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Docs/manual.texi: Added Innobase documentation configure.in: Incremented version include/my_base.h: Added option for Innobase myisam/mi_check.c: cleanup mysql-test/t/bdb.test: cleanup mysql-test/t/innobase.test: Extended with new tests from bdb.test mysql-test/t/merge.test: Added test of SHOW create mysys/my_init.c: Fix for UNIXWARE 7 scripts/mysql_install_db.sh: Always write how to start mysqld scripts/safe_mysqld.sh: Fixed type sql/ha_innobase.cc: Update to new version sql/ha_innobase.h: Update to new version sql/handler.h: Added 'update_table_comment()' and 'append_create_info()' sql/sql_delete.cc: Fixes for Innobase sql/sql_select.cc: Fixes for Innobase sql/sql_show.cc: Append create information (for MERGE tables) sql/sql_update.cc: Fixes for Innobase
110 lines
3.9 KiB
C
110 lines
3.9 KiB
C
/******************************************************
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The database buffer pool flush algorithm
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(c) 1995 Innobase Oy
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Created 11/5/1995 Heikki Tuuri
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*******************************************************/
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#ifndef buf0flu_h
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#define buf0flu_h
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#include "univ.i"
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#include "buf0types.h"
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#include "ut0byte.h"
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#include "mtr0types.h"
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/************************************************************************
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Updates the flush system data structures when a write is completed. */
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void
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buf_flush_write_complete(
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/*=====================*/
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buf_block_t* block); /* in: pointer to the block in question */
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/*************************************************************************
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Flushes pages from the end of the LRU list if there is too small
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a margin of replaceable pages there. */
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void
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buf_flush_free_margin(void);
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/*=======================*/
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/***********************************************************************
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This utility flushes dirty blocks from the end of the LRU list or flush_list.
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NOTE 1: in the case of an LRU flush the calling thread may own latches to
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pages: to avoid deadlocks, this function must be written so that it cannot
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end up waiting for these latches! NOTE 2: in the case of a flush list flush,
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the calling thread is not allowed to own any latches on pages! */
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ulint
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buf_flush_batch(
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/*============*/
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/* out: number of blocks for which the write
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request was queued */
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ulint flush_type, /* in: BUF_FLUSH_LRU or BUF_FLUSH_LIST; if
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BUF_FLUSH_LIST, then the caller must not own
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any latches on pages */
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ulint min_n, /* in: wished minimum mumber of blocks flushed
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(it is not guaranteed that the actual number
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is that big, though) */
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dulint lsn_limit); /* in the case BUF_FLUSH_LIST all blocks whose
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oldest_modification is smaller than this
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should be flushed (if their number does not
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exceed min_n), otherwise ignored */
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/**********************************************************************
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Waits until a flush batch of the given type ends */
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void
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buf_flush_wait_batch_end(
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/*=====================*/
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ulint type); /* in: BUF_FLUSH_LRU or BUF_FLUSH_LIST */
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/************************************************************************
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This function should be called at a mini-transaction commit, if a page was
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modified in it. Puts the block to the list of modified blocks, if it not
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already in it. */
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UNIV_INLINE
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void
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buf_flush_note_modification(
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/*========================*/
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buf_block_t* block, /* in: block which is modified */
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mtr_t* mtr); /* in: mtr */
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/************************************************************************
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This function should be called when recovery has modified a buffer page. */
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UNIV_INLINE
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void
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buf_flush_recv_note_modification(
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/*=============================*/
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buf_block_t* block, /* in: block which is modified */
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dulint start_lsn, /* in: start lsn of the first mtr in a
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set of mtr's */
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dulint end_lsn); /* in: end lsn of the last mtr in the
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set of mtr's */
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/************************************************************************
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Returns TRUE if the file page block is immediately suitable for replacement,
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i.e., transition FILE_PAGE => NOT_USED allowed. */
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ibool
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buf_flush_ready_for_replace(
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/*========================*/
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/* out: TRUE if can replace immediately */
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buf_block_t* block); /* in: buffer control block, must be in state
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BUF_BLOCK_FILE_PAGE and in the LRU list */
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/**********************************************************************
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Validates the flush list. */
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ibool
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buf_flush_validate(void);
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/*====================*/
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/* out: TRUE if ok */
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/* When buf_flush_free_margin is called, it tries to make this many blocks
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available to replacement in the free list and at the end of the LRU list (to
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make sure that a read-ahead batch can be read efficiently in a single
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sweep). */
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#define BUF_FLUSH_FREE_BLOCK_MARGIN (5 + BUF_READ_AHEAD_AREA)
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#define BUF_FLUSH_EXTRA_MARGIN (BUF_FLUSH_FREE_BLOCK_MARGIN / 4)
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#ifndef UNIV_NONINL
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#include "buf0flu.ic"
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#endif
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#endif
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