Class TracingOptions
java.lang.Object
com.yahoo.vespa.streamingvisitors.TracingOptions
Encapsulates all trace-related components and options used by the streaming search Searcher.
Provides a DEFAULT static instance which has the following characteristics:
- Approximately 1 query every second is traced
- Trace level is set to 7 for traced queries
- Only emits traces for queries that have timed out and where the elapsed time is at least 2x
of the timeout specified in the query itself
- Emits traces to the Vespa log
- Only 2 traces every 10 seconds may be emitted to the log
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Field Summary
Modifier and TypeFieldDescriptionstatic final TracingOptions
static final int
static final double
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Constructor Summary
ConstructorDescriptionTracingOptions
(SamplingStrategy samplingStrategy, TraceExporter traceExporter, MonotonicNanoClock clock, int traceLevelOverride, double traceTimeoutMultiplierThreshold) -
Method Summary
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Field Details
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DEFAULT
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DEFAULT_TRACE_LEVEL_OVERRIDE
public static final int DEFAULT_TRACE_LEVEL_OVERRIDE- See Also:
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TRACE_TIMEOUT_MULTIPLIER_THRESHOLD
public static final double TRACE_TIMEOUT_MULTIPLIER_THRESHOLD- See Also:
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Constructor Details
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TracingOptions
public TracingOptions(SamplingStrategy samplingStrategy, TraceExporter traceExporter, MonotonicNanoClock clock, int traceLevelOverride, double traceTimeoutMultiplierThreshold) - Parameters:
samplingStrategy
- used for choosing if a query should have its trace level implicitly altered.traceExporter
- used for emitting a visitor session trace to someplace it may be debugged later.clock
- monotonic clock used for relative time tracking.traceLevelOverride
- if a query is trace-sampled, its traceLevel will be set to this valuetraceTimeoutMultiplierThreshold
- only export traces if the elapsed time is greater than the query timeout * this value
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Method Details
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getSamplingStrategy
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getTraceExporter
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getClock
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getTraceLevelOverride
public int getTraceLevelOverride() -
getTraceTimeoutMultiplierThreshold
public double getTraceTimeoutMultiplierThreshold()
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