1
drop table if exists t1;
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set global transaction_message_threshold=2000000;
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ERROR HY000: Variable 'transaction_message_threshold' is a read only variable
4
create table t1 (a int primary key);
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insert into t1 values (1),(2),(3);
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show create table data_dictionary.INNODB_REPLICATION_LOG;
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INNODB_REPLICATION_LOG CREATE TABLE `INNODB_REPLICATION_LOG` (
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`TRANSACTION_ID` BIGINT NOT NULL,
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`TRANSACTION_SEGMENT_ID` BIGINT NOT NULL,
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`COMMIT_ID` BIGINT NOT NULL,
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`END_TIMESTAMP` BIGINT NOT NULL,
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`TRANSACTION_MESSAGE_STRING` TEXT COLLATE utf8_general_ci NOT NULL,
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`TRANSACTION_LENGTH` BIGINT NOT NULL
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) ENGINE=FunctionEngine COLLATE = utf8_general_ci
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select count(*) >= 3 from data_dictionary.INNODB_REPLICATION_LOG;