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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/metrics/valuemetric.h>
#include <vespa/metrics/countmetric.h>
namespace metrics { class MetricSet; }
namespace storage {
// Provides a convenient wrapper for all MergeHandler-related metrics.
// This is _not_ its own MetricSet; metrics are owned by an explicitly provided
// parent. This is to prevent metric paths from changing, as external aggregation
// depends on the existing paths.
struct MergeHandlerMetrics {
metrics::LongCountMetric bytesMerged;
// Aggregate metrics:
metrics::DoubleAverageMetric mergeLatencyTotal;
metrics::DoubleAverageMetric mergeMetadataReadLatency;
metrics::DoubleAverageMetric mergeDataReadLatency;
metrics::DoubleAverageMetric mergeDataWriteLatency;
metrics::DoubleAverageMetric mergeAverageDataReceivedNeeded;
// Individual operation metrics. These capture both count and latency sum, so
// no need for explicit count metric on the side.
metrics::DoubleAverageMetric put_latency;
metrics::DoubleAverageMetric remove_latency;
// Iteration over metadata and document payload data is already covered by
// the merge[Meta]Data(Read|Write)Latency metrics, so not repeated here. Can be
// explicitly added if deemed required.
explicit MergeHandlerMetrics(metrics::MetricSet* owner);
~MergeHandlerMetrics();
};
}
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