diff --git a/cmd/frostfs-node/config.go b/cmd/frostfs-node/config.go
index 5af37865f..336c4f9a5 100644
--- a/cmd/frostfs-node/config.go
+++ b/cmd/frostfs-node/config.go
@@ -884,7 +884,10 @@ func (c *cfg) engineOpts() []engine.Option {
 	)
 
 	if c.metricsCollector != nil {
-		opts = append(opts, engine.WithMetrics(c.metricsCollector.Engine()))
+		opts = append(opts,
+			engine.WithEngineMetrics(c.metricsCollector.Engine()),
+			engine.WithWritecacheMetrics(c.metricsCollector.Writecachce()),
+			engine.WithGCMetrics(c.metricsCollector.GC()))
 	}
 
 	return opts
diff --git a/internal/metrics/blobovnicza.go b/internal/metrics/blobovnicza.go
index 948272c88..2fa9e7454 100644
--- a/internal/metrics/blobovnicza.go
+++ b/internal/metrics/blobovnicza.go
@@ -12,7 +12,7 @@ import (
 type BlobobvnizcaMetrics interface {
 	SetBlobobvnizcaTreeMode(shardID, path string, mode mode.ComponentMode)
 	CloseBlobobvnizcaTree(shardID, path string)
-	BlobobvnizcaTreeMethodDuration(shardID, path string, method string, d time.Duration, success bool, withStorageID NullBool)
+	BlobobvnizcaTreeMethodDuration(shardID, path string, method string, d time.Duration, success bool, withStorageID string)
 	AddBlobobvnizcaTreePut(shardID, path string, size int)
 	AddBlobobvnizcaTreeGet(shardID, path string, size int)
 
@@ -128,13 +128,13 @@ func (b *blobovnicza) CloseBlobobvnizcaTree(shardID, path string) {
 	b.treeRebuildStatus.SetMode(shardID, path, undefinedStatus)
 }
 
-func (b *blobovnicza) BlobobvnizcaTreeMethodDuration(shardID, path string, method string, d time.Duration, success bool, withStorageID NullBool) {
+func (b *blobovnicza) BlobobvnizcaTreeMethodDuration(shardID, path string, method string, d time.Duration, success bool, withStorageID string) {
 	b.treeReqDuration.With(prometheus.Labels{
 		shardIDLabel:       shardID,
 		pathLabel:          path,
 		successLabel:       strconv.FormatBool(success),
 		methodLabel:        method,
-		withStorageIDLabel: withStorageID.String(),
+		withStorageIDLabel: withStorageID,
 	}).Observe(d.Seconds())
 }
 
diff --git a/internal/metrics/blobstore.go b/internal/metrics/blobstore.go
index d9bb3f029..36c25d347 100644
--- a/internal/metrics/blobstore.go
+++ b/internal/metrics/blobstore.go
@@ -12,7 +12,7 @@ type BlobstoreMetrics interface {
 	SetMode(shardID string, readOnly bool)
 	Close(shardID string)
 
-	MethodDuration(shardID string, method string, d time.Duration, success bool, withStorageID NullBool)
+	MethodDuration(shardID string, method string, d time.Duration, success bool, withStorageID string)
 	AddPut(shardID string, size int)
 	AddGet(shardID string, size int)
 }
@@ -65,12 +65,12 @@ func (m *blobstoreMetrics) Close(shardID string) {
 	})
 }
 
-func (m *blobstoreMetrics) MethodDuration(shardID string, method string, d time.Duration, success bool, withStorageID NullBool) {
+func (m *blobstoreMetrics) MethodDuration(shardID string, method string, d time.Duration, success bool, withStorageID string) {
 	m.reqDuration.With(prometheus.Labels{
 		shardIDLabel:       shardID,
 		successLabel:       strconv.FormatBool(success),
 		methodLabel:        method,
-		withStorageIDLabel: withStorageID.String(),
+		withStorageIDLabel: withStorageID,
 	}).Observe(d.Seconds())
 }
 
