diff --git a/core/conf/demo/server_config.yaml b/core/conf/demo/server_config.yaml
index b9626eb952..743f15956e 100644
--- a/core/conf/demo/server_config.yaml
+++ b/core/conf/demo/server_config.yaml
@@ -132,7 +132,9 @@ cache:
 #                      | If nq >= gpu_search_threshold, the search computation will |            |                 |
 #                      | be executed on GPUs only;                                  |            |                 |
 #                      | if nq < gpu_search_threshold, the search computation will  |            |                 |
-#                      | be executed on both CPUs and GPUs.                         |            |                 |
+#                      | be executed on CPUs only.                                  |            |                 |
+#                      | The SQ8H index is special, if nq < gpu_search_threshold,   |            |                 |
+#                      | the search will be executed on both CPUs and GPUs.         |            |                 |
 #----------------------+------------------------------------------------------------+------------+-----------------+
 # search_resources     | The list of GPU devices used for search computation.       | DeviceList | gpu0            |
 #                      | Must be in format gpux.                                    |            |                 |
diff --git a/core/conf/server_config.template b/core/conf/server_config.template
index 2ccab5e200..2380088ecc 100644
--- a/core/conf/server_config.template
+++ b/core/conf/server_config.template
@@ -132,7 +132,9 @@ cache:
 #                      | If nq >= gpu_search_threshold, the search computation will |            |                 |
 #                      | be executed on GPUs only;                                  |            |                 |
 #                      | if nq < gpu_search_threshold, the search computation will  |            |                 |
-#                      | be executed on both CPUs and GPUs.                         |            |                 |
+#                      | be executed on CPUs only.                                  |            |                 |
+#                      | The SQ8H index is special, if nq < gpu_search_threshold,   |            |                 |
+#                      | the search will be executed on both CPUs and GPUs.         |            |                 |
 #----------------------+------------------------------------------------------------+------------+-----------------+
 # search_devices       | The list of GPU devices used for search computation.       | DeviceList | gpu0            |
 #                      | Must be in format gpux.                                    |            |                 |