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Historically, InnoDB split the redo log into at least 2 files. MDEV-12061 allowed the minimum to be innodb_log_files_in_group=1, but it kept the default at innodb_log_files_in_group=2. Because performance seems to be slightly better with only one log file, and because implementing an append-only variant of the log would require a single file, let us define the default to be 1, and have innodb_log_file_size=96M, to retain the same default total size.
19 lines
793 B
Plaintext
19 lines
793 B
Plaintext
#
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# Bug#19685095 DO NOT CARE ABOUT UNRESOLVED MLOG_FILE_NAME
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# IF THERE ARE NO OPERATIONS TO APPLY
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#
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SET GLOBAL DEBUG_DBUG='+d,fil_names_write_bogus';
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CREATE TABLE t1(a INT PRIMARY KEY) ENGINE=InnoDB;
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# Kill the server
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# restart: --debug=d,innodb_log_abort_1 --innodb-log-files-in-group=2 --innodb-log-file-size=4M
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Tablespace 4294967280 was not found at .*, but there were no modifications either/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_3,ib_log --innodb-log-files-in-group=2 --innodb-log-file-size=4M
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /srv_prepare_to_delete_redo_log_files: ib_log: MLOG_CHECKPOINT.* written/ in mysqld.1.err
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# restart
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# restart
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DROP TABLE t1;
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