休眠属性
谁能解释一下这两个属性
Q1。 hibernate.cglib.use_reflection_optimizer ？设置为true和false的效果是什么
Q2. hibernate.c3p0.max_statements 。我阅读了 hibernate 文档 https://www.hibernate.org/214.html。它只提到默认值是0。我使用的是oracle10g，我设置为100。但我想知道如何找出最大数据库可以支持多少？这个属性是否意味着sql语句可以支持的最大长度？
can anyone explain on this 2 properties
Q1. hibernate.cglib.use_reflection_optimizer ? what is the effect of setting to true and false
Q2. hibernate.c3p0.max_statements . i read hibernate doc https://www.hibernate.org/214.html. it only mentioned default value is 0. I am using oracle10g, and i set to 100. but i want to know how to find out what is the max database can support? also dose this property mean max length of sql statement can support?
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A1.
false将使 Hibernate 启动更快，因为它不会尝试构建 cglib 增强对象来访问 getter/setter，并使用标准 JDK 反射进行访问。不过，它可能会对整体运行时性能产生一些负面影响。而值true的含义恰恰相反。参考：https://www.hibernate.org/194.html
A2 .是c3p0的PreparedStatement缓存的大小。零表示语句缓存已关闭。
从您的评论看来，您仍然不清楚
PreparedStatement的 c3p0 的大小。我认为你应该阅读PreparedStatement，然后你就能理解了。从文档，
因此，这意味着它会缓存
PreparedStatement对象。在这种情况下，底层数据库并不重要。A1.
falsewill make Hibernate start faster since it does not try to build cglib-enhanced objects to access getter/setters, and use standard JDK reflection for access. It might have some negative impact on overall runtime performance, though. And the valuetruemeans just the opposite.Refer to: https://www.hibernate.org/194.html
A2. It is the size of c3p0's PreparedStatement cache. Zero means statement caching is turned off.
As it seems from your comments, you are still not clear about the size of c3p0 for
PreparedStatement. I think you should read onPreparedStatement, then you will be able to understand.From the docs,
So, that means it caches the
PreparedStatementobjects. Underlying database doesn't matter in this case.