释放更多内存。
如果这种尝试仍然不能释放足够的资源，JVM将从操作系统获取更多的内存，直至达到允许的最大极限。
If this attempt still doesn't free enough resources, then the JVM will obtain more memory from the operating system until it finally reaches the maximum allowed.
Purify还可以报告内存泄漏——比如，当一个程序在丢失内存跟踪之前不能释放一个或者更多的内存板块时。
Purify also reports memory leaks — i.e., when a program fails to release one or more blocks of memory before losing track of the memory.
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