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b95d2778aa
The issues was: - For some tables with a lot of not packed fields, we didn't allocate enough memory in head page which caused DBUG_ASSERT's - Removed wrong DBUG_ASSERT() - Fixed a problem with underflow() where it generates a key page where all keys didn't fit. - Max key length is now limited by block_size/3 (was block_size /2). This is required for underflow() to work with packed keys. mysql-test/lib/v1/mysql-test-run.pl: Remove --alignment=8 as this doesn't work on 64 bit systems mysql-test/suite/maria/r/small_blocksize.result: Test case for Aria bug mysql-test/suite/maria/t/small_blocksize-master.opt: Test case for Aria bug mysql-test/suite/maria/t/small_blocksize.test: Test case for Aria bug storage/maria/ha_maria.cc: Fixed comment storage/maria/ma_bitmap.c: Fixed wrong variable usage in find_where_to_split_row() where we allocated too little memory for head page. We did not take into account space for head extents (long VARCHAR) when trying to split row on head page. This caused us to allocate too little space from bitmap which lead to ASSERT failures later. storage/maria/ma_blockrec.c: Made some argument const (to ensure they was not accidently changed) Removed wrong DBUG_ASSERT() storage/maria/ma_blockrec.h: Removed not used variable storage/maria/ma_delete.c: Added my_afree() in case of error More comments and DBUG_ASSERT() for underflow() storage/maria/ma_open.c: Make keyinfo->underflow_block_length smaller for packed keys. This has to be done as for long packed keys, underflow() otherwise generates a key page where all keys didn't fit. storage/maria/ma_page.c: New DBUG_ASSERT() storage/maria/ma_write.c: Fixed comment storage/maria/maria_def.h: We have to have space for at least 3 keys on a key page. (Otherwise the underflow() code doesn't work for packed keys, even when we have an underflow() for an empty key page)
299 lines
14 KiB
C
299 lines
14 KiB
C
/* Copyright (C) 2007 Michael Widenius
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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Storage of records in block
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*/
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#define LSN_SIZE 7
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#define DIR_COUNT_SIZE 1 /* Stores number of rows on page */
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#define DIR_FREE_SIZE 1 /* Pointer to first free dir entry */
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#define EMPTY_SPACE_SIZE 2 /* Stores empty space on page */
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#define PAGE_TYPE_SIZE 1
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#define PAGE_SUFFIX_SIZE 4 /* Bytes for checksum */
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#define PAGE_HEADER_SIZE (LSN_SIZE + DIR_COUNT_SIZE + DIR_FREE_SIZE +\
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EMPTY_SPACE_SIZE + PAGE_TYPE_SIZE)
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#define PAGE_OVERHEAD_SIZE (PAGE_HEADER_SIZE + DIR_ENTRY_SIZE + \
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PAGE_SUFFIX_SIZE)
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#define BLOCK_RECORD_POINTER_SIZE 6
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#define FULL_PAGE_SIZE(block_size) ((block_size) - LSN_SIZE - \
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PAGE_TYPE_SIZE - PAGE_SUFFIX_SIZE)
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#define ROW_EXTENT_PAGE_SIZE 5
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#define ROW_EXTENT_COUNT_SIZE 2
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#define SUB_RANGE_SIZE 2
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#define BLOCK_FILLER_SIZE 2
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#define ROW_EXTENT_SIZE (ROW_EXTENT_PAGE_SIZE + ROW_EXTENT_COUNT_SIZE)
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#define TAIL_BIT 0x8000 /* Bit in page_count to signify tail */
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#define START_EXTENT_BIT 0x4000 /* Bit in page_count to signify start*/
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/* page_count set by bitmap code for tail pages */
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#define TAIL_PAGE_COUNT_MARKER 0xffff
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/* Number of extents reserved MARIA_BITMAP_BLOCKS to store head part */
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#define ELEMENTS_RESERVED_FOR_MAIN_PART 4
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/* This is just used to prealloc a dynamic array */
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#define AVERAGE_BLOB_SIZE 1024L*1024L
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/* Number of pages to store continuous blob parts */
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#define BLOB_SEGMENT_MIN_SIZE 128
