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MDEV-11799 InnoDB can abort if the doublewrite buffer

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contains a bad and a good copy

Clean up the InnoDB doublewrite buffer code.

buf_dblwr_init_or_load_pages(): Do not add empty pages to the buffer.

buf_dblwr_process(): Do consider changes to pages that are all zero.
Do not abort when finding a corrupted copy of a page in the doublewrite
buffer, because there could be multiple copies in the doublewrite buffer,
and only one of them needs to be good.
This commit is contained in:
Marko Mäkelä
2017-01-15 14:20:16 +02:00
parent 9b99d9bebd
commit a9d00db155
14 changed files with 207 additions and 311 deletions
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1
mysql-test/suite/innodb/r/group_commit_crash.result
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@ -1,4 +1,3 @@
call mtr.add_suppression("InnoDB: Warning: database page corruption or a failed");
CREATE TABLE t1(a CHAR(255),
b CHAR(255),
c CHAR(255),