The library cache (a component of the shared pool) stores the executable (parsed or compiled) form of recently referenced SQL and PL/SQL code. Oracle tries to reuse this code.
- If the code has been executed previously and can be shared, Oracle will report a library cache hit.
- If Oracle is unable to use existing code, then a new executable version of the code must be built, which is known as a library cache miss.
本文转自maclean_007 51CTO博客，原文链接:http://blog.51cto.com/maclean/1277872
