org.apache.ignite.internal.metric

Class SqlMemoryStatisticsHolder

java.lang.Object

org.apache.ignite.internal.metric.SqlMemoryStatisticsHolder

public class SqlMemoryStatisticsHolder
extends Object

Holds metrics of heap memory usage by sql queries. One instance per node.

See Also:

QueryMemoryManager

Field Summary

Fields

Modifier and Type	Field and Description
static String	SQL_QUOTAS_REG_NAME Name of MetricRegistry that contains for sql purposes.

Constructor Summary

Constructors

Constructor and Description
SqlMemoryStatisticsHolder(QueryMemoryManager memMgr, GridMetricManager metricMgr) Creates this metrics holder.

Method Summary

Modifier and Type	Method and Description
void	trackOffloadingRead(long read) Updates statistics for bytes read from the disk during offloading.
void	trackOffloadingWritten(long written) Updates statistics for bytes written to the disk during offloading.
void	trackQueryOffloaded() Increments the number of offloaded queries
void	trackReserve() Updates statistics when memory is reserved for any query.

Methods inherited from class java.lang.Object

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

Field Detail

SQL_QUOTAS_REG_NAME

public static final String SQL_QUOTAS_REG_NAME

Name of MetricRegistry that contains for sql purposes.

See Also:

Constant Field Values

Constructor Detail

SqlMemoryStatisticsHolder

public SqlMemoryStatisticsHolder(QueryMemoryManager memMgr,
                                 GridMetricManager metricMgr)

Creates this metrics holder.

Parameters:

memMgr - Memory manager which tracks sql memory.

metricMgr - registers and exports outside this class metrics.

Method Detail

trackReserve

public void trackReserve()

Updates statistics when memory is reserved for any query. Thread safe.

trackOffloadingWritten

public void trackOffloadingWritten(long written)

Updates statistics for bytes written to the disk during offloading.

Parameters:

written - Bytes written.

trackOffloadingRead

public void trackOffloadingRead(long read)

Updates statistics for bytes read from the disk during offloading.

Parameters:

read - Bytes read.

trackQueryOffloaded

public void trackQueryOffloaded()

Increments the number of offloaded queries