/
metrics.go
51 lines (44 loc) · 1.86 KB
/
metrics.go
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// Copyright 2022 The OPA Authors. All rights reserved.
// Use of this source code is governed by an Apache2
// license that can be found in the LICENSE file.
package disk
import (
"github.com/prometheus/client_golang/prometheus"
)
var (
// storage read transactions never delete or write
keysReadPerStoreRead = newHist("keys_read_per_store_read_txn", "How many database reads had to occur for a storage read transaction")
bytesReadPerStoreRead = newHist("key_bytes_read_per_store_read_txn", "How many bytes of data were read for a storage read transaction")
keysReadPerStoreWrite = newHist("keys_read_per_store_write_txn", "How many database reads had to occur for a storage write transaction")
keysWrittenPerStoreWrite = newHist("keys_written_per_store_write_txn", "How many database writes had to occur for a storage write transaction")
keysDeletedPerStoreWrite = newHist("keys_deleted_per_store_write_txn", "How many database writes had to occur for a storage write transaction")
bytesReadPerStoreWrite = newHist("key_bytes_read_per_store_write_txn", "How many bytes of data were read for a storage write transaction")
)
func initPrometheus(reg prometheus.Registerer) error {
for _, hist := range []prometheus.Histogram{
keysReadPerStoreRead,
bytesReadPerStoreRead,
keysReadPerStoreWrite,
keysWrittenPerStoreWrite,
keysDeletedPerStoreWrite,
bytesReadPerStoreWrite,
} {
if err := reg.Register(hist); err != nil {
return err
}
}
return nil
}
func newHist(name, desc string) prometheus.Histogram {
return prometheus.NewHistogram(prometheus.HistogramOpts{
Name: name,
Help: desc,
Buckets: prometheus.LinearBuckets(1, 1, 10), // TODO different buckets? exp?
})
}
func forwardMetric(m map[string]interface{}, counter string, hist prometheus.Histogram) {
key := "counter_" + counter
if s, ok := m[key]; ok {
hist.Observe(float64(s.(uint64)))
}
}