getRegionNowait()

The number of times that a thread of control was able to obtain the transaction region mutex without waiting.

Returns:

the number of times that a thread of control was able to obtain the transaction region mutex without waiting

getRegSize

public long getRegSize()

The size of the region.

Returns:

the size of the region

getTxnarray

public TransactionStats.Active[] getTxnarray()

An array of Active objects, describing the currently active transactions.

Returns:

an array of Active transactions

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object