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fastdfs性能测试间歇性卡顿问题 #241

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inpilen opened this issue Oct 10, 2018 · 1 comment
Open

fastdfs性能测试间歇性卡顿问题 #241

inpilen opened this issue Oct 10, 2018 · 1 comment

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@inpilen
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inpilen commented Oct 10, 2018

部署单节点fastdfs后，单线程循环上传1万次1MB左右的文件，大约有9950次左右低于50ms毫秒以下，约有50次左右超过100ms，个别情况会有单次耗时500ms以上的问题。一万次上传，每次平均耗时约10ms。初步观察与网络无关。经抓包定位，该间隔是客户端发送文件最后一段数据之后，在storage返回文件名给客户端之间产生的较长耗时。客户端使用C++或使用java都进行过测试，均有此种间歇性卡顿问题。或是每次上传之间间隔50ms（相当于每秒写入20MB的数据，磁盘IO应该没问题），也会有这种现象，当上传间隔提升到1秒后，就不存在这种现象了。
@sjqzhang
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sjqzhang commented Feb 14, 2019 •
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同步期间流量会放大，磁盘忙不过来

@niceneo niceneo mentioned this issue Oct 9, 2024
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@sjqzhang @inpilen