MySQL 8.0 参考手册 / 第 28 章 MySQL 系统模式 / 28.4 sys 模式对象参考 / 28.4.5 sys 模式存储函数 /
26.4.5.12 ps_is_instrument_default_timed() 函数
返回YES
或NO
指示给定的 Performance Schema 工具是否默认计时。
mysql> SELECT sys.ps_is_instrument_default_timed('memory/innodb/row_log_buf');
+-----------------------------------------------------------------+
| sys.ps_is_instrument_default_timed('memory/innodb/row_log_buf') |
+-----------------------------------------------------------------+
| NO |
+-----------------------------------------------------------------+
mysql> SELECT sys.ps_is_instrument_default_timed('statement/sql/alter_user');
+----------------------------------------------------------------+
| sys.ps_is_instrument_default_timed('statement/sql/alter_user') |
+----------------------------------------------------------------+
| YES |
+----------------------------------------------------------------+