Information Schema INNODB_BUFFER_POOL_PAGES_INDEX 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 information about buffer pool index pages.
It has the following columns:
Column
Description
INDEX_ID
Index name
SPACE_ID
Tablespace ID
PAGE_NO
Page offset within tablespace.
N_RECS
Number of user records on the page.
DATA_SIZE
Total data size in bytes of records in the page.
HASHED
1 if the block is in the adaptive hash index, 0 if not.
ACCESS_TIME
Page's last access time.
MODIFIED
1 if the page has been modified since being loaded, 0 if not.
DIRTY
1 if the page has been modified since it was last flushed, 0 if not
OLD
1 if the page in the in the old blocks of the LRU (least-recently-used) list, 0 if not.
LRU_POSITION
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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