org.apache.ignite

Interface DataStorageMetrics

All Known Subinterfaces:

DataStorageMetricsMXBean

All Known Implementing Classes:

DataStorageMetricsImpl, DataStorageMetricsSnapshot

public interface DataStorageMetrics

Data storage metrics are used to obtain statistics on persistent store and whole data storage.

Method Summary

Methods

Modifier and Type	Method and Description
long	getLastCheckpointCopiedOnWritePagesNumber() Gets the number of pages copied to a temporary checkpoint buffer during the last checkpoint.
long	getLastCheckpointDataPagesNumber() Gets the number of data pages written during the last checkpoint.
long	getLastCheckpointDuration() Gets the duration of the last checkpoint in milliseconds.
long	getLastCheckpointFsyncDuration() Gets the duration of the sync phase of the last checkpoint in milliseconds.
long	getLastCheckpointLockWaitDuration() Gets the duration of last checkpoint lock wait in milliseconds.
long	getLastCheckpointMarkDuration() Gets the duration of last checkpoint mark phase in milliseconds.
long	getLastCheckpointPagesWriteDuration() Gets the duration of last checkpoint pages write phase in milliseconds.
long	getLastCheckpointTotalPagesNumber() Gets the total number of pages written during the last checkpoint.
int	getWalArchiveSegments() Gets the current number of WAL segments in the WAL archive.
float	getWalFsyncTimeAverage() Gets the average WAL fsync duration in microseconds over the last time interval.
float	getWalLoggingRate() Gets the average number of WAL records per second written during the last time interval.
float	getWalWritingRate() Gets the average number of bytes per second written during the last time interval.

Method Detail

getWalLoggingRate

float getWalLoggingRate()

Gets the average number of WAL records per second written during the last time interval.

The length of time interval is configured via DataStorageConfiguration.setMetricsRateTimeInterval(long) configurartion property. The number of subintervals is configured via DataStorageConfiguration.setMetricsSubIntervalCount(int) configuration property.

getWalWritingRate

float getWalWritingRate()

Gets the average number of bytes per second written during the last time interval. The length of time interval is configured via DataStorageConfiguration.setMetricsRateTimeInterval(long) configurartion property. The number of subintervals is configured via DataStorageConfiguration.setMetricsSubIntervalCount(int) configuration property.

getWalArchiveSegments

int getWalArchiveSegments()

Gets the current number of WAL segments in the WAL archive.

getWalFsyncTimeAverage

float getWalFsyncTimeAverage()

Gets the average WAL fsync duration in microseconds over the last time interval.

The length of time interval is configured via DataStorageConfiguration.setMetricsRateTimeInterval(long) configurartion property. The number of subintervals is configured via DataStorageConfiguration.setMetricsSubIntervalCount(int) configuration property.

getLastCheckpointDuration

long getLastCheckpointDuration()

Gets the duration of the last checkpoint in milliseconds.

Returns:

Total checkpoint duration in milliseconds.

getLastCheckpointLockWaitDuration

long getLastCheckpointLockWaitDuration()

Gets the duration of last checkpoint lock wait in milliseconds.

Returns:

Checkpoint lock wait time in milliseconds.

getLastCheckpointMarkDuration

long getLastCheckpointMarkDuration()

Gets the duration of last checkpoint mark phase in milliseconds.

Returns:

Checkpoint mark duration in milliseconds.

getLastCheckpointPagesWriteDuration

long getLastCheckpointPagesWriteDuration()

Gets the duration of last checkpoint pages write phase in milliseconds.

Returns:

Checkpoint pages write phase in milliseconds.

getLastCheckpointFsyncDuration

long getLastCheckpointFsyncDuration()

Gets the duration of the sync phase of the last checkpoint in milliseconds.

Returns:

Checkpoint fsync time in milliseconds.

getLastCheckpointTotalPagesNumber

long getLastCheckpointTotalPagesNumber()

Gets the total number of pages written during the last checkpoint.

Returns:

Total number of pages written during the last checkpoint.

getLastCheckpointDataPagesNumber

long getLastCheckpointDataPagesNumber()

Gets the number of data pages written during the last checkpoint.

Returns:

Total number of data pages written during the last checkpoint.

getLastCheckpointCopiedOnWritePagesNumber

long getLastCheckpointCopiedOnWritePagesNumber()

Gets the number of pages copied to a temporary checkpoint buffer during the last checkpoint.

Returns:

Total number of pages copied to a temporary checkpoint buffer during the last checkpoint.