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mariadb/mysql-test/suite/innodb/t/foreign_key.combinations
Marko Mäkelä 90f43d260e MDEV-24101 innodb_random_read_ahead=ON causes hang on DDL or shutdown
buf_read_ahead_random(): Do not leak a tablespace reference.
The reference was already acquired in fil_space_t::get(),
and we must only check that operations were not stopped.

This error was introduced when
commit 118e258aaac5da75a2ac4556201aaea3688fac67
merged n_pending_ios, n_pending_ops into a single n_pending.

This was not noticed earlier, because innodb_random_read_ahead
is OFF by default and our regression tests did not vary that
parameter at all.
2020-11-03 12:41:41 +02:00

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[read-ahead]
--innodb-random-read-ahead=ON
[normal]
--innodb-random-read-ahead=OFF