buf_page_info_t Struct Reference

Public Attributes
ulint	block_id
unsigned	space_id:32
unsigned	page_num:32
unsigned	access_time:32
unsigned	pool_id:MAX_BUFFER_POOLS_BITS
unsigned	flush_type:2
unsigned	io_fix:2
unsigned	fix_count:19
unsigned	hashed:1
unsigned	is_old:1
unsigned	freed_page_clock:31
unsigned	zip_ssize:PAGE_ZIP_SSIZE_BITS
unsigned	page_state:BUF_PAGE_STATE_BITS
unsigned	page_type:4
unsigned	num_recs:UNIV_PAGE_SIZE_SHIFT_MAX-2
unsigned	data_size:UNIV_PAGE_SIZE_SHIFT_MAX
lsn_t	newest_mod
lsn_t	oldest_mod
index_id_t	index_id

Detailed Description

This structure defines information we will fetch from pages

currently cached in the buffer pool. It will be used to populate table INFORMATION_SCHEMA.INNODB_BUFFER_PAGE

Definition at line 106 of file i_s.cc.

Member Data Documentation

unsigned buf_page_info_t::access_time

Time of first access

Definition at line 110 of file i_s.cc.

ulint buf_page_info_t::block_id

Buffer Pool block ID

Definition at line 107 of file i_s.cc.

unsigned buf_page_info_t::data_size

Sum of the sizes of the records

Definition at line 131 of file i_s.cc.

unsigned buf_page_info_t::fix_count

Count of how manyfold this block is bufferfixed

Definition at line 116 of file i_s.cc.

unsigned buf_page_info_t::flush_type

Flush type

Definition at line 114 of file i_s.cc.

unsigned buf_page_info_t::freed_page_clock

the value of buf_pool->freed_page_clock

Definition at line 122 of file i_s.cc.

unsigned buf_page_info_t::hashed

Whether hash index has been built on this page

Definition at line 118 of file i_s.cc.

index_id_t buf_page_info_t::index_id

Index ID if a index page

Definition at line 136 of file i_s.cc.

unsigned buf_page_info_t::io_fix

type of pending I/O operation

Definition at line 115 of file i_s.cc.

unsigned buf_page_info_t::is_old

TRUE if the block is in the old blocks in buf_pool->LRU_old

Definition at line 120 of file i_s.cc.

lsn_t buf_page_info_t::newest_mod

Log sequence number of the youngest modification

Definition at line 132 of file i_s.cc.

unsigned buf_page_info_t::num_recs

Number of records on Page

Definition at line 129 of file i_s.cc.

lsn_t buf_page_info_t::oldest_mod

Log sequence number of the oldest modification

Definition at line 134 of file i_s.cc.

unsigned buf_page_info_t::page_num

Page number/offset

Definition at line 109 of file i_s.cc.

unsigned buf_page_info_t::page_state

Page state

Definition at line 126 of file i_s.cc.

unsigned buf_page_info_t::page_type

Page type

Definition at line 127 of file i_s.cc.

unsigned buf_page_info_t::pool_id

Buffer Pool ID. Must be less than MAX_BUFFER_POOLS

Definition at line 112 of file i_s.cc.

unsigned buf_page_info_t::space_id

Tablespace ID

Definition at line 108 of file i_s.cc.

unsigned buf_page_info_t::zip_ssize

Compressed page size

Definition at line 125 of file i_s.cc.

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The documentation for this struct was generated from the following file:

• storage/innobase/handler/i_s.cc