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613e9e7d4d
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.
102 lines
3.9 KiB
Plaintext
102 lines
3.9 KiB
Plaintext
CREATE TABLE t1(a INT PRIMARY KEY) ENGINE=InnoDB;
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# restart: --innodb-thread-concurrency=1 --innodb-log-file-size=2m
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SELECT * FROM INFORMATION_SCHEMA.ENGINES
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WHERE engine = 'innodb'
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AND support IN ('YES', 'DEFAULT', 'ENABLED');
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ENGINE SUPPORT COMMENT TRANSACTIONS XA SAVEPOINTS
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InnoDB YES Supports transactions, row-level locking, foreign keys and encryption for tables YES YES YES
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NOT FOUND /InnoDB: Log file .*ib_logfile1 is of different size .* bytes than other log files 0 bytes!/ in mysqld.1.err
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# restart: --innodb-thread-concurrency=1 --innodb-log-file-size=2m
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CHECK TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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# restart: --innodb-thread-concurrency=100 --innodb-log-file-size=20M
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BEGIN;
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INSERT INTO t1 VALUES (42);
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# restart: --innodb-log-file-size=12M
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SELECT * FROM t1;
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a
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INSERT INTO t1 VALUES (42);
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BEGIN;
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DELETE FROM t1;
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# restart: --innodb-log-files-in-group=3 --innodb-log-file-size=5M
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SELECT * FROM t1;
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a
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42
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INSERT INTO t1 VALUES (0),(123);
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BEGIN;
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DELETE FROM t1 WHERE a>0;
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# Persist the state of the above incomplete transaction by
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# causing a redo log write for another transaction.
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connect con1, localhost, root;
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SET GLOBAL innodb_flush_log_at_trx_commit=1;
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DELETE FROM t1 WHERE a=0;
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disconnect con1;
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connection default;
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# Kill the server
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# restart: --innodb-log-group-home-dir=foo\;bar
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /syntax error in innodb_log_group_home_dir/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_1
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Starting crash recovery from checkpoint LSN=.*/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_3
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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# restart: --innodb-read-only
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: innodb_read_only prevents crash recovery/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_4
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 2 /redo log from 3\*[0-9]+ to 1\*[0-9]+ bytes/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_5
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 3 /redo log from 3\*[0-9]+ to 1\*[0-9]+ bytes/ in mysqld.1.err
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# restart: --innodb-read-only
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 2 /InnoDB: innodb_read_only prevents crash recovery/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_6
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 4 /redo log from 3\*[0-9]+ to 1\*[0-9]+ bytes/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_7
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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# restart: --innodb-read-only
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Cannot create log files in read-only mode/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_8
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Setting log file .*ib_logfile[0-9]+ size to/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_9
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Setting log file .*ib_logfile[0-9]+ size to/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_9
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Log file .*ib_logfile0 size 7 is not a multiple of 512 bytes/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_9
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Log file .*ib_logfile1 is of different size 1048576 bytes than other log files/ in mysqld.1.err
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# restart: --debug=d,innodb_log_abort_10
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SELECT * FROM t1;
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ERROR 42000: Unknown storage engine 'InnoDB'
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FOUND 1 /InnoDB: Setting log file .*ib_logfile[0-9]+ size to/ in mysqld.1.err
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FOUND 1 /InnoDB: Renaming log file .*ib_logfile101 to .*ib_logfile0/ in mysqld.1.err
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# restart
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SELECT * FROM t1;
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a
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42
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123
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DROP TABLE t1;
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