cmd/geth, ethdb/pebble: improve database statistic

cmd/geth/chaincmd.go

@@ -337,7 +337,7 @@ func importChain(ctx *cli.Context) error {
 	fmt.Printf("Import done in %v.\n\n", time.Since(start))
 
 	// Output pre-compaction stats mostly to see the import trashing
-	showLeveldbStats(db)
+	showDBStats(db)
 
 	// Print the memory statistics used by the importing
 	mem := new(runtime.MemStats)
@@ -360,7 +360,7 @@ func importChain(ctx *cli.Context) error {
 	}
 	fmt.Printf("Compaction done in %v.\n\n", time.Since(start))
 
-	showLeveldbStats(db)
+	showDBStats(db)
 	return importErr
 }
 

cmd/geth/dbcmd.go

@@ -407,7 +407,7 @@ func checkStateContent(ctx *cli.Context) error {
 	return nil
 }
 
-func showLeveldbStats(db ethdb.KeyValueStater) {
+func showDBStats(db ethdb.KeyValueStater) {
 	if stats, err := db.Stat("leveldb.stats"); err != nil {
 		log.Warn("Failed to read database stats", "error", err)
 	} else {
@@ -427,7 +427,7 @@ func dbStats(ctx *cli.Context) error {
 	db := utils.MakeChainDatabase(ctx, stack, true)
 	defer db.Close()
 
-	showLeveldbStats(db)
+	showDBStats(db)
 	return nil
 }
 
@@ -439,15 +439,15 @@ func dbCompact(ctx *cli.Context) error {
 	defer db.Close()
 
 	log.Info("Stats before compaction")
-	showLeveldbStats(db)
+	showDBStats(db)
 
 	log.Info("Triggering compaction")
 	if err := db.Compact(nil, nil); err != nil {
 		log.Info("Compact err", "error", err)
 		return err
 	}
 	log.Info("Stats after compaction")
-	showLeveldbStats(db)
+	showDBStats(db)
 	return nil
 }
 

ethdb/pebble/pebble.go

@@ -416,7 +416,7 @@ func upperBound(prefix []byte) (limit []byte) {
 }
 
 // Stat returns the internal metrics of Pebble in a text format. It's a developer
-// method to read everything there is to read independent of Pebble version.
+// method to read everything there is to read, independent of Pebble version.
 //
 // The property is unused in Pebble as there's only one thing to retrieve.
 func (d *Database) Stat(property string) (string, error) {