mariadb/storage/innobase/mtr
Marko Mäkelä b82abc7163 MDEV-35701 trx_t::autoinc_locks causes unnecessary dynamic memory allocation
trx_t::autoinc_locks: Use small_vector<lock_t*,4> in order to avoid any
dynamic memory allocation in the most common case (a statement is
holding AUTO_INCREMENT locks on at most 4 tables or partitions).

lock_cancel_waiting_and_release(): Instead of removing elements from
the middle, simply assign nullptr, like lock_table_remove_autoinc_lock().

The added test innodb.auto_increment_lock_mode covers the dynamic memory
allocation as well as nondeterministically (occasionally) covers
the out-of-order lock release in lock_table_remove_autoinc_lock().

Reviewed by: Debarun Banerjee
2025-01-15 16:55:01 +02:00
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mtr0mtr.cc MDEV-35701 trx_t::autoinc_locks causes unnecessary dynamic memory allocation 2025-01-15 16:55:01 +02:00