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@ -75,7 +75,7 @@ type Database struct { |
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seekCompGauge metrics.Gauge // Gauge for tracking the number of table compaction caused by read opt
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manualMemAllocGauge metrics.Gauge // Gauge to track the amount of memory that has been manually allocated (not a part of runtime/GC)
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levelsGauge [7]metrics.Gauge // Gauge for tracking the number of tables in levels
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levelsGauge []metrics.Gauge // Gauge for tracking the number of tables in levels
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quitLock sync.Mutex // Mutex protecting the quit channel access
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quitChan chan chan error // Quit channel to stop the metrics collection before closing the database
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@ -146,13 +146,8 @@ func NewCustom(file string, namespace string, customize func(options *opt.Option |
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ldb.seekCompGauge = metrics.NewRegisteredGauge(namespace+"compact/seek", nil) |
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ldb.manualMemAllocGauge = metrics.NewRegisteredGauge(namespace+"memory/manualalloc", nil) |
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// leveldb has only up to 7 levels
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for i := range ldb.levelsGauge { |
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ldb.levelsGauge[i] = metrics.NewRegisteredGauge(namespace+fmt.Sprintf("tables/level%v", i), nil) |
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} |
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// Start up the metrics gathering and return
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go ldb.meter(metricsGatheringInterval) |
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go ldb.meter(metricsGatheringInterval, namespace) |
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return ldb, nil |
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} |
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@ -271,7 +266,7 @@ func (db *Database) Path() string { |
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// meter periodically retrieves internal leveldb counters and reports them to
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// the metrics subsystem.
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func (db *Database) meter(refresh time.Duration) { |
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func (db *Database) meter(refresh time.Duration, namespace string) { |
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// Create the counters to store current and previous compaction values
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compactions := make([][]int64, 2) |
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for i := 0; i < 2; i++ { |
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@ -360,8 +355,11 @@ func (db *Database) meter(refresh time.Duration) { |
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db.nonlevel0CompGauge.Update(int64(stats.NonLevel0Comp)) |
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db.seekCompGauge.Update(int64(stats.SeekComp)) |
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// update tables amount
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for i, tables := range stats.LevelTablesCounts { |
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// Append metrics for additional layers
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if i >= len(db.levelsGauge) { |
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db.levelsGauge = append(db.levelsGauge, metrics.NewRegisteredGauge(namespace+fmt.Sprintf("tables/level%v", i), nil)) |
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} |
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db.levelsGauge[i].Update(int64(tables)) |
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} |
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