diff --git a/cmd/neofs-node/config/engine/shard/writecache/config.go b/cmd/neofs-node/config/engine/shard/writecache/config.go
index b782b9704..151d4880a 100644
--- a/cmd/neofs-node/config/engine/shard/writecache/config.go
+++ b/cmd/neofs-node/config/engine/shard/writecache/config.go
@@ -47,13 +47,13 @@ func (x *Config) Path() string {
 	return p
 }
 
-// MemSize returns value of "mem_size" config parameter.
+// MemSize returns value of "memcache_capacity" config parameter.
 //
 // Returns MemSizeDefault if value is not a positive number.
 func (x *Config) MemSize() uint64 {
 	s := config.SizeInBytesSafe(
 		(*config.Config)(x),
-		"mem_size",
+		"memcache_capacity",
 	)
 
 	if s > 0 {
diff --git a/config/example/node.env b/config/example/node.env
index 98b9594db..f6cf81c1b 100644
--- a/config/example/node.env
+++ b/config/example/node.env
@@ -73,7 +73,7 @@ NEOFS_STORAGE_SHARD_0_RESYNC_METABASE=false
 ### Write cache config
 NEOFS_STORAGE_SHARD_0_USE_WRITE_CACHE=false
 NEOFS_STORAGE_SHARD_0_WRITECACHE_PATH=tmp/0/cache
-NEOFS_STORAGE_SHARD_0_WRITECACHE_MEM_SIZE=2147483648
+NEOFS_STORAGE_SHARD_0_WRITECACHE_MEMCACHE_CAPACITY=2147483648
 NEOFS_STORAGE_SHARD_0_WRITECACHE_SMALL_OBJECT_SIZE=16384
 NEOFS_STORAGE_SHARD_0_WRITECACHE_MAX_OBJECT_SIZE=134217728
 NEOFS_STORAGE_SHARD_0_WRITECACHE_WORKERS_NUMBER=30
@@ -104,7 +104,7 @@ NEOFS_STORAGE_SHARD_1_RESYNC_METABASE=true
 ### Write cache config
 NEOFS_STORAGE_SHARD_1_USE_WRITE_CACHE=true
 NEOFS_STORAGE_SHARD_1_WRITECACHE_PATH=tmp/1/cache
-NEOFS_STORAGE_SHARD_1_WRITECACHE_MEM_SIZE=2147483648
+NEOFS_STORAGE_SHARD_1_WRITECACHE_MEMCACHE_CAPACITY=2147483648
 NEOFS_STORAGE_SHARD_1_WRITECACHE_SMALL_OBJECT_SIZE=16384
 NEOFS_STORAGE_SHARD_1_WRITECACHE_MAX_OBJECT_SIZE=134217728
 NEOFS_STORAGE_SHARD_1_WRITECACHE_WORKERS_NUMBER=30
diff --git a/config/example/node.json b/config/example/node.json
index 86ec7601e..57739a646 100644
--- a/config/example/node.json
+++ b/config/example/node.json
@@ -105,7 +105,7 @@
         "use_write_cache": false,
         "writecache": {
           "path": "tmp/0/cache",
-          "mem_size": 2147483648,
+          "memcache_capacity": 2147483648,
           "small_object_size": 16384,
           "max_object_size": 134217728,
           "workers_number": 30,
@@ -138,7 +138,7 @@
         "use_write_cache": true,
         "writecache": {
           "path": "tmp/1/cache",
-          "mem_size": 2147483648,
+          "memcache_capacity": 2147483648,
           "small_object_size": 16384,
           "max_object_size": 134217728,
           "workers_number": 30,
diff --git a/config/example/node.yaml b/config/example/node.yaml
index 366df83dd..c980fd597 100644
--- a/config/example/node.yaml
+++ b/config/example/node.yaml
@@ -93,7 +93,7 @@ storage:
     use_write_cache: true  # use write-cache
 
     writecache:
-      mem_size: 2147483648  # approximate RAM usage limit for "small" objects, bytes
+      memcache_capacity: 2147483648  # approximate RAM usage limit for "small" objects, bytes
       small_object_size: 16384  # size threshold for "small" objects which are cached in key-value DB, not in FS, bytes
       max_object_size: 134217728  # size threshold for "big" objects which bypass write-cache and go to the storage directly, bytes
       workers_number: 30  # number of write-cache flusher threads