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consistent:关于执行计划里recursive calls，db block gets和consistent gets参数的解释

我们在实际工作中经常要看某个sql语句的执行计划，例如: 在sqlplus使用命令SET AUTOTRACE _disibledevent=2>· Recursive Calls. Number of recursive calls generated at both the user and system level. Oracle Database maintains tables used for internal processing. When it needs to change these tables, Oracle Datab [阅读全文] [PDF]