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In the test, SET GLOBAL innodb_purge_rseg_truncate_frequency = 1 in order to ensure that everything is purged in the slow shutdown. This could be viewed as a flaw of the slow shutdown.
28 lines
732 B
Plaintext
28 lines
732 B
Plaintext
#
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# MDEV-12288 Reset DB_TRX_ID when the history is removed,
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# to speed up MVCC
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#
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SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
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CREATE TABLE t1(a INT PRIMARY KEY, b INT NOT NULL)
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ROW_FORMAT=REDUNDANT ENGINE=InnoDB;
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INSERT INTO t1 VALUES(1,2),(3,4);
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UPDATE t1 SET b=-3 WHERE a=3;
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SET GLOBAL innodb_fast_shutdown=0;
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Clustered index root page contents:
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N_RECS=2; LEVEL=0
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header=0x010000030087 (a=0x696e66696d756d00)
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header=0x0000100900a6 (a=0x80000001,
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DB_TRX_ID=0x000000000000,
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DB_ROLL_PTR=0x80000000000000,
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b=0x80000002)
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header=0x000018090074 (a=0x80000003,
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DB_TRX_ID=0x000000000000,
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DB_ROLL_PTR=0x80000000000000,
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b=0x7ffffffd)
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header=0x030008030000 (a=0x73757072656d756d00)
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SELECT * FROM t1;
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a b
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1 2
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3 -3
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DROP TABLE t1;
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