Package io.deephaven.engine.table.impl.perf

Class QueryPerformanceLogThreshold

java.lang.Object

io.deephaven.engine.table.impl.perf.QueryPerformanceLogThreshold

public class QueryPerformanceLogThreshold
extends Object

This class encapsulates the parameters that control whether a given item (nugget or entry interval) is logged to one of our three performance logs.

Constructor Summary

Constructors

Constructor	Description
QueryPerformanceLogThreshold(String kind, long defaultDuration)	Create a log threshold object for a particular kind of log update.
QueryPerformanceLogThreshold(String kind, long defaultDuration, long defaultReadCount, long defaultMetadataOperationCount)	Create a log threshold object for a particular kind of log update.

Method Summary

Modifier and Type	Method	Description
boolean	shouldLog(long duration, long dataReadCount, long metadataOperationCount)	Should this item be logged?

Methods inherited from class java.lang.Object

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

Constructor Details

QueryPerformanceLogThreshold

public QueryPerformanceLogThreshold(String kind,
 long defaultDuration,
 long defaultReadCount,
 long defaultMetadataOperationCount)

Create a log threshold object for a particular kind of log update.

• "" is for instrumented QueryPerformanceLog/QueryOperationPerformanceLog nuggets
• "Uninstrumented" is for uninstrumented QueryPerformanceLog/QueryOperationPerformanceLog nuggets, and
• "Update" is for UpdatePerformanceLog entry intervals.

Parameters:

kind - kind of update to derive property names

defaultDuration - default value for duration nanos

defaultReadCount - default value for the minimum read count threshold

defaultMetadataOperationCount - default value for the minimum metadata operation count threshold

QueryPerformanceLogThreshold

public QueryPerformanceLogThreshold(String kind,
 long defaultDuration)

Create a log threshold object for a particular kind of log update. The minimum read count defaults to 1.

• "" is for instrumented QueryPerformanceLog/QueryOperationPerformanceLog nuggets
• "Uninstrumented" is for uninstrumented QueryPerformanceLog/QueryOperationPerformanceLog nuggets, and
• "Update" is for UpdatePerformanceLog entry intervals.

Parameters:

kind - kind of update to derive property names

defaultDuration - default value for duration nanos

Method Details

shouldLog

public boolean shouldLog(long duration,
 long dataReadCount,
 long metadataOperationCount)

Should this item be logged?

Parameters:

duration - the duration (or usage) of the item

dataReadCount - the number of data read operations performed

metadataOperationCount - the number of metadata operations performed

Returns:

true if the item exceeds our logging threshold, and thus should be logged