diff --git a/internal/metrics/engine.go b/internal/metrics/engine.go
index 1d01c95ed..caa0b0999 100644
--- a/internal/metrics/engine.go
+++ b/internal/metrics/engine.go
@@ -28,9 +28,6 @@ type EngineMetrics interface {
 	SetRefillPercent(shardID, path string, percent uint32)
 	SetRefillStatus(shardID, path, status string)
 	SetEvacuationInProgress(shardID string, value bool)
-
-	WriteCache() WriteCacheMetrics
-	GC() GCMetrics
 }
 
 type engineMetrics struct {
@@ -182,11 +179,11 @@ func (m *engineMetrics) SetMode(shardID string, mode mode.Mode) {
 	m.mode.SetMode(shardID, mode.String())
 }
 
-func (m *engineMetrics) WriteCache() WriteCacheMetrics {
+func (m *engineMetrics) WriteCache() any {
 	return m.writeCache
 }
 
-func (m *engineMetrics) GC() GCMetrics {
+func (m *engineMetrics) GC() any {
 	return m.gc
 }
 
diff --git a/internal/metrics/node.go b/internal/metrics/node.go
index 4ea3c7c24..535e151cb 100644
--- a/internal/metrics/node.go
+++ b/internal/metrics/node.go
@@ -79,6 +79,14 @@ func (m *NodeMetrics) Engine() EngineMetrics {
 	return m.engine
 }
 
+func (m *NodeMetrics) Writecachce() WriteCacheMetrics {
+	return m.engine.writeCache
+}
+
+func (m *NodeMetrics) GC() GCMetrics {
+	return m.engine.gc
+}
+
 func (m *NodeMetrics) State() StateMetrics {
 	return m.state
 }
diff --git a/internal/metrics/types.go b/internal/metrics/types.go
deleted file mode 100644
index 6a76248bf..000000000
--- a/internal/metrics/types.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package metrics
-
-import (
-	"strconv"
-)
-
-type NullBool struct {
-	Bool  bool
-	Valid bool // Valid is true if Bool is not NULL
-}
-
-func (v NullBool) String() string {
-	if !v.Valid {
-		return ""
-	}
-	return strconv.FormatBool(v.Bool)
-}
diff --git a/internal/metrics/writecache.go b/internal/metrics/writecache.go
index 1b708f710..a95c1f152 100644
--- a/internal/metrics/writecache.go
+++ b/internal/metrics/writecache.go
@@ -13,7 +13,7 @@ type WriteCacheMetrics interface {
 	SetActualCount(shardID, path, storageType string, count uint64)
 	SetEstimateSize(shardID, path, storageType string, size uint64)
 	SetMode(shardID, mode string)
-	IncOperationCounter(shardID, path, storageType, operation string, success NullBool)
+	IncOperationCounter(shardID, path, storageType, operation string, success string)
 	Close(shardID, path string)
 }
 
@@ -80,12 +80,12 @@ func (m *writeCacheMetrics) SetMode(shardID string, mode string) {
 	m.mode.SetMode(shardID, mode)
 }
 
