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5567a8c936
Implement a 10.4 redo log format, which extends the 10.3 format by introducing the MLOG_MEMSET record. MLOG_MEMSET: A new redo log record type for filling an area with a byte. mlog_memset(): Write the MLOG_MEMSET record. mlog_parse_nbytes(): Handle MLOG_MEMSET as well. trx_rseg_header_create(): Reduce the redo log volume by making use of mlog_memset() and the zero-initialization that happens inside page allocation. fil_addr_null: Remove. flst_init(): Create a variant that takes a zero-initialized buf_block_t* as a parameter, and only writes the FIL_NULL using mlog_memset(). flst_zero_addr(): A variant of flst_write_addr() that writes a null address using mlog_memset() for the FIL_NULL. The following fixes are replacing some use of MLOG_WRITE_STRING with the more compact MLOG_MEMSET record, or eliminating redundant redo log writes: btr_store_big_rec_extern_fields(): Invoke mlog_memset() for zero-initializing the tail of the ROW_FORMAT=COMPRESSED BLOB page. trx_sysf_create(), trx_rseg_format_upgrade(): Invoke mlog_memset() for zero-initializing the page trailer. fsp_header_init(), trx_rseg_header_create(): Remove redundant zero-initializations.
151 lines
4.5 KiB
Text
151 lines
4.5 KiB
Text
/*****************************************************************************
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Copyright (c) 1995, 2014, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/******************************************************************//**
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@file include/fut0lst.ic
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File-based list utilities
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Created 11/28/1995 Heikki Tuuri
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***********************************************************************/
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#include "buf0buf.h"
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/********************************************************************//**
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Writes a file address. */
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UNIV_INLINE
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void
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flst_write_addr(
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/*============*/
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fil_faddr_t* faddr, /*!< in: pointer to file faddress */
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fil_addr_t addr, /*!< in: file address */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ut_ad(faddr && mtr);
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ut_ad(mtr_memo_contains_page_flagged(mtr, faddr,
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MTR_MEMO_PAGE_X_FIX
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| MTR_MEMO_PAGE_SX_FIX));
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ut_a(addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA);
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ut_a(ut_align_offset(faddr, srv_page_size) >= FIL_PAGE_DATA);
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mlog_write_ulint(faddr + FIL_ADDR_PAGE, addr.page, MLOG_4BYTES, mtr);
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mlog_write_ulint(faddr + FIL_ADDR_BYTE, addr.boffset,
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MLOG_2BYTES, mtr);
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}
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/********************************************************************//**
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Reads a file address.
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@return file address */
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UNIV_INLINE
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fil_addr_t
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flst_read_addr(
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/*===========*/
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const fil_faddr_t* faddr, /*!< in: pointer to file faddress */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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fil_addr_t addr;
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ut_ad(faddr && mtr);
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addr.page = mtr_read_ulint(faddr + FIL_ADDR_PAGE, MLOG_4BYTES, mtr);
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addr.boffset = mtr_read_ulint(faddr + FIL_ADDR_BYTE, MLOG_2BYTES,
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mtr);
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ut_a(addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA);
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ut_a(ut_align_offset(faddr, srv_page_size) >= FIL_PAGE_DATA);
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return(addr);
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}
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/********************************************************************//**
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Initializes a list base node. */
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UNIV_INLINE
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void
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flst_init(
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/*======*/
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flst_base_node_t* base, /*!< in: pointer to base node */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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ut_ad(mtr_memo_contains_page_flagged(mtr, base,
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MTR_MEMO_PAGE_X_FIX
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| MTR_MEMO_PAGE_SX_FIX));
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mlog_write_ulint(base + FLST_LEN, 0, MLOG_4BYTES, mtr);
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flst_zero_addr(base + FLST_FIRST, mtr);
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flst_zero_addr(base + FLST_LAST, mtr);
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}
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/** Get the length of a list.
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@param[in] base base node
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@return length */
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UNIV_INLINE
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ulint
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flst_get_len(
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const flst_base_node_t* base)
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{
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return(mach_read_from_4(base + FLST_LEN));
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}
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/********************************************************************//**
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Gets list first node address.
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@return file address */
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UNIV_INLINE
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fil_addr_t
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flst_get_first(
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/*===========*/
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const flst_base_node_t* base, /*!< in: pointer to base node */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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return(flst_read_addr(base + FLST_FIRST, mtr));
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}
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/********************************************************************//**
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Gets list last node address.
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@return file address */
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UNIV_INLINE
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fil_addr_t
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flst_get_last(
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/*==========*/
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const flst_base_node_t* base, /*!< in: pointer to base node */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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return(flst_read_addr(base + FLST_LAST, mtr));
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}
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/********************************************************************//**
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Gets list next node address.
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@return file address */
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UNIV_INLINE
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fil_addr_t
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flst_get_next_addr(
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/*===============*/
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const flst_node_t* node, /*!< in: pointer to node */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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return(flst_read_addr(node + FLST_NEXT, mtr));
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}
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/********************************************************************//**
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Gets list prev node address.
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@return file address */
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UNIV_INLINE
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fil_addr_t
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flst_get_prev_addr(
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/*===============*/
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const flst_node_t* node, /*!< in: pointer to node */
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mtr_t* mtr) /*!< in: mini-transaction handle */
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{
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return(flst_read_addr(node + FLST_PREV, mtr));
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}
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