com.bigdata.bop.engine

Class QueryEngineCounters

java.lang.Object

com.bigdata.bop.engine.QueryEngineCounters

All Implemented Interfaces:

ICounterSetAccess

Direct Known Subclasses:

FederatedQueryEngineCounters

public class QueryEngineCounters
extends Object
implements ICounterSetAccess

QueryEngine performance counters.

Author:

thompsonbry

Field Summary

Fields

Modifier and Type	Field and Description
protected CAT	blockedWorkQueueCount The #of work queues which are currently blocked.
protected CAT	blockedWorkQueueRunningTotal The #of times that a work queue has blocked.
protected CAT	bufferedChunkMessageBytesOnNativeHeap The total number of bytes for solutions currently buffered on the native heap for the input queues for operators on the query engine.
protected CAT	bufferedChunkMessageCount The total number of chunks of solutions currently buffered for the input queues for operators on the query engine (regardless of whether the native heap or the managed object heap is being used).
protected CAT	deadlineQueueSize The size of the deadline queue.
protected CAT	elapsedMillis The total elapsed time (millis) for evaluation queries.
protected CAT	operatorActiveCount The #of active operator evaluation tasks (chunk tasks).
protected CAT	operatorHaltCount The #of operator evaluation tasks (chunk tasks) which have ended.
protected CAT	operatorStartCount The #of operator evaluation tasks (chunk tasks) which have started.
protected CAT	queryDoneCount The #of queries which have been executed (set on completion).
protected CAT	queryErrorCount The #of instances of the query which terminated abnormally.
protected CAT	queryStartCount The #of queries which have been executed (set on completion).
protected CAT	runningQueriesCount Running queries count.

Constructor Summary

Constructors

Constructor and Description
QueryEngineCounters()

Method Summary

Methods

Modifier and Type	Method and Description
CounterSet	getCounters() Return performance counters.

Methods inherited from class java.lang.Object

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

Field Detail

queryStartCount

protected final CAT queryStartCount

The #of queries which have been executed (set on completion).

queryDoneCount

protected final CAT queryDoneCount

The #of queries which have been executed (set on completion).

Note: This counts both normal and abnormal query termination.

queryErrorCount

protected final CAT queryErrorCount

The #of instances of the query which terminated abnormally.

elapsedMillis

protected final CAT elapsedMillis

The total elapsed time (millis) for evaluation queries. This is the wall clock time per query. The aggregated wall clock time per query will sum to greater than the elapsed wall clock time in any interval where there is more than one query running concurrently.

blockedWorkQueueCount

protected final CAT blockedWorkQueueCount

The #of work queues which are currently blocked.

blockedWorkQueueRunningTotal

protected final CAT blockedWorkQueueRunningTotal

The #of times that a work queue has blocked.

bufferedChunkMessageCount

protected final CAT bufferedChunkMessageCount

The total number of chunks of solutions currently buffered for the input queues for operators on the query engine (regardless of whether the native heap or the managed object heap is being used).

See Also:

(Vector query engine on native heap).

bufferedChunkMessageBytesOnNativeHeap

protected final CAT bufferedChunkMessageBytesOnNativeHeap

The total number of bytes for solutions currently buffered on the native heap for the input queues for operators on the query engine.

See Also:

(Vector query engine on native heap).

operatorActiveCount

protected final CAT operatorActiveCount

The #of active operator evaluation tasks (chunk tasks).

operatorStartCount

protected final CAT operatorStartCount

The #of operator evaluation tasks (chunk tasks) which have started.

operatorHaltCount

protected final CAT operatorHaltCount

The #of operator evaluation tasks (chunk tasks) which have ended.

deadlineQueueSize

protected final CAT deadlineQueueSize

The size of the deadline queue.

See Also:

Query timeout only checked at operator start/stop.

runningQueriesCount

protected final CAT runningQueriesCount

Running queries count.

Constructor Detail

QueryEngineCounters

public QueryEngineCounters()

Method Detail

getCounters

public CounterSet getCounters()

Description copied from interface: ICounterSetAccess

Return performance counters.

Specified by:

getCounters in interface ICounterSetAccess