-func (m *writeCacheMetrics) IncOperationCounter(shardID, path, storageType, operation string, success NullBool) {
+func (m *writeCacheMetrics) IncOperationCounter(shardID, path, storageType, operation string, success string) {
 	m.operationCounter.With(prometheus.Labels{
 		shardIDLabel:   shardID,
 		storageLabel:   storageType,
 		operationLabel: operation,
-		successLabel:   success.String(),
+		successLabel:   success,
 		pathLabel:      path,
 	}).Inc()
 }
diff --git a/pkg/local_object_storage/engine/container.go b/pkg/local_object_storage/engine/container.go
index 24059a3f9..05b8513d7 100644
--- a/pkg/local_object_storage/engine/container.go
+++ b/pkg/local_object_storage/engine/container.go
@@ -45,7 +45,7 @@ func (r ListContainersRes) Containers() []cid.ID {
 //
 // Returns an error if executions are blocked (see BlockExecution).
 func (e *StorageEngine) ContainerSize(ctx context.Context, prm ContainerSizePrm) (res ContainerSizeRes, err error) {
-	defer elapsed("ContainerSize", e.metrics.AddMethodDuration)()
+	defer elapsed("ContainerSize", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.containerSize(ctx, prm)
@@ -93,7 +93,7 @@ func (e *StorageEngine) containerSize(ctx context.Context, prm ContainerSizePrm)
 //
 // Returns an error if executions are blocked (see BlockExecution).
 func (e *StorageEngine) ListContainers(ctx context.Context, _ ListContainersPrm) (res ListContainersRes, err error) {
-	defer elapsed("ListContainers", e.metrics.AddMethodDuration)()
+	defer elapsed("ListContainers", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.listContainers(ctx)
diff --git a/pkg/local_object_storage/engine/delete.go b/pkg/local_object_storage/engine/delete.go
index 7164ff21f..fce51cd2b 100644
--- a/pkg/local_object_storage/engine/delete.go
+++ b/pkg/local_object_storage/engine/delete.go
@@ -58,7 +58,7 @@ func (e *StorageEngine) Delete(ctx context.Context, prm DeletePrm) (res DeleteRe
 			attribute.Bool("force_removal", prm.forceRemoval),
 		))
 	defer span.End()
-	defer elapsed("Delete", e.metrics.AddMethodDuration)()
+	defer elapsed("Delete", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.delete(ctx, prm)
diff --git a/pkg/local_object_storage/engine/engine.go b/pkg/local_object_storage/engine/engine.go
index 029904046..248edbd3f 100644
--- a/pkg/local_object_storage/engine/engine.go
+++ b/pkg/local_object_storage/engine/engine.go
@@ -145,7 +145,7 @@ func (e *StorageEngine) reportShardError(
 	}
 
 	errCount := sh.errorCount.Add(1)
-	e.metrics.IncErrorCounter(sh.ID().String())
+	e.engineMetrics.IncErrorCounter(sh.ID().String())
 
 	sid := sh.ID()
 	e.log.Warn(ctx, msg, append([]zap.Field{
@@ -187,7 +187,9 @@ type cfg struct {
 
 	errorsThreshold uint32
 
-	metrics MetricRegister
+	engineMetrics     EngineMetrics
+	writeCacheMetrics WriteCacheMetrics
+	gcMetrics         GCMetrics
 
 	shardPoolSize uint32
 
@@ -200,7 +202,10 @@ func defaultCfg() *cfg {
 	res := &cfg{
 		log:           logger.NewLoggerWrapper(zap.L()),
 		shardPoolSize: 20,
-		metrics:       noopMetrics{},
+
+		engineMetrics:     noopMetrics{},
+		writeCacheMetrics: noopWriteCacheMetrics{},
+		gcMetrics:         noopGCMetrics{},
 	}
 	res.containerSource.Store(&containerSource{})
 	return res
@@ -231,9 +236,21 @@ func WithLogger(l *logger.Logger) Option {
 	}
 }
 
-func WithMetrics(v MetricRegister) Option {
+func WithEngineMetrics(v EngineMetrics) Option {
 	return func(c *cfg) {
-		c.metrics = v
+		c.engineMetrics = v
+	}
+}
+
+func WithWritecacheMetrics(v WriteCacheMetrics) Option {
+	return func(c *cfg) {
+		c.writeCacheMetrics = v
+	}
+}
+
+func WithGCMetrics(v GCMetrics) Option {
+	return func(c *cfg) {
+		c.gcMetrics = v
 	}
 }
 