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/* Fields before 'row->null_field_lengths' used by find_where_to_split_row */
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#define EXTRA_LENGTH_FIELDS 3
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/* Size for the different parts in the row header (and head page) */
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#define FLAG_SIZE 1
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#define VERPTR_SIZE 7
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#define DIR_ENTRY_SIZE 4
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#define FIELD_OFFSET_SIZE 2 /* size of pointers to field starts */
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/* Minimum header size needed for a new row */
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#define BASE_ROW_HEADER_SIZE FLAG_SIZE
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#define PAGE_TYPE_MASK 7
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enum en_page_type { UNALLOCATED_PAGE, HEAD_PAGE, TAIL_PAGE, BLOB_PAGE, MAX_PAGE_TYPE };
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#define PAGE_CAN_BE_COMPACTED 128 /* Bit in PAGE_TYPE */
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#define PAGE_TYPE_OFFSET LSN_SIZE
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#define DIR_COUNT_OFFSET (LSN_SIZE+PAGE_TYPE_SIZE)
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#define DIR_FREE_OFFSET (DIR_COUNT_OFFSET+DIR_COUNT_SIZE)
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#define EMPTY_SPACE_OFFSET (DIR_FREE_OFFSET+DIR_FREE_SIZE)
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/* Bits used for flag uchar (one byte, first in record) */
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#define ROW_FLAG_TRANSID 1
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#define ROW_FLAG_VER_PTR 2
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#define ROW_FLAG_DELETE_TRANSID 4
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#define ROW_FLAG_NULLS_EXTENDED 8
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#define ROW_FLAG_EXTENTS 128
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#define ROW_FLAG_ALL (1+2+4+8+128)
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/* Size for buffer to hold information about bitmap */
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#define MAX_BITMAP_INFO_LENGTH ((MARIA_MAX_KEY_BLOCK_LENGTH*8/3)*(61*11/60)+10)
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/******** Variables that affects how data pages are utilized ********/
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/* Minium size of tail segment */
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#define MIN_TAIL_SIZE 32
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/*
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Fixed length part of Max possible header size; See row data structure
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table in ma_blockrec.c.
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*/
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#define MAX_FIXED_HEADER_SIZE (FLAG_SIZE + 3 + ROW_EXTENT_SIZE + 3)
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#define TRANS_MAX_FIXED_HEADER_SIZE (MAX_FIXED_HEADER_SIZE + \
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TRANSID_SIZE + VERPTR_SIZE + \
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TRANSID_SIZE)
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/* We use 1 uchar in record header to store number of directory entries */
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#define MAX_ROWS_PER_PAGE 255
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#define END_OF_DIR_FREE_LIST ((uchar) 255)
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/* Bits for MARIA_BITMAP_BLOCKS->used */
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/* We stored data on disk in the block */
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#define BLOCKUSED_USED 1
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/* Bitmap on disk is block->org_bitmap_value ; Happens only on update */
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#define BLOCKUSED_USE_ORG_BITMAP 2
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/* We stored tail data on disk for the block */
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#define BLOCKUSED_TAIL 4
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/******* defines that affects allocation (density) of data *******/
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/*
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If the tail part (from the main block or a blob) would use more than 75 % of
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the size of page, store the tail on a full page instead of a shared
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tail page.
