diff --git a/packages/google-cloud-bigtable/google/cloud/bigtable/data/_async/_accelerator_client.py b/packages/google-cloud-bigtable/google/cloud/bigtable/data/_async/_accelerator_client.py
index e6c2dd9db41c..8b168c232b53 100644
--- a/packages/google-cloud-bigtable/google/cloud/bigtable/data/_async/_accelerator_client.py
+++ b/packages/google-cloud-bigtable/google/cloud/bigtable/data/_async/_accelerator_client.py
@@ -46,6 +46,16 @@
 _MUTATE_ROW_METHOD = "/google.bigtable.v2.Bigtable/MutateRow"
 _READ_ROWS_METHOD = "/google.bigtable.v2.Bigtable/ReadRows"
 
+# Inbound message cap on the UDS channel. gRPC defaults this to 4 MiB, a limit
+# meant for a channel that crosses a network. This one doesn't leave the
+# machine: the daemon has already paid the cost of pulling the response off the
+# wire, and all the cap does on this hop is turn an otherwise-fine read into
+# RESOURCE_EXHAUSTED. Raise it well past anything the service itself produces so
+# the UDS leg is never the narrower of the two.
+_MAX_RECEIVE_MESSAGE_LENGTH = 256 * 1024 * 1024
+
+_CHANNEL_OPTIONS = (("grpc.max_receive_message_length", _MAX_RECEIVE_MESSAGE_LENGTH),)
+
 
 @CrossSync.convert_class(sync_name="_AcceleratorClient")
 class _AsyncAcceleratorClient:
@@ -59,7 +69,9 @@ class _AsyncAcceleratorClient:
     def __init__(self, uds_path: str, auth_secret: str):
         self._uds_path = uds_path
         self._metadata = (("x-accelerator-token", auth_secret),)
-        self._channel = insecure_channel(_uds_target(uds_path))
+        self._channel = insecure_channel(
+            _uds_target(uds_path), options=_CHANNEL_OPTIONS
+        )
         self._mutate_row_stub = self._channel.unary_unary(
             _MUTATE_ROW_METHOD,
             request_serializer=MutateRowRequest.serialize,
diff --git a/packages/google-cloud-bigtable/google/cloud/bigtable/data/_sync_autogen/_accelerator_client.py b/packages/google-cloud-bigtable/google/cloud/bigtable/data/_sync_autogen/_accelerator_client.py
index 452fcc9c7b72..6b61599736fb 100644
--- a/packages/google-cloud-bigtable/google/cloud/bigtable/data/_sync_autogen/_accelerator_client.py
+++ b/packages/google-cloud-bigtable/google/cloud/bigtable/data/_sync_autogen/_accelerator_client.py
@@ -42,6 +42,8 @@
 
 _MUTATE_ROW_METHOD = "/google.bigtable.v2.Bigtable/MutateRow"
 _READ_ROWS_METHOD = "/google.bigtable.v2.Bigtable/ReadRows"
+_MAX_RECEIVE_MESSAGE_LENGTH = 256 * 1024 * 1024
+_CHANNEL_OPTIONS = (("grpc.max_receive_message_length", _MAX_RECEIVE_MESSAGE_LENGTH),)
 
 
 class _AcceleratorClient:
@@ -55,7 +57,9 @@ class _AcceleratorClient:
     def __init__(self, uds_path: str, auth_secret: str):
         self._uds_path = uds_path
         self._metadata = (("x-accelerator-token", auth_secret),)
-        self._channel = insecure_channel(_uds_target(uds_path))
+        self._channel = insecure_channel(
+            _uds_target(uds_path), options=_CHANNEL_OPTIONS
+        )
         self._mutate_row_stub = self._channel.unary_unary(
             _MUTATE_ROW_METHOD,
             request_serializer=MutateRowRequest.serialize,