一种不错的做法是，从512 MB开始，然后逐步向上或向下，以确定最优值、测定吞吐量或响应时间，并分析gc日志，以了解进行清除操作的频率及时间。
A good starting point would be 512mb, then move up or down to determine optimal value, measure throughput or response times, and analyze GC logs to understand frequency and length of scavenges.
相反，推断源测定有意和偶然操作，并且产生性能数据。
In contrast, inferential sources measure a deliberate or incidental action, and performance data is derived from it.
对于推断pds，收集器用于执行和测定底层操作。
In the case of an inferential PDS, the collector executes and measures the underlying action.
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