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node_exporter 内存信息 存在过时 的 node_memory_MemAvailable_bytes key #72

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Ansen opened this issue Nov 16, 2020 · 2 comments
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node_exporter 内存信息 存在过时 的 node_memory_MemAvailable_bytes key #72

Ansen opened this issue Nov 16, 2020 · 2 comments

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@Ansen
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Ansen commented Nov 16, 2020 •
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部分系统(我这只发现ubuntu 1404)已经不再支持 node_memory_MemAvailable_bytes 了，导致可用内存、已用内存、内存使用率不不显示

需要将 node_memory_MemAvailable_bytes 更新为 node_memory_MemFree_bytes
@Ansen
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Ansen commented Nov 16, 2020

根据官方 issuse 支持 MemAvailable 参数的最低内核版本为 3.1.4，而Linux中，严格来说：可用内存= free + buff + cache， 但是 buff 是块设备的缓冲，所以建议将 MemAvailable 配置为 ：free+cache,即：node_memory_MemFree_bytes + node_memory_Cached_bytes

@starsliao
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Duplicate of #18

@starsliao starsliao marked this as a duplicate of #18 Nov 22, 2020
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@Ansen @starsliao