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Merging Innodb plugin 1.0.5 revisions from 5.1-main from revisions 3149 to 3163

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also merged missing Innodb plugin revisions r5636,r5635 manually
This commit is contained in:
Satya B
2009-10-16 17:28:02 +05:30
parent 12c7d0cf33
commit d63eb541f5
109 changed files with 2599 additions and 2446 deletions
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10
storage/innobase/include/buf0rea.h
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@@ -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 */
@@ -48,7 +46,7 @@ buf_read_page(
Applies linear read-ahead if in the buf_pool the page is a border page of
a linear read-ahead area and all the pages in the area have been accessed.
Does not read any page if the read-ahead mechanism is not activated. Note
that the the algorithm looks at the 'natural' adjacent successor and
that the algorithm looks at the 'natural' adjacent successor and
predecessor of the page, which on the leaf level of a B-tree are the next
and previous page in the chain of leaves. To know these, the page specified
in (space, offset) must already be present in the buf_pool. Thus, the