Locked ownable synchronizers An ownable synchronizer is a synchronizer that may be exclusively owned by a thread and uses AbstractOwnableSynchronizer (or its subclass) to implement its synchronization property. ReentrantLock and ReentrantReadWriteLock are two examples of ownable synchronizers provided by the platform.
http://stackoverflow.com/questions/41300520/what-is-locked-ownable-synchronizers-in-thread-dump
MySQL分区表, partition 没有分区的表创建分区 partition management on a not partitioned table is not possible 1 2 3 4 5 6 7 ALTER TABLE table0 PARTITION BY RANGE (to_days(field0)) ( PARTITION p201908 VALUES less THAN (737668), PARTITION p201909 VALUES LESS THAN (737698), PARTITION p201910 VALUES LESS THAN (737729), PARTITION p201911 VALUES LESS THAN (737759), PARTITION