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block-cache 这个参数的理解 #1090

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isoleo opened this issue Sep 29, 2021 · 3 comments
Closed

block-cache 这个参数的理解 #1090

isoleo opened this issue Sep 29, 2021 · 3 comments
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configuration how to set configuration in best practice

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@isoleo
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isoleo commented Sep 29, 2021

block-cache 在配制文件里这个配制是8M。但是在wiki 里并没有看到这个参数 的解释。
这个参数调整前，数据量250G，内存只用了不到10G 。把这个参数调整大后，内存迅速就上来了。
可是io 并没有下来，依旧在90%以上甚至比调大之前的io压力更大。
这个参数是怎么理解呢？_
@leonjxchen
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这个值，你直接看rocksdb的文档可能更好

@kernelai
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kernelai commented Oct 8, 2021

这个值，你直接看rocksdb的文档可能更好

是的。这个就是rocksdb 的参数暴露。pika并未做任何优化。

@huadaonan
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这个要顶一下 很多内存暴涨问题来自这个参数的错误设定

@AlexStocks AlexStocks added the configuration how to set configuration in best practice label Apr 10, 2023
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@huadaonan @kernelai @AlexStocks @isoleo @leonjxchen