- 'innodb_buffer_pool_size' is changed to 'Dynamic Variable' (The Default value is still 128M. not changed.)

- able to monitor progress of resizing buffer pool (by global status 'innodb_buffer_pool_resize_status' or server error log)

- 'innodb_buffer_pool_chunk_size' is a new global read-only variable, default value is 128M.

The 'innodb_buffer_pool_chunk_size' unit is 1M. And the actual buffer pool size is always aligned to 'innodb_buffer_pool_chunk_size' * 'innodb_buffer_pool_instances' granularity.

(rb#4225 : Approved by Vasil and Sunny)


This push also contains following bug fixes:

Bug#19001299 : SEGV WHILE INITIALIZING BUFFER POOL
Bug#19069698 : ASSERT BTR_SEARCH_ENABLED IN PURGE AFTER SET GLOBAL INNODB_ADAPTIVE_HASH_INDEX=0