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Remove unused macros as we erased the random readahead code in r5703.
Also fixed some comments.
This commit is contained in:
inaam 2009-08-27 15:20:35 +00:00
parent 8658a2c43d
commit 3811787c3e
2 changed files with 9 additions and 20 deletions
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21
buf/buf0rea.c
View file

@ -38,14 +38,6 @@ Created 11/5/1995 Heikki Tuuri
#include "srv0start.h"
#include "srv0srv.h"
/** The size in blocks of the area where the random read-ahead algorithm counts
the accessed pages when deciding whether to read-ahead */
#define BUF_READ_AHEAD_RANDOM_AREA BUF_READ_AHEAD_AREA
/** There must be at least this many pages in buf_pool in the area to start
a random read-ahead */
#define BUF_READ_AHEAD_RANDOM_THRESHOLD (1 + BUF_READ_AHEAD_RANDOM_AREA / 2)
/** The linear read-ahead area size */
#define BUF_READ_AHEAD_LINEAR_AREA BUF_READ_AHEAD_AREA
@ -62,7 +54,8 @@ flag is cleared and the x-lock released by an i/o-handler thread.
@return 1 if a read request was queued, 0 if the page already resided
in buf_pool, or if the page is in the doublewrite buffer blocks in
which case it is never read into the pool, or if the tablespace does
not exist or is being dropped */
not exist or is being dropped
@return 1 if read request is issued. 0 if it is not */
static
ulint
buf_read_page_low(
@ -168,12 +161,10 @@ buf_read_page_low(
High-level function which reads a page asynchronously from a file to the
buffer buf_pool if it is not already there. Sets the io_fix flag and sets
an exclusive lock on the buffer frame. The flag is cleared and the x-lock
released by the i/o-handler thread. Does a random read-ahead if it seems
sensible.
@return number of page read requests issued: this can be greater than
1 if read-ahead occurred */
released by the i/o-handler thread.
@return TRUE if page has been read in, FALSE in case of failure */
UNIV_INTERN
ulint
ibool
buf_read_page(
/*==========*/
ulint space, /*!< in: space id */
@ -209,7 +200,7 @@ buf_read_page(
/* Increment number of I/O operations used for LRU policy. */
buf_LRU_stat_inc_io();
return(count);
return(count > 0 ? TRUE : FALSE);
}
/********************************************************************//**

8
include/buf0rea.h
View file

@ -33,12 +33,10 @@ Created 11/5/1995 Heikki Tuuri
High-level function which reads a page asynchronously from a file to the
buffer buf_pool if it is not already there. Sets the io_fix flag and sets
an exclusive lock on the buffer frame. The flag is cleared and the x-lock
released by the i/o-handler thread. Does a random read-ahead if it seems
sensible.
@return number of page read requests issued: this can be greater than
1 if read-ahead occurred */
released by the i/o-handler thread.
@return TRUE if page has been read in, FALSE in case of failure */
UNIV_INTERN
ulint
ibool
buf_read_page(
/*==========*/
ulint space, /*!< in: space id */