[MySQL - Online DDL] part 2. 실습

Online DDL 작업 정보 계측 memory ※ 사전 조건 performance_schema=ON MariaDB [(none)]> show variables like 'performance_schema'; +--------------------+-------+ | Variable_name | Value | +--------------------+-------+ | performance_schema | ON | +--------------------+-------+ Performance_schmea.setup_instruments 조회 mysql> select substring_index(name,'/',1) as cate, count(*) as cnt from performance_schema.s.....