The Information Schema INNODB_BUFFER_POOL_PAGES_BLOB table is a Percona enchancement, and is only available for XtraDB, not InnoDB (see XtraDB and InnoDB). It contains information about buffer pool blob pages.
It has the following columns:
| Column | Description |
|---|---|
SPACE_ID |
Tablespace ID. |
PAGE_NO |
Page offset within tablespace. |
COMPRESSED |
1 if the blob contains compressed data, 0 if not. |
PART_LEN |
Page data length. |
NEXT_PAGE_NO |
Next page number. |
LRU_POSITION |
Page position in the LRU (least-recently-used) list. |
FIX_COUNT |
Page reference count, incremented each time the page is accessed. 0 if the page is not currently being accessed. |
FLUSH_TYPE |
Flush type of the most recent flush.0 (LRU), 2 (flush_list) |
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https://mariadb.com/kb/en/information-schema-innodb_buffer_pool_pages_blob-table/