MYSQL 5.7 Innodb bufferpool settings
There is no problem, just confusing notation.  It is saying that there are 835482 blocks in instance #6.

Here is a buffer_pool of 3G and 8 instances:

mysql&gt; SHOW VARIABLES LIKE 'innodb_buffer_pool%';
...
| innodb_buffer_pool_instances        | 8              |
| innodb_buffer_pool_size             | 3145728000     |  -- 3GB

mysql&gt; SHOW ENGINE INNODB STATUS\G
*************************** 1. row ***************************
...
---BUFFER POOL 7
Buffer pool size        23999       -- 3G / 8 / 16K
Buffer pool size, bytes 393199616   -- 3G / 8


In your case, 835482 = 100G / 8 / 16K