2022-07-15 22:37:32 +08:00
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# heapdump
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2019-09-03 16:46:52 +08:00
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2020-08-07 18:28:00 +08:00
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[`heapdump`在线教程](https://arthas.aliyun.com/doc/arthas-tutorials.html?language=cn&id=command-heapdump)
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2020-08-07 17:50:16 +08:00
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2022-07-15 22:37:32 +08:00
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::: tip
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dump java heap, 类似 jmap 命令的 heap dump 功能。
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:::
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2019-09-03 16:46:52 +08:00
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2022-08-09 18:42:39 +08:00
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## 使用参考
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2019-09-03 16:46:52 +08:00
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2022-08-09 18:42:39 +08:00
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### dump 到指定文件
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2019-09-03 16:46:52 +08:00
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```bash
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2023-04-19 15:22:33 +08:00
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[arthas@58205]$ heapdump arthas-output/dump.hprof
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Dumping heap to arthas-output/dump.hprof ...
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2019-09-03 16:46:52 +08:00
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Heap dump file created
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```
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2023-04-19 15:35:06 +08:00
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::: tip
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生成文件在`arthas-output`目录，可以通过浏览器下载： http://localhost:8563/arthas-output/
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:::
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2023-04-19 19:32:31 +08:00
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2022-08-09 18:42:39 +08:00
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### 只 dump live 对象
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2019-09-03 16:46:52 +08:00
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```bash
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2023-04-19 15:35:06 +08:00
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[arthas@58205]$ heapdump --live /tmp/dump.hprof
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Dumping heap to /tmp/dump.hprof ...
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2019-09-03 16:46:52 +08:00
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Heap dump file created
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```
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2022-08-09 18:42:39 +08:00
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## dump 到临时文件
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2019-09-03 16:46:52 +08:00
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```bash
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[arthas@58205]$ heapdump
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Dumping heap to /var/folders/my/wy7c9w9j5732xbkcyt1mb4g40000gp/T/heapdump2019-09-03-16-385121018449645518991.hprof...
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Heap dump file created
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```
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