src/kudu/util/cache_metrics.h

// Copyright 2014 Cloudera, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef KUDU_UTIL_CACHE_METRICS_H
#define KUDU_UTIL_CACHE_METRICS_H

#include <stdint.h>

#include "kudu/gutil/macros.h"
#include "kudu/gutil/ref_counted.h"

namespace kudu {

template<class T>
class AtomicGauge;
class Counter;
class MetricEntity;

struct CacheMetrics {
  explicit CacheMetrics(const scoped_refptr<MetricEntity>& metric_entity);

  scoped_refptr<Counter> inserts;
  scoped_refptr<Counter> lookups;
  scoped_refptr<Counter> evictions;
  scoped_refptr<Counter> cache_hits;
  scoped_refptr<Counter> cache_hits_caching;
  scoped_refptr<Counter> cache_misses;
  scoped_refptr<Counter> cache_misses_caching;

  scoped_refptr<AtomicGauge<uint64_t> > cache_usage;
};

} // namespace kudu
#endif /* KUDU_UTIL_CACHE_METRICS_H */