Question: Should the GODEBUG=madvdontneed=1 environment variable be set in a production environment? What impact does setting this parameter have on the operation of TiDB?

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Original topic: 请教一个问题：GODEBUG= madvdontneed=1环境变量，正式环境需要设置吗？设置了这个参数之后对TiDB的运行有啥影响吗？

| username: tracy0984

[TiDB Usage Environment] Production\Test Environment\POC
[TiDB Version] TiDB
[Encountered Problem] Optimizing TiDB
I would like to ask everyone a question: Does the GODEBUG=madvdontneed=1 environment variable need to be set in the production environment? What impact does setting this parameter have on the operation of TiDB?

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| username: ddhe9527 | Original post link

Consider adjusting TiDB settings if the memory is not large or if you have experienced OOM (Out of Memory) issues. It’s essentially trading CPU for memory.

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| username: buddyyuan | Original post link

What version are you using? The new version does not require any settings; the systemd service will call run_tidb.sh, and the script itself includes everything needed.

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| username: tracy0984 | Original post link

Got it, thanks, TiDB v5.3

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| username: tracy0984 | Original post link

Okay, thank you.

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| username: tracy0984 | Original post link

I confirmed that the run_tidb.sh script in version 5.3 also has this parameter set. So it is set by default. Thanks~~

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| username: system | Original post link

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