Fix batch_size for vectordb (#1449)

embedchain/config/vectordb/opensearch.py

@@ -13,6 +13,7 @@ class OpenSearchDBConfig(BaseVectorDbConfig):
         vector_dimension: int = 1536,
         collection_name: Optional[str] = None,
         dir: Optional[str] = None,
+        batch_size: Optional[int] = 100,
         **extra_params: dict[str, any],
     ):
         """
@@ -28,10 +29,13 @@ class OpenSearchDBConfig(BaseVectorDbConfig):
         :type vector_dimension: int, optional
         :param dir: Path to the database directory, where the database is stored, defaults to None
         :type dir: Optional[str], optional
+        :param batch_size: Number of items to insert in one batch, defaults to 100
+        :type batch_size: Optional[int], optional
         """
         self.opensearch_url = opensearch_url
         self.http_auth = http_auth
         self.vector_dimension = vector_dimension
         self.extra_params = extra_params
+        self.batch_size = batch_size
 
         super().__init__(collection_name=collection_name, dir=dir)