摘要：
一. X$表说明之前整理了一篇有关动态性能视图的blog：Oracle 动态性能视图http://blog.csdn.net/tianlesoftware/article/details/5863191Oracle 参数分类 和 参数的查看方法http://blog.csdn.net/tianlesoftware/article/details/5583655 The fixed X$tables are no real tables; you will not find them in any database schema. Thesevirtual tables provide a SQ 阅读全文