diff --git a/pkg/local_object_storage/engine/get.go b/pkg/local_object_storage/engine/get.go
index c7145889b..d4bc7cfef 100644
--- a/pkg/local_object_storage/engine/get.go
+++ b/pkg/local_object_storage/engine/get.go
@@ -56,7 +56,7 @@ func (e *StorageEngine) Get(ctx context.Context, prm GetPrm) (res GetRes, err er
 			attribute.String("address", prm.addr.EncodeToString()),
 		))
 	defer span.End()
-	defer elapsed("Get", e.metrics.AddMethodDuration)()
+	defer elapsed("Get", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.get(ctx, prm)
diff --git a/pkg/local_object_storage/engine/head.go b/pkg/local_object_storage/engine/head.go
index d6892f129..80f969bbe 100644
--- a/pkg/local_object_storage/engine/head.go
+++ b/pkg/local_object_storage/engine/head.go
@@ -68,7 +68,7 @@ func (e *StorageEngine) Head(ctx context.Context, prm HeadPrm) (res HeadRes, err
 func (e *StorageEngine) head(ctx context.Context, prm HeadPrm) (HeadRes, error) {
 	ctx, span := tracing.StartSpanFromContext(ctx, "StorageEngine.head")
 	defer span.End()
-	defer elapsed("Head", e.metrics.AddMethodDuration)()
+	defer elapsed("Head", e.engineMetrics.AddMethodDuration)()
 
 	var (
 		head     *objectSDK.Object
diff --git a/pkg/local_object_storage/engine/inhume.go b/pkg/local_object_storage/engine/inhume.go
index e89a8d048..56f2caef3 100644
--- a/pkg/local_object_storage/engine/inhume.go
+++ b/pkg/local_object_storage/engine/inhume.go
@@ -70,7 +70,7 @@ var errInhumeFailure = errors.New("inhume operation failed")
 func (e *StorageEngine) Inhume(ctx context.Context, prm InhumePrm) (res InhumeRes, err error) {
 	ctx, span := tracing.StartSpanFromContext(ctx, "StorageEngine.Inhume")
 	defer span.End()
-	defer elapsed("Inhume", e.metrics.AddMethodDuration)()
+	defer elapsed("Inhume", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.inhume(ctx, prm)
@@ -360,7 +360,7 @@ func (e *StorageEngine) processZeroSizeContainers(ctx context.Context, ids []cid
 	}
 
 	for id := range idMap {
-		e.metrics.DeleteContainerSize(id.EncodeToString())
+		e.engineMetrics.DeleteContainerSize(id.EncodeToString())
 	}
 }
 
@@ -438,7 +438,7 @@ func (e *StorageEngine) processZeroCountContainers(ctx context.Context, ids []ci
 	}
 
 	for id := range idMap {
-		e.metrics.DeleteContainerCount(id.EncodeToString())
+		e.engineMetrics.DeleteContainerCount(id.EncodeToString())
 	}
 }
 
diff --git a/pkg/local_object_storage/engine/list.go b/pkg/local_object_storage/engine/list.go
index 073248862..ff6010efd 100644
--- a/pkg/local_object_storage/engine/list.go
+++ b/pkg/local_object_storage/engine/list.go
@@ -101,7 +101,7 @@ func (l ListWithCursorRes) Cursor() *Cursor {
 func (e *StorageEngine) ListWithCursor(ctx context.Context, prm ListWithCursorPrm) (ListWithCursorRes, error) {
 	ctx, span := tracing.StartSpanFromContext(ctx, "StorageEngine.ListWithCursor")
 	defer span.End()
-	defer elapsed("ListWithCursor", e.metrics.AddMethodDuration)()
+	defer elapsed("ListWithCursor", e.engineMetrics.AddMethodDuration)()
 
 	result := make([]objectcore.Info, 0, prm.count)
 
diff --git a/pkg/local_object_storage/engine/lock.go b/pkg/local_object_storage/engine/lock.go
index 5d43e59df..4e8c65a7c 100644
--- a/pkg/local_object_storage/engine/lock.go
+++ b/pkg/local_object_storage/engine/lock.go
@@ -32,7 +32,7 @@ func (e *StorageEngine) Lock(ctx context.Context, idCnr cid.ID, locker oid.ID, l
 			attribute.Int("locked_count", len(locked)),
 		))
 	defer span.End()
-	defer elapsed("Lock", e.metrics.AddMethodDuration)()
+	defer elapsed("Lock", e.engineMetrics.AddMethodDuration)()
 
 	return e.execIfNotBlocked(func() error {
 		return e.lock(ctx, idCnr, locker, locked)
diff --git a/pkg/local_object_storage/engine/metrics.go b/pkg/local_object_storage/engine/metrics.go
index 75936206d..7754808ac 100644
--- a/pkg/local_object_storage/engine/metrics.go
+++ b/pkg/local_object_storage/engine/metrics.go
@@ -7,7 +7,23 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
 )
 
