Information Schema INNODB_BUFFER_POOL_PAGES Table

The Information Schema INNODB_BUFFER_POOL_PAGES table is a Percona enhancement, and is only available for XtraDB, not InnoDB (see XtraDB and InnoDB). It contains a record for each page in the buffer pool.

It has the following columns:

PAGE_TYPEType of page; one of index, undo_log, inode, ibuf_free_list, allocated, bitmap, sys, trx_sys, fsp_hdr, xdes, blob, zblob, zblob2 and unknown.
SPACE_IDTablespace ID.
PAGE_NOPage offset within tablespace.
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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