com.mysql.cj.log

Class BaseMetricsHolder

java.lang.Object

com.mysql.cj.log.BaseMetricsHolder

public class BaseMetricsHolder
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
private static int	HISTOGRAM_BUCKETS
private long	longestQueryTimeMs If gathering metrics, what was the execution time of the longest query so far ?
private long	maximumNumberTablesAccessed
private long	minimumNumberTablesAccessed
private long	numberOfPreparedExecutes When was the last time we reported metrics?
private long	numberOfPrepares
private long	numberOfQueriesIssued
private long	numberOfResultSetsCreated
private long[]	numTablesMetricsHistBreakpoints
private int[]	numTablesMetricsHistCounts
private long[]	oldHistBreakpoints
private int[]	oldHistCounts
private long[]	perfMetricsHistBreakpoints
private int[]	perfMetricsHistCounts
private long	queryTimeCount
private double	queryTimeMean
private double	queryTimeSum
private double	queryTimeSumSquares
private long	shortestQueryTimeMs
private double	totalQueryTimeMs

Constructor Summary

Constructors

Constructor and Description
BaseMetricsHolder()

Method Summary

Modifier and Type	Method and Description
private void	addToHistogram(int[] histogramCounts, long[] histogramBreakpoints, long value, int numberOfTimes, long currentLowerBound, long currentUpperBound)
private void	addToPerformanceHistogram(long value, int numberOfTimes)
private void	addToTablesAccessedHistogram(long value, int numberOfTimes)
boolean	checkAbonormallyLongQuery(long millisOrNanos) Update statistics that allows the driver to determine if a query is slow enough to be logged, and return the estimation result for millisOrNanos value.
private void	checkAndCreatePerformanceHistogram()
private void	checkAndCreateTablesAccessedHistogram()
private void	createInitialHistogram(long[] breakpoints, long lowerBound, long upperBound)
void	incrementNumberOfPreparedExecutes()
void	incrementNumberOfPrepares()
void	incrementNumberOfResultSetsCreated()
void	registerQueryExecutionTime(long queryTimeMs)
private void	repartitionHistogram(int[] histCounts, long[] histBreakpoints, long currentLowerBound, long currentUpperBound)
private void	repartitionPerformanceHistogram()
private void	repartitionTablesAccessedHistogram()
void	reportMetrics(Log log)
void	reportNumberOfTablesAccessed(int numTablesAccessed)
void	reportQueryTime(long millisOrNanos)

Methods inherited from class java.lang.Object

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

Field Detail

HISTOGRAM_BUCKETS

private static final int HISTOGRAM_BUCKETS

See Also:

Constant Field Values

longestQueryTimeMs

private long longestQueryTimeMs

If gathering metrics, what was the execution time of the longest query so far ?

maximumNumberTablesAccessed

private long maximumNumberTablesAccessed

minimumNumberTablesAccessed

private long minimumNumberTablesAccessed

numberOfPreparedExecutes

private long numberOfPreparedExecutes

When was the last time we reported metrics?

numberOfPrepares

private long numberOfPrepares

numberOfQueriesIssued

private long numberOfQueriesIssued

numberOfResultSetsCreated

private long numberOfResultSetsCreated

numTablesMetricsHistBreakpoints

private long[] numTablesMetricsHistBreakpoints

numTablesMetricsHistCounts

private int[] numTablesMetricsHistCounts

oldHistBreakpoints

private long[] oldHistBreakpoints

oldHistCounts

private int[] oldHistCounts

shortestQueryTimeMs

private long shortestQueryTimeMs

totalQueryTimeMs

private double totalQueryTimeMs

perfMetricsHistBreakpoints

private long[] perfMetricsHistBreakpoints

perfMetricsHistCounts

private int[] perfMetricsHistCounts

queryTimeCount

private long queryTimeCount

queryTimeSum

private double queryTimeSum

queryTimeSumSquares

private double queryTimeSumSquares

queryTimeMean

private double queryTimeMean

Constructor Detail

BaseMetricsHolder

public BaseMetricsHolder()

Method Detail

createInitialHistogram

private void createInitialHistogram(long[] breakpoints,
                                    long lowerBound,
                                    long upperBound)

addToHistogram

private void addToHistogram(int[] histogramCounts,
                            long[] histogramBreakpoints,
                            long value,
                            int numberOfTimes,
                            long currentLowerBound,
                            long currentUpperBound)

addToPerformanceHistogram

private void addToPerformanceHistogram(long value,
                                       int numberOfTimes)

addToTablesAccessedHistogram

private void addToTablesAccessedHistogram(long value,
                                          int numberOfTimes)

checkAndCreatePerformanceHistogram

private void checkAndCreatePerformanceHistogram()

checkAndCreateTablesAccessedHistogram

private void checkAndCreateTablesAccessedHistogram()

registerQueryExecutionTime

public void registerQueryExecutionTime(long queryTimeMs)

Parameters:

queryTimeMs - query execution time in milliseconds

repartitionHistogram

private void repartitionHistogram(int[] histCounts,
                                  long[] histBreakpoints,
                                  long currentLowerBound,
                                  long currentUpperBound)

repartitionPerformanceHistogram

private void repartitionPerformanceHistogram()

repartitionTablesAccessedHistogram

private void repartitionTablesAccessedHistogram()

reportMetrics

public void reportMetrics(Log log)

reportNumberOfTablesAccessed

public void reportNumberOfTablesAccessed(int numTablesAccessed)

incrementNumberOfPreparedExecutes

public void incrementNumberOfPreparedExecutes()

incrementNumberOfPrepares

public void incrementNumberOfPrepares()

incrementNumberOfResultSetsCreated

public void incrementNumberOfResultSetsCreated()

reportQueryTime

public void reportQueryTime(long millisOrNanos)

checkAbonormallyLongQuery

public boolean checkAbonormallyLongQuery(long millisOrNanos)

Update statistics that allows the driver to determine if a query is slow enough to be logged, and return the estimation result for millisOrNanos value.

Used in case autoSlowLog=true.

Parameters:

millisOrNanos - query execution time

Returns:

true if millisOrNanos is outside the 99th percentile?