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MDEV-19747: Deprecate and ignore innodb_log_optimize_ddl

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During native table rebuild or index creation, InnoDB used to skip
redo logging and write MLOG_INDEX_LOAD records to inform crash recovery
and Mariabackup of the gaps in redo log. This is fragile and prohibits
some optimizations, such as skipping the doublewrite buffer for
newly (re)initialized pages (MDEV-19738).

row_merge_write_redo(): Remove. We do not write MLOG_INDEX_LOAD
records any more. Instead, we write full redo log.

FlushObserver: Remove.

fseg_free_page_func(): Remove the parameter log. Redo logging
cannot be disabled.

fil_space_t::redo_skipped_count: Remove.

We cannot remove buf_block_t::skip_flush_check, because PageBulk
will temporarily generate invalid B-tree pages in the buffer pool.
This commit is contained in:
Marko Mäkelä
2020-02-11 18:44:26 +02:00
parent 8ccb3caafb
commit fc2f2fa853
46 changed files with 127 additions and 964 deletions
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4
mysql-test/suite/sys_vars/r/sysvars_innodb.result
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@@ -1259,10 +1259,10 @@ READ_ONLY YES
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_LOG_OPTIMIZE_DDL
SESSION_VALUE NULL
DEFAULT_VALUE ON
DEFAULT_VALUE OFF
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE BOOLEAN
VARIABLE_COMMENT Reduce redo logging when natively creating indexes or rebuilding tables. Setting this OFF avoids delay due to page flushing and allows concurrent backup.
VARIABLE_COMMENT Deprecated parameter with no effect.
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL