diff --git a/internal/logs/logs.go b/internal/logs/logs.go
index d0bac4d11..7e8bf5926 100644
--- a/internal/logs/logs.go
+++ b/internal/logs/logs.go
@@ -518,6 +518,5 @@ const (
 	FailedToSealWritecacheAsync                                          = "failed to seal writecache async"
 	WritecacheShrinkSkippedNotEmpty                                      = "writecache shrink skipped: not empty"
 	BlobovniczatreeFailedToRemoveRebuildTempFile                         = "failed to remove rebuild temp file"
-	WritecacheCantGetObject                                              = "can't get an object from fstree"
 	FailedToUpdateMultinetConfiguration                                  = "failed to update multinet configuration"
 )
diff --git a/pkg/local_object_storage/writecache/cache.go b/pkg/local_object_storage/writecache/cache.go
index ea4e7b5d3..1e11d2ec3 100644
--- a/pkg/local_object_storage/writecache/cache.go
+++ b/pkg/local_object_storage/writecache/cache.go
@@ -10,7 +10,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	"go.etcd.io/bbolt"
 	"go.uber.org/zap"
 )
@@ -37,8 +37,9 @@ type cache struct {
 const wcStorageType = "write-cache"
 
 type objectInfo struct {
-	addr oid.Address
-	size uint64
+	addr string
+	data []byte
+	obj  *objectSDK.Object
 }
 
 const (
diff --git a/pkg/local_object_storage/writecache/flush.go b/pkg/local_object_storage/writecache/flush.go
index 6f1300c06..094c6486d 100644
--- a/pkg/local_object_storage/writecache/flush.go
+++ b/pkg/local_object_storage/writecache/flush.go
@@ -13,12 +13,10 @@ import (
 	objectCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
 	meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
-	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.etcd.io/bbolt"
@@ -31,7 +29,7 @@ const (
 	// defaultFlushWorkersCount is number of workers for putting objects in main storage.
 	defaultFlushWorkersCount = 20
 	// defaultFlushInterval is default time interval between successive flushes.
-	defaultFlushInterval = 10 * time.Second
+	defaultFlushInterval = time.Second
 )
 
 var errIterationCompleted = errors.New("iteration completed")
@@ -43,41 +41,23 @@ func (c *cache) runFlushLoop(ctx context.Context) {
 	}
 	c.wg.Add(1)
 	go func() {
-		defer c.wg.Done()
-		c.pushToFlushQueue(ctx)
+		c.workerFlushBig(ctx)
+		c.wg.Done()
 	}()
-
-	for range c.workersCount {
-		c.wg.Add(1)
-		go c.workerFlush(ctx)
-	}
 }
 
-func (c *cache) pushToFlushQueue(ctx context.Context) {
-	tick := time.NewTicker(defaultFlushInterval)
+func (c *cache) workerFlushBig(ctx context.Context) {
+	tick := time.NewTicker(defaultFlushInterval * 10)
 	for {
 		select {
 		case <-tick.C:
 			c.modeMtx.RLock()
 			if c.readOnly() || c.noMetabase() {
 				c.modeMtx.RUnlock()
-				continue
+				break
 			}
 
-			err := c.fsTree.IterateInfo(ctx, func(oi fstree.ObjectInfo) error {
-				select {
-				case c.flushCh <- objectInfo{
-					addr: oi.Address,
-					size: oi.DataSize,
-				}:
-					return nil
-				case <-ctx.Done():
-					return ctx.Err()
-				}
-			})
-			if err != nil {
-				c.log.Warn(ctx, logs.BlobstorErrorOccurredDuringTheIteration, zap.Error(err))
-			}
+			_ = c.flushFSTree(ctx, true)
 
 			c.modeMtx.RUnlock()
 		case <-ctx.Done():
@@ -86,37 +66,6 @@ func (c *cache) pushToFlushQueue(ctx context.Context) {
 	}
 }
 
-func (c *cache) workerFlush(ctx context.Context) {
-	defer c.wg.Done()
-
-	var objInfo objectInfo
-	for {
-		select {
-		case objInfo = <-c.flushCh:
-		case <-ctx.Done():
-			return
-		}
-
-		res, err := c.fsTree.Get(ctx, common.GetPrm{
-			Address: objInfo.addr,
-		})
-		if err != nil {
-			if !errors.As(err, new(*apistatus.ObjectNotFound)) {
-				c.reportFlushError(ctx, logs.WritecacheCantGetObject, objInfo.addr.EncodeToString(), metaerr.Wrap(err))
-			}
-			continue
-		}
-
-		err = c.flushObject(ctx, res.Object, res.RawData, StorageTypeFSTree)
-		if err != nil {
-			// Error is handled in flushObject.
-			continue
-		}
-
-		c.deleteFromDisk(ctx, objInfo.addr)
-	}
-}
-
 func (c *cache) reportFlushError(ctx context.Context, msg string, addr string, err error) {
 	if c.reportError != nil {
 		c.reportError(ctx, msg, err)