The database buffer pool flush algorithm. More...

#include "buf0buf.h"
#include "fsp0types.h"
#include "mtr0mtr.h"
#include "srv0srv.h"

Functions
void	buf_flush_insert_into_flush_list (buf_pool_t buf_pool, buf_block_t block)
	Inserts a modified block into the flush list. More...

void	buf_flush_note_oldest_modification (buf_pool_t buf_pool, buf_block_t block, lsn_t start_lsn)
	As part of `buf_flush_note_modification()` we are noting the oldest modification for the block. More...

static void	buf_flush_note_modification (buf_block_t block, lsn_t start_lsn, lsn_t end_lsn, Flush_observer observer)
	This function should be called at a mini-transaction commit, if a page was modified in it. More...

Detailed Description

The database buffer pool flush algorithm.

Created 11/5/1995 Heikki Tuuri

Function Documentation

void buf_flush_insert_into_flush_list	(	buf_pool_t *	buf_pool,
		buf_block_t *	block
	)

Inserts a modified block into the flush list.

Parameters

[in]	buf_pool	buffer pool instance
[in,out]	block	block which is modified

static void buf_flush_note_modification	(	buf_block_t *	block,
		lsn_t	start_lsn,
		lsn_t	end_lsn,
		Flush_observer *	observer
	)

inlinestatic

This function should be called at a mini-transaction commit, if a page was modified in it.

Puts the block to the list of modified blocks, if it is not already in it.

Parameters

block	in: block which is modified
start_lsn	in: start lsn of the mtr that modified this block
end_lsn	in: end lsn of the mtr that modified this block
observer	in: flush observer

void buf_flush_note_oldest_modification	(	buf_pool_t *	buf_pool,
		buf_block_t *	block,
		lsn_t	start_lsn
	)

As part of buf_flush_note_modification() we are noting the oldest modification for the block.

If it already has one, it will not be changed.

Parameters

[in]	buf_pool	buffer pool instance
[in]	block	block which is modified
[in]	start_lsn	start lsn of the mtr that modified this block, it will become the oldest modification if it is non-zero