opened_tables count increasing rapidly number of opened tables is increasing rapidly after sometime. 

MariaDB [(none)]&gt; show global status like 'open%';
+--------------------------+--------+
| Variable_name            | Value  |
+--------------------------+--------+
| Open_files               | 6      |
| Open_streams             | 0      |
| Open_table_definitions   | 1200   |
| Open_tables              | 1200   |
| Opened_files             | 791203 |
| Opened_plugin_libraries  | 0      |
| Opened_table_definitions | 788523 |
| Opened_tables            | 807692 |
| Opened_views             | 0      |
+--------------------------+--------+
9 rows in set (0.00 sec)

MariaDB [(none)]&gt; show global status like 'up%';
+---------------------------+-------+
| Variable_name             | Value |
+---------------------------+-------+
| Update_scan               | 200   |
| Uptime                    | 2028  |
| Uptime_since_flush_status | 2028  |

how global status like '%conn%';
+-----------------------------------------------+-------+
| Variable_name                                 | Value |
+-----------------------------------------------+-------+
| Aborted_connects                              | 2     |
| Connection_errors_accept                      | 0     |
| Connection_errors_internal                    | 0     |
| Connection_errors_max_connections             | 0     |
| Connection_errors_peer_address                | 0     |
| Connection_errors_select                      | 0     |
| Connection_errors_tcpwrap                     | 0     |
| Connections                                   | 151   |
| Max_used_connections                          | 13    |
| Performance_schema_session_connect_attrs_lost | 0     |
| Slave_connections                             | 0     |
| Slaves_connected                              | 0     |
| Ssl_client_connects                           | 0     |
| Ssl_connect_renegotiates                      | 0     |
| Ssl_finished_connects                         | 0     |
| Threads_connected                             | 12    |
| wsrep_connected                               | OFF   |
+-----------------------------------------------+-------+

 select count(*) from information_schema.tables;
+----------+
| count(*) |
+----------+
|     1986 |
+----------+


Can anyone suggest how to investigate why the opened tables count is increasing so rapidly and how to resolve this issue?
would you confirm what load you are running during this 30 mins of database uptime?  this is actually accumulative values of the total opened tables and a smaller table open cache or creating temporary tables can increase this value.

paste values of CREATED_TMP_TABLES, TABLE_OPEN_CACHE.  Also paste total ram available for this DB on your machine.

Thanks