我不能改变 innodb_buffer_pool_instances

我最近将我的 mariadb 数据库更新到 10.5.5，我无法设置 innodb_buffer_pool_instances

innodb_log_file_size = 3G
innodb_buffer_pool_size = 12G
innodb_buffer_pool_instances = 12

但当

    MariaDB [(none)]> SHOW VARIABLES LIKE "%innodb_buffer_pool_%";
+-------------------------------------+----------------+
| Variable_name                       | Value          |
+-------------------------------------+----------------+
| innodb_buffer_pool_chunk_size       | 134217728      |
| innodb_buffer_pool_dump_at_shutdown | ON             |
| innodb_buffer_pool_dump_now         | OFF            |
| innodb_buffer_pool_dump_pct         | 25             |
| innodb_buffer_pool_filename         | ib_buffer_pool |
| innodb_buffer_pool_instances        | 1              |
| innodb_buffer_pool_load_abort       | OFF            |
| innodb_buffer_pool_load_at_startup  | ON             |
| innodb_buffer_pool_load_now         | OFF            |
| innodb_buffer_pool_size             | 12884901888    |
+-------------------------------------+----------------+

我需要其他变量来配置池实例吗？哪个？

非常感谢您的任何想法。