org.apache.ignite.internal.processors.query.stat

Interface IgniteStatisticsManager

All Known Implementing Classes:

IgniteStatisticsManagerImpl

public interface IgniteStatisticsManager

Statistics manager. Coordinate statistics collection and act as source of statistics.

Method Summary

Modifier and Type	Method and Description
void	collectStatistics(StatisticsObjectConfiguration... targets) Gather object statistics.
void	dropAll() Drop all statistics.
void	dropStatistics(StatisticsTarget... targets) Clear object statistics.
ObjectStatistics	getGlobalStatistics(StatisticsKey key) Get global statistics by object.
ObjectStatistics	getLocalStatistics(StatisticsKey key) Get local statistics by object.
void	onRowUpdated(String schemaName, String objName, int partId, byte[] keyBytes) To track statistics invalidation.
void	refreshStatistics(StatisticsTarget... targets) Refresh object statistics.
void	stop() Stop statistic manager.
StatisticsUsageState	usageState()
void	usageState(StatisticsUsageState state) Set statistics usage state.

Method Detail

collectStatistics

void collectStatistics(StatisticsObjectConfiguration... targets)
                throws IgniteCheckedException

Gather object statistics.

Parameters:

targets - Target to params map to gather statistics by.

Throws:

IgniteCheckedException - Throws in case of errors.

dropStatistics

void dropStatistics(StatisticsTarget... targets)
             throws IgniteCheckedException

Clear object statistics.

Parameters:

targets - Collection of target to collect statistics by (schema, obj, columns).

Throws:

IgniteCheckedException - In case of errors (for example: unsupported feature)

refreshStatistics

void refreshStatistics(StatisticsTarget... targets)
                throws IgniteCheckedException

Refresh object statistics.

Parameters:

targets - Target to refresh statistics by.

Throws:

IgniteCheckedException - Throws in case of errors.

dropAll

void dropAll()
      throws IgniteCheckedException

Drop all statistics.

Throws:

IgniteCheckedException

getLocalStatistics

ObjectStatistics getLocalStatistics(StatisticsKey key)

Get local statistics by object.

Parameters:

key - Statistic key.

Returns:

Object statistics or null if there are no available statistics by specified object.

getGlobalStatistics

ObjectStatistics getGlobalStatistics(StatisticsKey key)

Get global statistics by object.

Parameters:

key - Statistic key.

Returns:

Object statistics of null if there are no available global statistics by specified object.

stop

void stop()

Stop statistic manager.

usageState

void usageState(StatisticsUsageState state)
         throws IgniteCheckedException

Set statistics usage state.

Parameters:

state - Statistics state.

Throws:

IgniteCheckedException

usageState

StatisticsUsageState usageState()

Returns:

Statistics usage state.

onRowUpdated

void onRowUpdated(String schemaName,
                  String objName,
                  int partId,
                  byte[] keyBytes)

To track statistics invalidation. Skip value if no statistics for the given table exists.

Parameters:

schemaName - Schema name.

objName - Object name.

partId - Partition id.

keyBytes - Row key bytes.