-type MetricRegister interface {
+type WriteCacheMetrics interface {
+	AddMethodDuration(shardID, path, storageType, method string, success bool, d time.Duration)
+	SetActualCount(shardID, path, storageType string, count uint64)
+	SetEstimateSize(shardID, path, storageType string, size uint64)
+	SetMode(shardID, mode string)
+	IncOperationCounter(shardID, path, storageType, operation string, success string)
+	Close(shardID, path string)
+}
+
+type GCMetrics interface {
+	AddRunDuration(shardID string, d time.Duration, success bool)
+	AddDeletedCount(shardID string, deleted, failed uint64)
+	AddExpiredObjectCollectionDuration(shardID string, d time.Duration, success bool, objectType string)
+	AddInhumedObjectCount(shardID string, count uint64, objectType string)
+}
+
+type EngineMetrics interface {
 	AddMethodDuration(method string, d time.Duration)
 
 	SetObjectCounter(shardID, objectType string, v uint64)
@@ -31,9 +47,6 @@ type MetricRegister interface {
 	SetRefillPercent(shardID, path string, percent uint32)
 	SetRefillStatus(shardID, path, status string)
 	SetEvacuationInProgress(shardID string, value bool)
-
-	WriteCache() metrics.WriteCacheMetrics
-	GC() metrics.GCMetrics
 }
 
 func elapsed(method string, addFunc func(method string, d time.Duration)) func() {
@@ -76,9 +89,9 @@ type (
 )
 
 var (
-	_ MetricRegister            = noopMetrics{}
-	_ metrics.WriteCacheMetrics = noopWriteCacheMetrics{}
-	_ metrics.GCMetrics         = noopGCMetrics{}
+	_ EngineMetrics     = noopMetrics{}
+	_ WriteCacheMetrics = noopWriteCacheMetrics{}
+	_ GCMetrics         = noopGCMetrics{}
 )
 
 func (noopMetrics) AddMethodDuration(string, time.Duration)                  {}
@@ -99,14 +112,12 @@ func (noopMetrics) IncRefillObjectsCount(string, string, int, bool)          {}
 func (noopMetrics) SetRefillPercent(string, string, uint32)                  {}
 func (noopMetrics) SetRefillStatus(string, string, string)                   {}
 func (noopMetrics) SetEvacuationInProgress(string, bool)                     {}
-func (noopMetrics) WriteCache() metrics.WriteCacheMetrics                    { return noopWriteCacheMetrics{} }
-func (noopMetrics) GC() metrics.GCMetrics                                    { return noopGCMetrics{} }
 
 func (noopWriteCacheMetrics) AddMethodDuration(string, string, string, string, bool, time.Duration) {}
 func (noopWriteCacheMetrics) SetActualCount(string, string, string, uint64)                         {}
 func (noopWriteCacheMetrics) SetEstimateSize(string, string, string, uint64)                        {}
 func (noopWriteCacheMetrics) SetMode(string, string)                                                {}
-func (noopWriteCacheMetrics) IncOperationCounter(string, string, string, string, metrics.NullBool)  {}
+func (noopWriteCacheMetrics) IncOperationCounter(string, string, string, string, string)            {}
 func (noopWriteCacheMetrics) Close(string, string)                                                  {}
 
