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‎docarray/array/storage/redis/backend.py‎
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‎docs/advanced/document-store/redis.md‎
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‎docs/advanced/document-store/redis.md‎
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@@ -5,7 +5,7 @@
 import numpy as np
 from docarray import Document
 from docarray.array.storage.base.backend import BaseBackendMixin, TypeMap
-from docarray.helper import dataclass_from_dict, random_identity
+from docarray.helper import dataclass_from_dict, random_identity, filter_dict
 
 from redis import Redis
 from redis.commands.search.field import NumericField, TextField, VectorField
@@ -28,10 +28,10 @@ class RedisConfig:
     tag_indices: List[str] = field(default_factory=list)
     batch_size: int = field(default=64)
     method: str = field(default='HNSW')
-    ef_construction: int = field(default=200)
-    m: int = field(default=16)
-    ef_runtime: int = field(default=10)
-    block_size: int = field(default=1048576)
+    ef_construction: Optional[int] = None
+    m: Optional[int] = None
+    ef_runtime: Optional[int] = None
+    block_size: Optional[int] = None
     initial_cap: Optional[int] = None
     columns: Optional[Union[List[Tuple[str, str]], Dict[str, str]]] = None
 
@@ -137,11 +137,11 @@ def _build_schema_from_redis_config(self):
                 'EF_CONSTRUCTION': self._config.ef_construction,
                 'EF_RUNTIME': self._config.ef_runtime,
             }
-            index_param.update(index_options)
+            index_param.update(filter_dict(index_options))
 
         if self._config.method == 'FLAT':
             index_options = {'BLOCK_SIZE': self._config.block_size}
-            index_param.update(index_options)
+            index_param.update(filter_dict(index_options))
 
         if self._config.initial_cap:
             index_param['INITIAL_CAP'] = self._config.initial_cap
 
@@ -492,7 +492,7 @@ The following configs can be set:
 | `columns`         | Other fields to store in Document and build schema                                                | `None`                                            |
 
 You can check the default values in [the docarray source code](https://github.com/jina-ai/docarray/blob/main/docarray/array/storage/redis/backend.py)
-
+For vector search configurations, default values are those of the database backend, you can find them in [redis documentation](https://redis.io/docs/stack/search/reference/vectors/)
 
 ```{note}
 We will support geo-filtering soon.