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4c50120d14
Regretfully, the parameter innodb_log_checksums was introduced in MySQL 5.7.9 (the first GA release of that series) by mysql/mysql-server@af0acedd88 which partly replaced a parameter that had been introduced in 5.7.8 mysql/mysql-server@22ba38218e as innodb_log_checksum_algorithm. Given that the CRC-32C operations are accelerated on many processor implementations (AMD64 with SSE4.2; since MDEV-22669 also on IA-32 with SSE4.2, POWER 8 and later, ARMv8 with some extensions) and by lookup tables when only generic SISD instructions are available, there should be no valid reason to disable checksums. In MariaDB 10.5.2, as a preparation for MDEV-12353, MDEV-19543 deprecated and ignored the parameter innodb_log_checksums altogether. This should imply that after a clean shutdown with innodb_log_checksums=OFF one cannot upgrade to MariaDB Server 10.5 at all. Due to these problems, let us deprecate the parameter innodb_log_checksums and honor it only during server startup. The command SET GLOBAL innodb_log_checksums will always set the parameter to ON.
45 lines
1.4 KiB
Plaintext
45 lines
1.4 KiB
Plaintext
SET @orig = @@global.innodb_log_checksums;
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SELECT @orig;
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@orig
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1
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SET GLOBAL innodb_log_checksums = 'crc32';
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ERROR 42000: Variable 'innodb_log_checksums' can't be set to the value of 'crc32'
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET GLOBAL innodb_log_checksums = 2;
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ERROR 42000: Variable 'innodb_log_checksums' can't be set to the value of '2'
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET GLOBAL innodb_log_checksums = 1e2;
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ERROR 42000: Incorrect argument type to variable 'innodb_log_checksums'
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET GLOBAL innodb_log_checksums = 1.0;
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ERROR 42000: Incorrect argument type to variable 'innodb_log_checksums'
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET innodb_log_checksums = OFF;
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ERROR HY000: Variable 'innodb_log_checksums' is a GLOBAL variable and should be set with SET GLOBAL
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET GLOBAL innodb_log_checksums = OFF;
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Warnings:
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Warning 138 innodb_log_checksums is deprecated and has no effect outside recovery
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET GLOBAL innodb_log_checksums = default;
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SET GLOBAL innodb_log_checksums = ON;
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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SET GLOBAL innodb_log_checksums = @orig;
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SELECT @@global.innodb_log_checksums;
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@@global.innodb_log_checksums
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1
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