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*/
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#define MAX_TAIL_SIZE(block_size) ((block_size) *3 / 4)
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/* Don't allocate memory for too many row extents on the stack */
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#define ROW_EXTENTS_ON_STACK 32
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/* Functions to convert MARIA_RECORD_POS to/from page:offset */
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static inline MARIA_RECORD_POS ma_recordpos(pgcache_page_no_t page,
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uint dir_entry)
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{
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DBUG_ASSERT(dir_entry <= 255);
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DBUG_ASSERT(page > 0); /* page 0 is bitmap, not data page */
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return (MARIA_RECORD_POS) (((ulonglong) page << 8) | dir_entry);
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}
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static inline pgcache_page_no_t ma_recordpos_to_page(MARIA_RECORD_POS record_pos)
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{
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return (pgcache_page_no_t) (record_pos >> 8);
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}
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static inline uint ma_recordpos_to_dir_entry(MARIA_RECORD_POS record_pos)
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{
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return (uint) (record_pos & 255);
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}
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static inline uchar *dir_entry_pos(uchar *buff, uint block_size, uint pos)
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{
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return (buff + block_size - DIR_ENTRY_SIZE * pos - PAGE_SUFFIX_SIZE -
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DIR_ENTRY_SIZE);
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}
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/* ma_blockrec.c */
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void _ma_init_block_record_data(void);
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my_bool _ma_once_init_block_record(MARIA_SHARE *share, File dfile);
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my_bool _ma_once_end_block_record(MARIA_SHARE *share);
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my_bool _ma_init_block_record(MARIA_HA *info);
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void _ma_end_block_record(MARIA_HA *info);
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my_bool _ma_update_block_record(MARIA_HA *info, MARIA_RECORD_POS pos,
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const uchar *oldrec, const uchar *newrec);
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my_bool _ma_delete_block_record(MARIA_HA *info, const uchar *record);
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int _ma_read_block_record(MARIA_HA *info, uchar *record,
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MARIA_RECORD_POS record_pos);
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int _ma_read_block_record2(MARIA_HA *info, uchar *record,
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uchar *data, uchar *end_of_data);
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int _ma_scan_block_record(MARIA_HA *info, uchar *record,
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MARIA_RECORD_POS, my_bool);
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my_bool _ma_cmp_block_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def,
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const uchar *record, MARIA_RECORD_POS pos);
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my_bool _ma_scan_init_block_record(MARIA_HA *info);
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void _ma_scan_end_block_record(MARIA_HA *info);
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int _ma_scan_remember_block_record(MARIA_HA *info,
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MARIA_RECORD_POS *lastpos);
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void _ma_scan_restore_block_record(MARIA_HA *info,
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MARIA_RECORD_POS lastpos);
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MARIA_RECORD_POS _ma_write_init_block_record(MARIA_HA *info,
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const uchar *record);
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my_bool _ma_write_block_record(MARIA_HA *info, const uchar *record);
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my_bool _ma_write_abort_block_record(MARIA_HA *info);
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my_bool _ma_compare_block_record(register MARIA_HA *info,
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register const uchar *record);
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void _ma_compact_block_page(uchar *buff, uint block_size, uint rownr,
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my_bool extend_block, TrID min_read_from,
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uint min_row_length);
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my_bool enough_free_entries_on_page(MARIA_SHARE *share, uchar *page_buff);
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TRANSLOG_ADDRESS
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maria_page_get_lsn(uchar *page, pgcache_page_no_t page_no, uchar* data_ptr);
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/* ma_bitmap.c */
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extern const char *bits_to_txt[];
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my_bool _ma_bitmap_init(MARIA_SHARE *share, File file,
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pgcache_page_no_t *last_page);
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my_bool _ma_bitmap_end(MARIA_SHARE *share);
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my_bool _ma_bitmap_flush(MARIA_SHARE *share);
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my_bool _ma_bitmap_flush_all(MARIA_SHARE *share);
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void _ma_bitmap_reset_cache(MARIA_SHARE *share);
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my_bool _ma_bitmap_find_place(MARIA_HA *info, MARIA_ROW *row,
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MARIA_BITMAP_BLOCKS *result_blocks);
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my_bool _ma_bitmap_release_unused(MARIA_HA *info, MARIA_BITMAP_BLOCKS *blocks);
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my_bool _ma_bitmap_free_full_pages(MARIA_HA *info, const uchar *extents,
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uint count);
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my_bool _ma_bitmap_set(MARIA_HA *info, pgcache_page_no_t pos, my_bool head,
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uint empty_space);
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my_bool _ma_bitmap_reset_full_page_bits(MARIA_HA *info,
