Update Install-Under-CentOS_LEMP.md (#180)

* Update Install-Under-CentOS_LEMP.md

* Update Install-Under-CentOS_LEMP.md

Author: TheWitness

Install-Under-CentOS_LEMP.md

@@ -204,25 +204,48 @@ during the installation.
    provide recommendations based on the actual system which will be more
    tailored to your environment.
 
+   If using MariaDB less than version 11.1 or MySQL use the settings below.
+   Note that you should revise up or down your settings depending on
+   the Cacti recommendation that you see once you start the installer.
+
    ```shell
    [mysqld]
-   character-set-server=utf8mb4
-   collation-server=utf8mb4_unicode_ci
-   max_allowed_packet=18M
-   max_heap_table_size=98M
-   tmp_table_size=64M
-   join_buffer_size=64M
-   innodb_buffer_pool_size=488M
-   innodb_doublewrite=OFF
-   innodb_flush_log_at_timeout=3
-   innodb_read_io_threads=32
-   innodb_write_io_threads=16
-   log-error                      = /var/log/mysql/mysql-error.log
-   log-queries-not-using-indexes  = 1
-   slow-query-log                 = 1
-   slow-query-log-file            = /var/log/mysql/mysql-slow.log
-   ```
+   character_set_client            = utf8mb4
+   character-set-server            = utf8mb4
+   collation-server                = utf8mb4_unicode_ci
+   innodb_file_format              = Barracuda
+   max_allowed_packet              = 16777777
+   max_heap_table_size             = 500M
+   join_buffer_size                = 32M
+   innodb_file_per_table           = ON
+   innodb_large_prefix             = 1
+   innodb_buffer_pool_size         = 500M
+   innodb_additional_mem_pool_size = 90M
+   innodb_flush_log_at_trx_commit  = 2
+   log-error                       = /var/log/mysql/mysql-error.log
+   log-queries-not-using-indexes   = 1
+   slow-query-log                  = 1
+   slow-query-log-file             = /var/log/mysql/mysql-slow.log
+   ```
+
+   If using MariaDB 11.0 or higher, use the settings below:
 
+   ```shell
+   [mariadb]
+   character_set_client            = utf8mb4
+   character_set_server            = utf8mb4
+   collation_server                = utf8mb4_unicode_ci
+   max_heap_table_size             = 500M
+   join_buffer_size                = 32M
+   innodb_buffer_pool_size         = 8G
+   innodb_doublewrite              = OFF
+   tmp_table_size                  = 500M
+   log-error                       = /var/log/mysql/mysql-error.log
+   log-queries-not-using-indexes   = 1
+   slow-query-log                  = 1
+   slow-query-log-file             = /var/log/mysql/mysql-slow.log
+   ```
+   
 2. Restart MySQL/MariaDB service to pick up the changes
 
    ```console