Module org.cojen.tupl

Package org.cojen.tupl.diag

Class DatabaseStats

java.lang.Object

org.cojen.tupl.diag.DatabaseStats

All Implemented Interfaces:

Serializable, Cloneable

public class DatabaseStats
extends Object
implements Cloneable, Serializable

Collection of database statistics.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
long	cachePages	The current size of the cache, in pages.
long	checkpointDuration	The time duration required for the last checkpoint to complete, in milliseconds.
long	cursorCount	The amount of cursors which are in a non-reset state.
long	dirtyPages	The count of pages which are dirty (need to be written with a checkpoint).
long	freePages	The amount of unused pages in the database.
long	lockCount	The amount of locks currently allocated.
int	openIndexes	The amount of indexes currently open.
int	pageSize	The allocation page size
long	replicationBacklog	The amount of log bytes that a replica must apply to be fully caught up to the leader.
long	totalPages	The total amount of pages in the database.
long	transactionCount	The amount of fully-established transactions which are in a non-reset state.

Constructor Summary

Constructors

Constructor	Description
DatabaseStats()

Method Summary

Modifier and Type	Method	Description
DatabaseStats	clone()
boolean	equals(Object obj)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

pageSize

public int pageSize

The allocation page size

freePages

public long freePages

The amount of unused pages in the database.

totalPages

public long totalPages

The total amount of pages in the database.

cachePages

public long cachePages

The current size of the cache, in pages.

dirtyPages

public long dirtyPages

The count of pages which are dirty (need to be written with a checkpoint).

openIndexes

public int openIndexes

The amount of indexes currently open.

lockCount

public long lockCount

The amount of locks currently allocated. Locks are created as transactions access or modify records, and they are destroyed when transactions exit or reset. An accumulation of locks can indicate that transactions are not being reset properly.

cursorCount

public long cursorCount

The amount of cursors which are in a non-reset state. An accumulation of cursors can indicate that they are not being reset properly.

transactionCount

public long transactionCount

The amount of fully-established transactions which are in a non-reset state. This value is unaffected by transactions which make no changes, and it is also unaffected by auto-commit transactions. An accumulation of transactions can indicate that they are not being reset properly.

checkpointDuration

public long checkpointDuration

The time duration required for the last checkpoint to complete, in milliseconds. If no checkpoints are running, then zero is returned.

replicationBacklog

public long replicationBacklog

The amount of log bytes that a replica must apply to be fully caught up to the leader. If the member is currently the leader, then the backlog is zero.

Constructor Details

DatabaseStats

public DatabaseStats()

Method Details

clone

public DatabaseStats clone()

Overrides:

clone in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object