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MARIA_FILE_BITMAP *bitmap,
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pgcache_page_no_t page,
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uint page_count);
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my_bool _ma_bitmap_set_full_page_bits(MARIA_HA *info,
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MARIA_FILE_BITMAP *bitmap,
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pgcache_page_no_t page, uint page_count);
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uint _ma_free_size_to_head_pattern(MARIA_FILE_BITMAP *bitmap, uint size);
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my_bool _ma_bitmap_find_new_place(MARIA_HA *info, MARIA_ROW *new_row,
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pgcache_page_no_t page, uint free_size,
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MARIA_BITMAP_BLOCKS *result_blocks);
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my_bool _ma_check_bitmap_data(MARIA_HA *info,
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enum en_page_type page_type,
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uint empty_space, uint bitmap_pattern);
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my_bool _ma_check_if_right_bitmap_type(MARIA_HA *info,
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enum en_page_type page_type,
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pgcache_page_no_t page,
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uint *bitmap_pattern);
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uint _ma_bitmap_get_page_bits(MARIA_HA *info, MARIA_FILE_BITMAP *bitmap,
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pgcache_page_no_t page);
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void _ma_bitmap_delete_all(MARIA_SHARE *share);
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int _ma_bitmap_create_first(MARIA_SHARE *share);
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void _ma_bitmap_flushable(MARIA_HA *info, int non_flushable_inc);
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void _ma_bitmap_lock(MARIA_SHARE *share);
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void _ma_bitmap_unlock(MARIA_SHARE *share);
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void _ma_bitmap_set_pagecache_callbacks(PAGECACHE_FILE *file,
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MARIA_SHARE *share);
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#ifndef DBUG_OFF
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void _ma_print_bitmap(MARIA_FILE_BITMAP *bitmap, uchar *data,
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pgcache_page_no_t page);
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#endif
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void _ma_get_bitmap_description(MARIA_FILE_BITMAP *bitmap,
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uchar *bitmap_data,
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pgcache_page_no_t page,
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char *out);
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uint _ma_apply_redo_insert_row_head_or_tail(MARIA_HA *info, LSN lsn,
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uint page_type,
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my_bool new_page,
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const uchar *header,
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const uchar *data,
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size_t data_length);
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uint _ma_apply_redo_purge_row_head_or_tail(MARIA_HA *info, LSN lsn,
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uint page_type,
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const uchar *header);
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uint _ma_apply_redo_free_blocks(MARIA_HA *info, LSN lsn, LSN rec_lsn,
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const uchar *header);
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uint _ma_apply_redo_free_head_or_tail(MARIA_HA *info, LSN lsn,
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const uchar *header);
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uint _ma_apply_redo_insert_row_blobs(MARIA_HA *info, LSN lsn,
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const uchar *header, LSN redo_lsn,
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uint * const number_of_blobs,
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uint * const number_of_ranges,
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pgcache_page_no_t * const first_page,
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pgcache_page_no_t * const last_page);
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my_bool _ma_apply_redo_bitmap_new_page(MARIA_HA *info, LSN lsn,
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const uchar *header);
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my_bool _ma_apply_undo_row_insert(MARIA_HA *info, LSN undo_lsn,
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const uchar *header);
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my_bool _ma_apply_undo_row_delete(MARIA_HA *info, LSN undo_lsn,
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const uchar *header, size_t length);
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my_bool _ma_apply_undo_row_update(MARIA_HA *info, LSN undo_lsn,
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const uchar *header, size_t length);
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my_bool _ma_apply_undo_bulk_insert(MARIA_HA *info, LSN undo_lsn);
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my_bool write_hook_for_redo(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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my_bool write_hook_for_undo(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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my_bool write_hook_for_redo_delete_all(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_row_insert(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_row_delete(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_row_update(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_bulk_insert(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_file_id(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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my_bool write_hook_for_commit(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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void _ma_block_get_status(void *param, my_bool concurrent_insert);
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my_bool _ma_block_start_trans(void* param);
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my_bool _ma_block_start_trans_no_versioning(void *param);
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void _ma_block_update_status(void *param);
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void _ma_block_restore_status(void *param);
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my_bool _ma_block_check_status(void *param);
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