 func (noopGCMetrics) AddRunDuration(string, time.Duration, bool)                             {}
diff --git a/pkg/local_object_storage/engine/put.go b/pkg/local_object_storage/engine/put.go
index e080191ae..10d949f09 100644
--- a/pkg/local_object_storage/engine/put.go
+++ b/pkg/local_object_storage/engine/put.go
@@ -56,7 +56,7 @@ func (e *StorageEngine) Put(ctx context.Context, prm PutPrm) (err error) {
 			attribute.String("address", object.AddressOf(prm.Object).EncodeToString()),
 		))
 	defer span.End()
-	defer elapsed("Put", e.metrics.AddMethodDuration)()
+	defer elapsed("Put", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		err = e.put(ctx, prm)
diff --git a/pkg/local_object_storage/engine/range.go b/pkg/local_object_storage/engine/range.go
index 0c9cea903..cac6a6971 100644
--- a/pkg/local_object_storage/engine/range.go
+++ b/pkg/local_object_storage/engine/range.go
@@ -72,7 +72,7 @@ func (e *StorageEngine) GetRange(ctx context.Context, prm RngPrm) (res RngRes, e
 			attribute.String("length", strconv.FormatUint(prm.ln, 10)),
 		))
 	defer span.End()
-	defer elapsed("GetRange", e.metrics.AddMethodDuration)()
+	defer elapsed("GetRange", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.getRange(ctx, prm)
diff --git a/pkg/local_object_storage/engine/select.go b/pkg/local_object_storage/engine/select.go
index 02149b4c8..8074d3363 100644
--- a/pkg/local_object_storage/engine/select.go
+++ b/pkg/local_object_storage/engine/select.go
@@ -51,7 +51,7 @@ func (e *StorageEngine) Select(ctx context.Context, prm SelectPrm) (res SelectRe
 			attribute.String("container_id", prm.cnr.EncodeToString()),
 		))
 	defer span.End()
-	defer elapsed("Select", e.metrics.AddMethodDuration)()
+	defer elapsed("Select", e.engineMetrics.AddMethodDuration)()
 
 	err = e.execIfNotBlocked(func() error {
 		res, err = e._select(ctx, prm)
@@ -98,7 +98,7 @@ func (e *StorageEngine) _select(ctx context.Context, prm SelectPrm) (SelectRes,
 //
 // Returns an error if executions are blocked (see BlockExecution).
 func (e *StorageEngine) List(ctx context.Context, limit uint64) (res SelectRes, err error) {
-	defer elapsed("List", e.metrics.AddMethodDuration)()
+	defer elapsed("List", e.engineMetrics.AddMethodDuration)()
 	err = e.execIfNotBlocked(func() error {
 		res, err = e.list(ctx, limit)
 		return err
diff --git a/pkg/local_object_storage/engine/shards.go b/pkg/local_object_storage/engine/shards.go
index 898f685ec..8dff217a3 100644
--- a/pkg/local_object_storage/engine/shards.go
+++ b/pkg/local_object_storage/engine/shards.go
@@ -28,7 +28,7 @@ type hashedShard struct {
 
 type metricsWithID struct {
 	id string
-	mw MetricRegister
+	mw EngineMetrics
 }
 
 func (m *metricsWithID) SetShardID(id string) {
@@ -116,7 +116,7 @@ func (e *StorageEngine) AddShard(ctx context.Context, opts ...shard.Option) (*sh
 		return nil, fmt.Errorf("could not add %s shard: %w", sh.ID().String(), err)
 	}
 
-	e.cfg.metrics.SetMode(sh.ID().String(), sh.GetMode())
+	e.cfg.engineMetrics.SetMode(sh.ID().String(), sh.GetMode())
 
 	return sh.ID(), nil
 }
@@ -154,18 +154,18 @@ func (e *StorageEngine) appendMetrics(id *shard.ID, opts []shard.Option) []shard
 		shard.WithMetricsWriter(
 			&metricsWithID{
 				id: id.String(),
-				mw: e.metrics,
+				mw: e.engineMetrics,
 			},
 		),
 		shard.WithWriteCacheMetrics(
 			&writeCacheMetrics{
 				shardID: id.String(),
-				metrics: e.metrics.WriteCache(),
+				metrics: e.writeCacheMetrics,
 			},
 		),
 		shard.WithGCMetrics(
 			&gcMetrics{
-				storage: e.metrics.GC(),
+				storage: e.gcMetrics,
 				shardID: id.String(),
 			},
 		),
@@ -217,7 +217,7 @@ func (e *StorageEngine) removeShards(ctx context.Context, ids ...string) {
 			continue
 		}
 
