Block validator buckets (#8395)

* Block validator buckets

* add more buckets to blocked collector list

Co-authored-by: rauljordan <raul@prysmaticlabs.com>

validator/db/kv/db.go

@@ -33,6 +33,20 @@ var (
 	ProtectionDbFileName = "validator.db"
 )
 
+// blockedBuckets represents the buckets that we want to restrict
+// from our metrics fetching for performance reasons. For a detailed
+// summary, it can be read in https://github.com/prysmaticlabs/prysm/issues/8274.
+var blockedBuckets = [][]byte{
+	deprecatedAttestationHistoryBucket,
+	lowestSignedSourceBucket,
+	lowestSignedTargetBucket,
+	lowestSignedProposalsBucket,
+	highestSignedProposalsBucket,
+	pubKeysBucket,
+	attestationSigningRootsBucket,
+	attestationSourceEpochsBucket,
+}
+
 // Store defines an implementation of the Prysm Database interface
 // using BoltDB as the underlying persistent kv-store for eth2.
 type Store struct {
@@ -171,5 +185,5 @@ func (s *Store) Size() (int64, error) {
 
 // createBoltCollector returns a prometheus collector specifically configured for boltdb.
 func createBoltCollector(db *bolt.DB) prometheus.Collector {
-	return prombolt.New("boltDB", db)
+	return prombolt.New("boltDB", db, blockedBuckets...)
 }