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将命令的结果完整保存在日志文件中，便于后续进行分析
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- 默认情况下，该功能是关闭的，如果需要开启，请执行以下命令：
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`options save-result true`{{execute T2}}
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```bash
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$ options save-result true
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NAME BEFORE-VALUE AFTER-VALUE
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----------------------------------------
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save-result false true
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Affect(row-cnt:1) cost in 3 ms.
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```
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看到上面的输出，即表示成功开启该功能；
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- 日志文件路径
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结果会异步保存在：`{user.home}/logs/arthas-cache/result.log`，请定期进行清理，以免占据磁盘空间
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## 使用新版本Arthas的异步后台任务将结果存日志文件
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```bash
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$ trace Test t >> &
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job id : 2
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cache location : /Users/admin/logs/arthas-cache/28198/2
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```
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此时命令会在后台异步执行，并将结果异步保存在文件（~/logs/arthas-cache/${PID}/${JobId}）中；
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- 此时任务的执行不受session断开的影响；任务默认超时时间是1天，可以通过全局 `options` 命令修改默认超时时间；
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- 此命令的结果将异步输出到文件中；此时不管 `save-result` 是否为true，都不会再往~/logs/arthas-cache/result.log 中异步写结果
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