-		e.metrics.DeleteShardMetrics(id)
+		e.engineMetrics.DeleteShardMetrics(id)
 
 		ss = append(ss, sh)
 		delete(e.shards, id)
@@ -318,7 +318,7 @@ func (e *StorageEngine) SetShardMode(ctx context.Context, id *shard.ID, m mode.M
 		if id.String() == shID {
 			if resetErrorCounter {
 				sh.errorCount.Store(0)
-				e.metrics.ClearErrorCounter(shID)
+				e.engineMetrics.ClearErrorCounter(shID)
 			}
 			return sh.SetMode(ctx, m)
 		}
@@ -422,7 +422,7 @@ func (e *StorageEngine) deleteShards(ctx context.Context, ids []*shard.ID) ([]ha
 	for _, sh := range ss {
 		idStr := sh.ID().String()
 
-		e.metrics.DeleteShardMetrics(idStr)
+		e.engineMetrics.DeleteShardMetrics(idStr)
 
 		delete(e.shards, idStr)
 
diff --git a/pkg/local_object_storage/engine/writecache.go b/pkg/local_object_storage/engine/writecache.go
index e9ba3410f..4caf48ab7 100644
--- a/pkg/local_object_storage/engine/writecache.go
+++ b/pkg/local_object_storage/engine/writecache.go
@@ -2,6 +2,7 @@ package engine
 
 import (
 	"context"
+	"strconv"
 	"sync"
 	"time"
 
@@ -182,11 +183,11 @@ func (m *writeCacheMetrics) SetActualCounters(count uint64) {
 }
 
 func (m *writeCacheMetrics) Flush(success bool, st writecache.StorageType) {
-	m.metrics.IncOperationCounter(m.shardID, m.path, st.String(), "Flush", metrics.NullBool{Bool: success, Valid: true})
+	m.metrics.IncOperationCounter(m.shardID, m.path, st.String(), "Flush", strconv.FormatBool(success))
 }
 
 func (m *writeCacheMetrics) Evict(st writecache.StorageType) {
-	m.metrics.IncOperationCounter(m.shardID, m.path, st.String(), "Evict", metrics.NullBool{})
+	m.metrics.IncOperationCounter(m.shardID, m.path, st.String(), "Evict", "")
 }
 
 func (m *writeCacheMetrics) Close() {
diff --git a/pkg/local_object_storage/metrics/blobovnicza.go b/pkg/local_object_storage/metrics/blobovnicza.go
index 460d6e638..475d72005 100644
--- a/pkg/local_object_storage/metrics/blobovnicza.go
+++ b/pkg/local_object_storage/metrics/blobovnicza.go
@@ -1,6 +1,7 @@
 package metrics
 
 import (
+	"strconv"
 	"time"
 
 	metrics_impl "git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
@@ -56,40 +57,40 @@ func (m *blobovniczaTreeMetrics) ObjectMoved(d time.Duration) {
 }
 
 func (m *blobovniczaTreeMetrics) Delete(d time.Duration, success, withStorageID bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Delete", d, success, metrics_impl.NullBool{Valid: true, Bool: withStorageID})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Delete", d, success, strconv.FormatBool(withStorageID))
 }
 
 func (m *blobovniczaTreeMetrics) Exists(d time.Duration, success, withStorageID bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Exists", d, success, metrics_impl.NullBool{Valid: true, Bool: withStorageID})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Exists", d, success, strconv.FormatBool(withStorageID))
 }
 
 func (m *blobovniczaTreeMetrics) GetRange(d time.Duration, size int, success, withStorageID bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "GetRange", d, success, metrics_impl.NullBool{Valid: true, Bool: withStorageID})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "GetRange", d, success, strconv.FormatBool(withStorageID))
 	if success {
 		m.m.AddBlobobvnizcaTreeGet(m.shardID, m.path, size)
 	}
 }
 
 func (m *blobovniczaTreeMetrics) Get(d time.Duration, size int, success, withStorageID bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Get", d, success, metrics_impl.NullBool{Valid: true, Bool: withStorageID})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Get", d, success, strconv.FormatBool(withStorageID))
 	if success {
 		m.m.AddBlobobvnizcaTreeGet(m.shardID, m.path, size)
 	}
 }
 
