Fix Bug#36600 SHOW STATUS takes a lot of CPU in buf_get_latched_pages_number
by removing the Innodb_buffer_pool_pages_latched variable from
SHOW STATUS output in non-UNIV_DEBUG compilation.
Approved by: Heikki
CPU-bound SELECT queries. (Bug #15815)
Fix: replace the mutex by one mutex protecting the 'flush list'
(and the free list) and several mutexes protecting portions of the
buffer pool, where we keep several indivudual LRU lists of pages.
This patch is from Sunny Bains and Heikki Tuuri.
structure is reserved for every index in the data dictionary cache.
(Bug #20877)
We could shrink the structure further to three 32-bit words or two
64-bit words by turning the remaining fields to bit-fields.
Unfortunately, the fields are not protected by any mutex, and thus we
would better keep each field aligned to a machine word.
btr_search_t, buf_block_t: Rename "ulint side" to "ibool left_side".
Remove BTR_SEARCH_LEFT_SIDE and BTR_SEARCH_RIGHT_SIDE, and also rename
some local variables and function parameters from "ulint side" to
"ibool left_side".
btr_search_t: Remove the unused fields last_search, n_direction, direction,
and modify_clock. Remove the unused constants BTR_SEA_NO_DIRECTION,
BTR_SEA_LEFT, BTR_SEA_RIGHT, and BTR_SEA_SAME_REC.
btr_search_t: Remove magic_n unless #defined UNIV_DEBUG. Turn an assertion
about the magic number into a debug assertion.
and lexer files). From now on, the following Emacs cc-mode settings apply
when indenting C function bodies in InnoDB:
(setq c-basic-offset 8)
(setq c-label-minimum-indentation 0)
(add-to-list 'c-offsets-alist '(c . 0))
(add-to-list 'c-offsets-alist '(label . [0]))
The indentation rules for function declarations still have not been
formalized, and they must be formatted manually.
Try to limit all lines to at most 79 characters (assuming TAB stops every
8 characters) by splitting lines before opening parenthesis, or at
string constants.
Fix some grammar mistakes in diagnostic output:
match to, match with -> match
found from -> found in
trying rename -> trying to rename
Fix an error in page_check_dir(): it said "supremum not pointed to"
when the infimum was not pointed to.
Enclose commented-out code snippets in #if 0 ... #endif instead of /* ... */.
Add (void*) casts to some %p parameters in fprintf() calls. Try to
split lines before a binary operator, not after one. (These three fixes
were not made everywhere.)
space id on the disk do not match those in the memory. Also write to
the error log if a page was read from the doublewrite buffer. The
doublewrite buffer should be only read by the lower-level function fil_io()
at database startup.
new tablespaces created from now on.
btr_store_big_rec_extern_fields(): Set FIL_PAGE_TYPE to FIL_PAGE_TYPE_BLOB.
buf_page_print(): Decode FIL_PAGE_TYPE. Replace if-else with switch().
buf_page_create(): Set FIL_PAGE_PREV, FIL_PAGE_NEXT and FIL_PAGE_TYPE.
trx_sysf_create(): Set FIL_PAGE_TYPE to FIL_PAGE_TYPE_TRX_SYS.
Initialize TRX_SYS_RSEG_SPACE.
FIL_PAGE_TYPE: Document that the field cannot be relied on in older
versions of MySQL/InnoDB. Add new type codes.
ibuf_bitmap_page_init(): Document that the rest of the page is uninitialized.
ibuf_add_free_page(): Log the setting of FIL_PAGE_TYPE.
fsp_header_init(): Set FIL_PAGE_TYPE to FIL_PAGE_TYPE_FSP_HDR.
Initialize FSP_NOT_USED.
fsp_fill_free_list(): Set FIL_PAGE_TYPE to FIL_PAGE_TYPE_XDES.
fsp_alloc_seg_inode_page(): Set FIL_PAGE_TYPE to FIL_PAGE_INODE.
fseg_create_general(): Set FIL_PAGE_TYPE to FIL_PAGE_TYPE_SYS.
