Go 碰到的内存问题

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通过 linux top 查看到程序占用了 1.8G 内存，但使用 go tool pprof 查看到的只有几 M

go tool  pprof  http://localhost:6060/debug/pprof/heap

(pprof) top
Showing nodes accounting for 1.78MB, 100% of 1.78MB total
      flat  flat%   sum%        cum   cum%
    1.78MB   100%   100%     1.78MB   100%  github.com/mozillazg/go-pinyin.init /root/local/go/src/github.com/mozillazg/go-pinyin/pinyin_dict.go
         0     0%   100%     1.78MB   100%  _/root/projections/rpc/gox.init <autogenerated>
         0     0%   100%     1.78MB   100%  main.init <autogenerated>
         0     0%   100%     1.78MB   100%  runtime.main /root/go/src/runtime/proc.go
(pprof)

5 replies • 2018-02-06 17:25:33 +08:00

htfy96

Feb 6, 2018

Go 的 virt 占用大是正常的，res 比较接近实际

Morriaty

Feb 6, 2018

@htfy96 就是 res=1.8G

Morriaty

Feb 6, 2018

找到答案了，分享一下
https://groups.google.com/forum/#!topic/golang-nuts/eEGrfc7taU0

cloudzhou

Feb 6, 2018

问题是什么呢

Morriaty

Feb 6, 2018

@cloudzhou 问题比较具体，不太好说

如果碰到相似情况，可以参考 google forum 那篇，是具体解释 pprof/heap 里的字段含义

还有这篇，具体讲 profile 过程
https://github.com/bradfitz/talk-yapc-asia-2015/blob/master/talk.md