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d7a2401750
Due to a data corruption bug that may have occurred a long time earlier
(possibly involving physical backup and MySQL Bug #69122, which was
addressed in commit f166ec71b7)
it seems possible that the InnoDB change buffer might end up containing
entries, while no buffered changes exist according to the change buffer
bitmap pages in the .ibd files.
ibuf_delete_recs(): New function, to be invoked on slow shutdown only.
Remove all buffered changes for a specific page.
ibuf_merge_or_delete_for_page(): If the change buffer bitmap is clean
and a slow shutdown is in progress, invoke ibuf_delete_recs().
We do not want to do that during normal operation, due to the additional
overhead that is involved. The bitmap page should be consistent with
the change buffer in the first place.
27 lines
835 B
Plaintext
27 lines
835 B
Plaintext
CREATE TABLE t1(
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a INT AUTO_INCREMENT PRIMARY KEY,
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b CHAR(1),
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c INT,
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INDEX(b))
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ENGINE=InnoDB STATS_PERSISTENT=0;
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SET GLOBAL innodb_change_buffering_debug = 1;
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INSERT INTO t1 VALUES(0,'x',1);
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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INSERT INTO t1 SELECT 0,b,c FROM t1;
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check Warning InnoDB: Index 'b' contains #### entries, should be 4096.
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test.t1 check error Corrupt
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SET GLOBAL innodb_fast_shutdown=0;
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DROP TABLE t1;
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