Question

我知道,我有一份申请,即:System.gc(或Runtime.gc(。我通过使用<条码>-XX:+可转让的GC和全部GCs消失,对此进行了核实。

我检查了该守则,似乎没有发现任何电话的<编码>System.gc(或Runtime.gc()。它是一个大型项目,因此我有可能错失,或者在一些图书馆被叫去。

例:

-Xtrace:trigger=method{java/lang/System.gc,javadump}

是否有可能与Oracle JRE做同样的事,帮助找到被称作“谁? 我没有能力用破碎的方式来处理这个问题。

此外,我知道,它不是NIO,也不是RMI,而是这些GC电话。

Answer 1

You could try using AOP to define an @Before pointcut for those methods, then create an Exception object and either throw it or log/mail it s stacktrace. Note that you could inspect the stacktrace to only take action on relevant cases (i.e. experiment a bit locally to figure out what a normal non-explicit stacktrace might look like).

Answer 2

你可以:

profile the application with e.g. jProfiler, then you can search through the collected trace to find the System.gc() calls.
collect thread dumps in the time when you expect a Full GC to occur, this could show you the stack trace triggering the System GC.

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