The INFORMATION_SCHEMA INNODB_BUFFER_PAGE Table Page Type Description SYSTEM System page TRX_SYSTEM Transaction system data UNDO_LOG Undo log page UNKNOWN Unknown ZLOB_DATA Compressed LOB data ZLOB_FIRST First page of compressed LOB ZLOB_FRAG Compressed LOB fragment ZLOB_FRAG_ENTRY Compressed LOB fragment index ZLOB_INDEX Compressed LOB index The flush type. The number of threads using this block within the buffer pool. When zero, the block is eligible to be evicted. Whether a hash index has been built on this page. The Log Sequence Number of the youngest modification. The Log Sequence Number of the oldest modification. An abstract number used to judge the first access time of the page. The name of the table the page belongs to. This column is applicable only to pages with a  PAGE_TYPE value of  INDEX . The column is  NULL  if the server has not yet accessed the table. The name of the index the page belongs to. This can be the name of a clustered index or a secondary index. This column is applicable only to pages with a  PAGE_TYPE  value of  INDEX . The number of records within the page. The sum of the sizes of the records. This column is applicable only to pages with a  PAGE_TYPE  value of INDEX . • FLUSH_TYPE • FIX_COUNT • IS_HASHED • NEWEST_MODIFICATION • OLDEST_MODIFICATION • ACCESS_TIME • TABLE_NAME • INDEX_NAME • NUMBER_RECORDS • DATA_SIZE 4843