The migration tool outputs the execution tracing in a shell window while the migration is in process.
迁移过程中，迁移工具输出执行，在shell窗口中追踪。
Diagnostic and audit logs very quickly become powerful tools for tracing the execution of running programs whether for debugging purposes or administration and monitoring purposes.
诊断和审计日志迅速成为跟踪运行程序执行的强大工具，不管是出于调试目的，还是出于管理和监视目的。
Because this tracing work is interleaved with program execution, the GC can lose track of certain objects that the application can "hide" through executing loads and stores.
由于这种跟踪工作与程序的执行是交叉进行的，应用程序通过执行加载或存储将某些对象“隐藏”，因此GC可能会丢失这些对象的跟踪。
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