The database buffer pool global types for the directory. More...

#include "os0event.h"
#include "sync0rw.h"
#include "ut0mutex.h"
#include "ut0ut.h"

Classes
class	page_id_t
	Page identifier. More...

Macros
#define	BUF_NO_CHECKSUM_MAGIC 0xDEADBEEFUL
	Magic value to use instead of checksums when they are disabled. More...


#define	BUF_BUDDY_LOW_SHIFT UNIV_ZIP_SIZE_SHIFT_MIN
	Parameters of binary buddy system for compressed pages (buf0buddy.h) More...

#define	BUF_BUDDY_LOW (1U << BUF_BUDDY_LOW_SHIFT)
	Smallest buddy page size. More...

#define	BUF_BUDDY_SIZES (UNIV_PAGE_SIZE_SHIFT - BUF_BUDDY_LOW_SHIFT)
	Actual number of buddy sizes based on current page size. More...

#define	BUF_BUDDY_SIZES_MAX (UNIV_PAGE_SIZE_SHIFT_MAX - BUF_BUDDY_LOW_SHIFT)
	Maximum number of buddy sizes based on the max page size. More...

#define	BUF_BUDDY_HIGH (BUF_BUDDY_LOW << BUF_BUDDY_SIZES)
	twice the maximum block size of the buddy system; the underlying memory is aligned by this amount: this must be equal to UNIV_PAGE_SIZE More...

Typedefs
typedef byte	buf_frame_t
	A buffer frame. More...

typedef ib_bpmutex_t	BPageMutex

typedef ib_mutex_t	BufListMutex

typedef ib_mutex_t	FlushListMutex

typedef BPageMutex	BufPoolZipMutex

typedef rw_lock_t	BPageLock

Enumerations
enum	buf_flush_t { BUF_FLUSH_LRU = 0, BUF_FLUSH_LIST, BUF_FLUSH_SINGLE_PAGE, BUF_FLUSH_N_TYPES }
	Flags for flush types. More...

enum	buf_remove_t { BUF_REMOVE_ALL_NO_WRITE, BUF_REMOVE_FLUSH_NO_WRITE, BUF_REMOVE_FLUSH_WRITE }
	Algorithm to remove the pages for a tablespace from the buffer pool. More...

enum	buf_io_fix { BUF_IO_NONE = 0, BUF_IO_READ, BUF_IO_WRITE, BUF_IO_PIN }
	Flags for io_fix types. More...

enum	srv_checksum_algorithm_t { SRV_CHECKSUM_ALGORITHM_CRC32, SRV_CHECKSUM_ALGORITHM_STRICT_CRC32, SRV_CHECKSUM_ALGORITHM_INNODB, SRV_CHECKSUM_ALGORITHM_STRICT_INNODB, SRV_CHECKSUM_ALGORITHM_NONE, SRV_CHECKSUM_ALGORITHM_STRICT_NONE }
	Alternatives for srv_checksum_algorithm, which can be changed by setting innodb_checksum_algorithm. More...

Functions
bool	is_checksum_strict (srv_checksum_algorithm_t algo)

bool	is_checksum_strict (ulint algo)

std::ostream &	operator<< (std::ostream &out, const page_id_t &page_id)
	Print the given page_id_t object. More...

Detailed Description

The database buffer pool global types for the directory.

Created 11/17/1995 Heikki Tuuri

Macro Definition Documentation

◆ BUF_BUDDY_HIGH

#define BUF_BUDDY_HIGH (BUF_BUDDY_LOW << BUF_BUDDY_SIZES)

twice the maximum block size of the buddy system; the underlying memory is aligned by this amount: this must be equal to UNIV_PAGE_SIZE

◆ BUF_BUDDY_LOW

#define BUF_BUDDY_LOW (1U << BUF_BUDDY_LOW_SHIFT)

Smallest buddy page size.

◆ BUF_BUDDY_LOW_SHIFT

#define BUF_BUDDY_LOW_SHIFT UNIV_ZIP_SIZE_SHIFT_MIN

Parameters of binary buddy system for compressed pages (buf0buddy.h)

Zip shift value for the smallest page size

◆ BUF_BUDDY_SIZES

#define BUF_BUDDY_SIZES (UNIV_PAGE_SIZE_SHIFT - BUF_BUDDY_LOW_SHIFT)

Actual number of buddy sizes based on current page size.

◆ BUF_BUDDY_SIZES_MAX

#define BUF_BUDDY_SIZES_MAX (UNIV_PAGE_SIZE_SHIFT_MAX - BUF_BUDDY_LOW_SHIFT)

Maximum number of buddy sizes based on the max page size.

◆ BUF_NO_CHECKSUM_MAGIC

#define BUF_NO_CHECKSUM_MAGIC 0xDEADBEEFUL

Magic value to use instead of checksums when they are disabled.

Typedef Documentation

◆ BPageLock

typedef rw_lock_t BPageLock

◆ BPageMutex

typedef ib_bpmutex_t BPageMutex

◆ buf_frame_t

typedef byte buf_frame_t

A buffer frame.

See also: page_t

◆ BufListMutex

typedef ib_mutex_t BufListMutex

◆ BufPoolZipMutex

typedef BPageMutex BufPoolZipMutex

◆ FlushListMutex

typedef ib_mutex_t FlushListMutex

Enumeration Type Documentation

◆ buf_flush_t

enum buf_flush_t

Flags for flush types.

Enumerator
BUF_FLUSH_LRU	flush via the LRU list
BUF_FLUSH_LIST	flush via the flush list of dirty blocks
BUF_FLUSH_SINGLE_PAGE	flush via the LRU list but only a single page
BUF_FLUSH_N_TYPES	index of last element + 1

◆ buf_io_fix

enum buf_io_fix

Flags for io_fix types.

Enumerator
BUF_IO_NONE	no pending I/O
BUF_IO_READ	read pending
BUF_IO_WRITE	write pending
BUF_IO_PIN	disallow relocation of block and its removal of from the flush_list

◆ buf_remove_t

enum buf_remove_t

Algorithm to remove the pages for a tablespace from the buffer pool.

See buf_LRU_flush_or_remove_pages().

Enumerator
BUF_REMOVE_ALL_NO_WRITE	Remove all pages from the buffer pool, don't write or sync to disk.
BUF_REMOVE_FLUSH_NO_WRITE	Remove only, from the flush list, don't write or sync to disk.
BUF_REMOVE_FLUSH_WRITE	Flush dirty pages to disk only don't remove from the buffer pool.

◆ srv_checksum_algorithm_t

enum srv_checksum_algorithm_t

Alternatives for srv_checksum_algorithm, which can be changed by setting innodb_checksum_algorithm.

Enumerator
SRV_CHECKSUM_ALGORITHM_CRC32	Write crc32, allow crc32, innodb or none when reading.
SRV_CHECKSUM_ALGORITHM_STRICT_CRC32	Write crc32, allow crc32 when reading.
SRV_CHECKSUM_ALGORITHM_INNODB	Write innodb, allow crc32, innodb or none when reading.
SRV_CHECKSUM_ALGORITHM_STRICT_INNODB	Write innodb, allow innodb when reading.
SRV_CHECKSUM_ALGORITHM_NONE	Write none, allow crc32, innodb or none when reading.
SRV_CHECKSUM_ALGORITHM_STRICT_NONE	Write none, allow none when reading.

Function Documentation

◆ is_checksum_strict() [1/2]

bool is_checksum_strict ( srv_checksum_algorithm_t algo )

inline

◆ is_checksum_strict() [2/2]

bool is_checksum_strict ( ulint algo )