Marko Mäkelä 5567a8c936 MDEV-17138 Reduce redo log volume for undo tablespace initialization ... 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.		2018-09-11 21:32:36 +03:00
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mtr0log.cc	MDEV-17138 Reduce redo log volume for undo tablespace initialization	2018-09-11 21:32:36 +03:00
mtr0mtr.cc	MDEV-13564: Remove old crash-upgrade logic in 10.4	2018-09-11 21:32:15 +03:00