 func (m *blobovniczaTreeMetrics) Iterate(d time.Duration, success bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Iterate", d, success, metrics_impl.NullBool{})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Iterate", d, success, "")
 }
 
 func (m *blobovniczaTreeMetrics) Put(d time.Duration, size int, success bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Put", d, success, metrics_impl.NullBool{})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "Put", d, success, "")
 	if success {
 		m.m.AddBlobobvnizcaTreePut(m.shardID, m.path, size)
 	}
 }
 
 func (m *blobovniczaTreeMetrics) ObjectsCount(d time.Duration, success bool) {
-	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "ObjectsCount", d, success, metrics_impl.NullBool{})
+	m.m.BlobobvnizcaTreeMethodDuration(m.shardID, m.path, "ObjectsCount", d, success, "")
 }
 
 type blobovniczaMetrics struct {
diff --git a/pkg/local_object_storage/metrics/blobstore.go b/pkg/local_object_storage/metrics/blobstore.go
index 9a41f01d0..0969bf42e 100644
--- a/pkg/local_object_storage/metrics/blobstore.go
+++ b/pkg/local_object_storage/metrics/blobstore.go
@@ -1,6 +1,7 @@
 package metrics
 
 import (
+	"strconv"
 	"time"
 
 	metrics_impl "git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
@@ -32,38 +33,38 @@ func (m *blobstoreMetrics) Close() {
 }
 
 func (m *blobstoreMetrics) Delete(d time.Duration, success, withStorageID bool) {
-	m.m.MethodDuration(m.shardID, "Delete", d, success, metrics_impl.NullBool{Bool: withStorageID, Valid: true})
+	m.m.MethodDuration(m.shardID, "Delete", d, success, strconv.FormatBool(withStorageID))
 }
 
 func (m *blobstoreMetrics) Exists(d time.Duration, success, withStorageID bool) {
-	m.m.MethodDuration(m.shardID, "Exists", d, success, metrics_impl.NullBool{Bool: withStorageID, Valid: true})
+	m.m.MethodDuration(m.shardID, "Exists", d, success, strconv.FormatBool(withStorageID))
 }
 
 func (m *blobstoreMetrics) GetRange(d time.Duration, size int, success, withStorageID bool) {
-	m.m.MethodDuration(m.shardID, "GetRange", d, success, metrics_impl.NullBool{Bool: withStorageID, Valid: true})
+	m.m.MethodDuration(m.shardID, "GetRange", d, success, strconv.FormatBool(withStorageID))
 	if success {
 		m.m.AddGet(m.shardID, size)
 	}
 }
 
 func (m *blobstoreMetrics) Get(d time.Duration, size int, success, withStorageID bool) {
-	m.m.MethodDuration(m.shardID, "Get", d, success, metrics_impl.NullBool{Bool: withStorageID, Valid: true})
+	m.m.MethodDuration(m.shardID, "Get", d, success, strconv.FormatBool(withStorageID))
 	if success {
 		m.m.AddGet(m.shardID, size)
 	}
 }
 
 func (m *blobstoreMetrics) Iterate(d time.Duration, success bool) {
-	m.m.MethodDuration(m.shardID, "Iterate", d, success, metrics_impl.NullBool{})
+	m.m.MethodDuration(m.shardID, "Iterate", d, success, "")
 }
 
 func (m *blobstoreMetrics) Put(d time.Duration, size int, success bool) {
-	m.m.MethodDuration(m.shardID, "Put", d, success, metrics_impl.NullBool{})
+	m.m.MethodDuration(m.shardID, "Put", d, success, "")
 	if success {
 		m.m.AddPut(m.shardID, size)
 	}
 }
 
 func (m *blobstoreMetrics) ObjectsCount(d time.Duration, success bool) {
-	m.m.MethodDuration(m.shardID, "ObjectsCount", d, success, metrics_impl.NullBool{})
+	m.m.MethodDuration(m.shardID, "ObjectsCount", d, success, "")
 }