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authorPéter Szilágyi <peterke@gmail.com>2015-06-23 23:36:08 +0800
committerPéter Szilágyi <peterke@gmail.com>2015-06-24 23:34:05 +0800
commit803b3c4a825ed0ac5d22c93fc3159651b8c590b2 (patch)
tree1c36d4edcf7f341dfbc177b45ed2b8df2cb0a7e9 /ethdb/database.go
parent0609fcf030f5e93528501e6fea98e096feccec3c (diff)
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eth, ethdb: measure database operation latencies too
Diffstat (limited to 'ethdb/database.go')
-rw-r--r--ethdb/database.go39
1 files changed, 28 insertions, 11 deletions
diff --git a/ethdb/database.go b/ethdb/database.go
index 13b4ef449..32ce845a0 100644
--- a/ethdb/database.go
+++ b/ethdb/database.go
@@ -1,6 +1,8 @@
package ethdb
import (
+ "time"
+
"github.com/ethereum/go-ethereum/compression/rle"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
@@ -17,9 +19,10 @@ type LDBDatabase struct {
fn string // filename for reporting
db *leveldb.DB // LevelDB instance
- GetMeter metrics.Meter // Meter for measuring the database get request counts
- PutMeter metrics.Meter // Meter for measuring the database put request counts
- DelMeter metrics.Meter // Meter for measuring the database delete request counts
+ GetTimer metrics.Timer // Timer for measuring the database get request counts and latencies
+ PutTimer metrics.Timer // Timer for measuring the database put request counts and latencies
+ DelTimer metrics.Timer // Timer for measuring the database delete request counts and latencies
+ MissMeter metrics.Meter // MEter for measuring the missed database get requests
ReadMeter metrics.Meter // Meter for measuring the database get request data usage
WriteMeter metrics.Meter // Meter for measuring the database put request data usage
}
@@ -48,10 +51,14 @@ func NewLDBDatabase(file string) (*LDBDatabase, error) {
// Put puts the given key / value to the queue
func (self *LDBDatabase) Put(key []byte, value []byte) error {
- dat := rle.Compress(value)
- if self.PutMeter != nil {
- self.PutMeter.Mark(1)
+ // Measure the database put latency, if requested
+ if self.PutTimer != nil {
+ start := time.Now()
+ defer self.PutTimer.UpdateSince(start)
}
+ // Generate the data to write to disk, update the meter and write
+ dat := rle.Compress(value)
+
if self.WriteMeter != nil {
self.WriteMeter.Mark(int64(len(dat)))
}
@@ -60,13 +67,20 @@ func (self *LDBDatabase) Put(key []byte, value []byte) error {
// Get returns the given key if it's present.
func (self *LDBDatabase) Get(key []byte) ([]byte, error) {
+ // Measure the database get latency, if requested
+ if self.GetTimer != nil {
+ start := time.Now()
+ defer self.GetTimer.UpdateSince(start)
+ }
+ // Retrieve the key and increment the miss counter if not found
dat, err := self.db.Get(key, nil)
if err != nil {
+ if self.MissMeter != nil {
+ self.MissMeter.Mark(1)
+ }
return nil, err
}
- if self.GetMeter != nil {
- self.GetMeter.Mark(1)
- }
+ // Otherwise update the actually retrieved amount of data
if self.ReadMeter != nil {
self.ReadMeter.Mark(int64(len(dat)))
}
@@ -75,9 +89,12 @@ func (self *LDBDatabase) Get(key []byte) ([]byte, error) {
// Delete deletes the key from the queue and database
func (self *LDBDatabase) Delete(key []byte) error {
- if self.DelMeter != nil {
- self.DelMeter.Mark(1)
+ // Measure the database delete latency, if requested
+ if self.DelTimer != nil {
+ start := time.Now()
+ defer self.DelTimer.UpdateSince(start)
}
+ // Execute the actual operation
return self.db.Delete(key, nil)
}