0g-chain/cmd/kava/opendb/metrics.go
Evgeniy Scherbina d91bd688e7
Rocksdb Metrics (#1692)
* Rocksdb Metrics

* Add rocksdb namespace for options

* Adding help to the metrics

* CR's fixes

* CR's fixes

* CR's fixes
2023-09-05 10:33:25 -04:00

167 lines
5.4 KiB
Go

//go:build rocksdb
// +build rocksdb
package opendb
import (
"github.com/go-kit/kit/metrics"
"github.com/go-kit/kit/metrics/prometheus"
stdprometheus "github.com/prometheus/client_golang/prometheus"
)
// rocksdbMetrics will be initialized in registerMetrics() if enableRocksdbMetrics flag set to true
var rocksdbMetrics *Metrics
// Metrics contains all rocksdb metrics which will be reported to prometheus
type Metrics struct {
// Keys
NumberKeysWritten metrics.Gauge
NumberKeysRead metrics.Gauge
NumberKeysUpdated metrics.Gauge
EstimateNumKeys metrics.Gauge
// Files
NumberFileOpens metrics.Gauge
NumberFileErrors metrics.Gauge
// Memory
BlockCacheUsage metrics.Gauge
EstimateTableReadersMem metrics.Gauge
CurSizeAllMemTables metrics.Gauge
BlockCachePinnedUsage metrics.Gauge
// Cache
BlockCacheMiss metrics.Gauge
BlockCacheHit metrics.Gauge
BlockCacheAdd metrics.Gauge
BlockCacheAddFailures metrics.Gauge
}
// registerMetrics registers metrics in prometheus and initializes rocksdbMetrics variable
func registerMetrics() {
if rocksdbMetrics != nil {
// metrics already registered
return
}
labels := make([]string, 0)
rocksdbMetrics = &Metrics{
// Keys
NumberKeysWritten: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "key",
Name: "number_keys_written",
Help: "",
}, labels),
NumberKeysRead: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "key",
Name: "number_keys_read",
Help: "",
}, labels),
NumberKeysUpdated: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "key",
Name: "number_keys_updated",
Help: "",
}, labels),
EstimateNumKeys: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "key",
Name: "estimate_num_keys",
Help: "estimated number of total keys in the active and unflushed immutable memtables and storage",
}, labels),
// Files
NumberFileOpens: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "file",
Name: "number_file_opens",
Help: "",
}, labels),
NumberFileErrors: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "file",
Name: "number_file_errors",
Help: "",
}, labels),
// Memory
BlockCacheUsage: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "memory",
Name: "block_cache_usage",
Help: "memory size for the entries residing in block cache",
}, labels),
EstimateTableReadersMem: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "memory",
Name: "estimate_table_readers_mem",
Help: "estimated memory used for reading SST tables, excluding memory used in block cache (e.g., filter and index blocks)",
}, labels),
CurSizeAllMemTables: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "memory",
Name: "cur_size_all_mem_tables",
Help: "approximate size of active and unflushed immutable memtables (bytes)",
}, labels),
BlockCachePinnedUsage: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "memory",
Name: "block_cache_pinned_usage",
Help: "returns the memory size for the entries being pinned",
}, labels),
// Cache
BlockCacheMiss: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "cache",
Name: "block_cache_miss",
Help: "block_cache_miss == block_cache_index_miss + block_cache_filter_miss + block_cache_data_miss",
}, labels),
BlockCacheHit: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "cache",
Name: "block_cache_hit",
Help: "block_cache_hit == block_cache_index_hit + block_cache_filter_hit + block_cache_data_hit",
}, labels),
BlockCacheAdd: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "cache",
Name: "block_cache_add",
Help: "number of blocks added to block cache",
}, labels),
BlockCacheAddFailures: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "rocksdb",
Subsystem: "cache",
Name: "block_cache_add_failures",
Help: "number of failures when adding blocks to block cache",
}, labels),
}
}
// report reports metrics to prometheus based on rocksdb props and stats
func (m *Metrics) report(props *properties, stats *stats) {
// Keys
m.NumberKeysWritten.Set(float64(stats.NumberKeysWritten))
m.NumberKeysRead.Set(float64(stats.NumberKeysRead))
m.NumberKeysUpdated.Set(float64(stats.NumberKeysUpdated))
m.EstimateNumKeys.Set(float64(props.EstimateNumKeys))
// Files
m.NumberFileOpens.Set(float64(stats.NumberFileOpens))
m.NumberFileErrors.Set(float64(stats.NumberFileErrors))
// Memory
m.BlockCacheUsage.Set(float64(props.BlockCacheUsage))
m.EstimateTableReadersMem.Set(float64(props.EstimateTableReadersMem))
m.CurSizeAllMemTables.Set(float64(props.CurSizeAllMemTables))
m.BlockCachePinnedUsage.Set(float64(props.BlockCachePinnedUsage))
// Cache
m.BlockCacheMiss.Set(float64(stats.BlockCacheMiss))
m.BlockCacheHit.Set(float64(stats.BlockCacheHit))
m.BlockCacheAdd.Set(float64(stats.BlockCacheAdd))
m.BlockCacheAddFailures.Set(float64(stats.BlockCacheAddFailures))
}