java c3p0 OutOfMemoryError PermGen空间

大家好，我要面对这个问题。我设置PermGen空间大小为512M 它仍然是OutOfMemoryError。 谁能帮我谢谢

Exception in thread "com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0" java.lang.OutOfMemoryError: PermGen space
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
    at java.lang.Class.getMethod0(Class.java:2670)
    at java.lang.Class.getMethod0(Class.java:2679)
    at java.lang.Class.getMethod(Class.java:1603)
    at com.mchange.v2.c3p0.impl.C3P0ImplUtils.supportsMethod(C3P0ImplUtils.java:309)
    at com.mchange.v2.c3p0.impl.NewPooledConnection.<init>(NewPooledConnection.java:104)
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection    (WrapperConnectionPoolDataSource.java:198)
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
    at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
    at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)

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如果你在.getConnection上安装了PermGen OOM，你就有一个严重的资源泄漏，你应该查找或发布代码让我们看到，或者你的连接池太大了……你是使用应用程序容器，例如Tomcat，还是它是独立的应用程序？