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I've also noticed that my transaction history length is always zero; 
that's true on all my 10.6.13 instances (not just Bullseye). Is that 
information no longer stored here?

SELECT `count` FROM information_schema.INNODB_METRICS WHERE name = 
'trx_rseg_history_len';

On 5/11/2023 11:55 PM, mariadb@xxxxxxxxxxxxxx wrote:
> Just upgraded from 10.6.12 to 10.6.13 on a Debian Bullseye system, and 
> seeing this oddity. Innodb_buffer_pool_read_requests is zero, and seems 
> to remain at zero no matter what I do (I even tried selecting all the 
> data from a small table several times in a row with no change). It's 
> been running a couple hours now; I've restarted it a couple times. I 
> have 10.6.13 on a few other platforms as well (including Buster), and 
> I'm not seeing the same issue on them. What would cause this? I have no 
> other Bullseye systems running 10.6.13 yet, and the same system has been 
> running 10.6.12 for over a week now without showing this issue.
>
> The system _seems_ to be running fine, it's a replica system that is 
> being fed actively from the master (data comes in to it very regularly).
>
> MariaDB [(none)]> SHOW GLOBAL STATUS LIKE 'innodb_buffer_pool_%';
> +-----------------------------------------+--------------------------------------------------+
> | Variable_name                           | Value                     |
> +-----------------------------------------+--------------------------------------------------+
> | Innodb_buffer_pool_dump_status          |                     |
> | Innodb_buffer_pool_load_status          | Buffer pool(s) load 
> completed at 230511 23:21:26 |
> | Innodb_buffer_pool_resize_status        |                     |
> | Innodb_buffer_pool_load_incomplete      | OFF                     |
> | Innodb_buffer_pool_pages_data           | 609103                     |
> | Innodb_buffer_pool_bytes_data           | 9979543552 
>                      |
> | Innodb_buffer_pool_pages_dirty          | 19465                     |
> | Innodb_buffer_pool_bytes_dirty          | 318914560                     |
> | Innodb_buffer_pool_pages_flushed        | 0                     |
> | Innodb_buffer_pool_pages_free           | 299441                     |
> | Innodb_buffer_pool_pages_made_not_young | 0                     |
> | Innodb_buffer_pool_pages_made_young     | 107                     |
> | Innodb_buffer_pool_pages_misc           | 0                     |
> | Innodb_buffer_pool_pages_old            | 224824                     |
> | Innodb_buffer_pool_pages_total          | 908544                     |
> | Innodb_buffer_pool_pages_lru_flushed    | 0                     |
> | Innodb_buffer_pool_pages_lru_freed      | 0                     |
> | Innodb_buffer_pool_pages_split          | 726                     |
> | Innodb_buffer_pool_read_ahead_rnd       | 0                     |
> | Innodb_buffer_pool_read_ahead           | 3                     |
> | Innodb_buffer_pool_read_ahead_evicted   | 0                     |
> | Innodb_buffer_pool_read_requests        | 0                     |
> | Innodb_buffer_pool_reads                | 604346                     |
> | Innodb_buffer_pool_wait_free            | 0                     |
> | Innodb_buffer_pool_write_requests       | 3639341                     |
> +-----------------------------------------+--------------------------------------------------+
> 25 rows in set (0.000 sec)
>
> 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         | 80             |
> | innodb_buffer_pool_filename         | ib_buffer_pool |
> | innodb_buffer_pool_load_abort       | OFF            |
> | innodb_buffer_pool_load_at_startup  | ON             |
> | innodb_buffer_pool_load_now         | OFF            |
> | innodb_buffer_pool_size             | 15032385536    |
> +-------------------------------------+----------------+
> 9 rows in set (0.000 sec)
>
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