diff --git a/manual/config/ccnet-conf.md b/manual/config/ccnet-conf.md
index faeb6edbe..313e80d47 100644
--- a/manual/config/ccnet-conf.md
+++ b/manual/config/ccnet-conf.md
@@ -28,15 +28,6 @@ CA_PATH = /etc/mysql/ca.pem
 
 When set `use_ssl` to true and `skip_verify` to false, it will check whether the MySQL server certificate is legal through the CA configured in `ca_path`. The `ca_path` is a trusted CA certificate path for signing MySQL server certificates. When `skip_verify` is true, there is no need to add the `ca_path` option. The MySQL server certificate won't be verified at this time.
 
-## Using unix_socket Authentication Plugin
-
-Since Seafile 10.0.3 and 10.0.7 Pro, you can use unix_socket authentication plugin provided by MariaDB/MySQL. To enable it, you need to specify the `UNIX_SOCKET` option without user name and password.
-
-```
-[Database]
-UNIX_SOCKET = /var/run/mysqld/mysqld.sock
-```
-
 ## Changing name of table 'Group'
 
 There is a table named 'Group' in ccnet database, however, 'Group' is the key word in some of databases, you can configure this table name to avoid conflicts if necessary:
diff --git a/manual/config/seafevents-conf.md b/manual/config/seafevents-conf.md
index 2e689a104..3ab85fe32 100644
--- a/manual/config/seafevents-conf.md
+++ b/manual/config/seafevents-conf.md
@@ -23,14 +23,6 @@ enabled = true
 interval = 30m
 ```
 
-Since Seafile 11.0, you can use unix_socket authentication plugin provided by MariaDB/MySQL. To enable it, you need to specify the unix_socket option without password.
-
-```
-[DATABASE]
-#password = password
-unix_socket = /var/run/mysqld/mysqld.sock
-```
-
 > The following configurations for Pro Edition only
 
 ```
diff --git a/manual/config/seafile-conf.md b/manual/config/seafile-conf.md
index 85c12a94f..7cd8e8f14 100644
--- a/manual/config/seafile-conf.md
+++ b/manual/config/seafile-conf.md
@@ -240,14 +240,6 @@ ca_path = /etc/mysql/ca.pem
 ```
 When set `use_ssl` to true and `skip_verify` to false, it will check whether the MySQL server certificate is legal through the CA configured in `ca_path`. The `ca_path` is a trusted CA certificate path for signing MySQL server certificates. When `skip_verify` is true, there is no need to add the `ca_path` option. The MySQL server certificate won't be verified at this time.
 
-Since Seafile 11.0.1 and 11.0.1 Pro, you can use unix_socket authentication plugin provided by MariaDB/MySQL. To enable it, you need to specify the `unix_socket` option without user name and password.
-```
-[database]
-#user = root
-#password = root
-unix_socket = /var/run/mysqld/mysqld.sock
-```
-
 ## File Locking (Pro edition only)
 
 The Seafile Pro server auto expires file locks after some time, to prevent a locked file being locked for too long. The expire time can be tune in seafile.conf file.