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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:

SPACE_IDTablespace ID.
PAGE_NOPage offset within tablespace.
COMPRESSED1 if the blob contains compressed data, 0 if not.
PART_LENPage data length.
NEXT_PAGE_NONext page number.
LRU_POSITIONPage position in the LRU (least-recently-used) list.
FIX_COUNTPage reference count, incremented each time the page is accessed. 0 if the page is not currently being accessed.
FLUSH_TYPEFlush type of the most recent flush.0 (LRU), 2 (flush_list)


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