内存

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mem 采集器用于收集系统内存信息，一些通用的指标如主机总内存、用的内存、已使用的内存等

前置条件

暂无

配置

主机安装Kubernetes

进入 DataKit 安装目录下的 conf.d/host 目录，复制 mem.conf.sample 并命名为 mem.conf。示例如下：

[[inputs.mem]]
  ##(optional) collect interval, default is 10 seconds
  interval = '10s'

[inputs.mem.tags]
  # some_tag = "some_value"
  # more_tag = "some_other_value"

配置好后，重启 DataKit 即可。

支持以环境变量的方式修改配置参数：

环境变量名	对应的配置参数项	参数示例
ENV_INPUT_MEM_TAGS	tags	tag1=value1,tag2=value2 如果配置文件中有同名 tag，会覆盖它
ENV_INPUT_MEM_INTERVAL	interval	10s

指标集

以下所有数据采集，默认会追加名为 host 的全局 tag（tag 值为 DataKit 所在主机名），也可以在配置中通过 [inputs.mem.tags] 指定其它标签：

 [inputs.mem.tags]
  # some_tag = "some_value"
  # more_tag = "some_other_value"
  # ...

mem

• 标签

标签名	描述
host	主机名

• 指标列表

指标	描述	数据类型	单位
active	Memory that has been used more recently and usually not reclaimed unless absolutely necessary. (Darwin, Linux)	int	B
available	Amount of available memory	int	B
available_percent	Available memory percent	float	percent
buffered	buffered (Linux)	int	B
cached	In-memory cache for files read from the disk. (Linux)	int	B
commit_limit	This is the total amount of memory currently available to be allocated on the system. (Linux)	int	B
committed_as	The amount of memory presently allocated on the system. (Linux)	int	B
dirty	Memory which is waiting to get written back to the disk. (Linux)	int	B
free	Amount of free memory(Darwin, Linux)	int	B
high_free	Amount of free highmem. (Linux)	int	B
high_total	Total amount of highmem. (Linux)	int	B
huge_page_total	The size of the pool of huge pages. (Linux)	int	count
huge_pages_free	The number of huge pages in the pool that are not yet allocated. (Linux)	int	count
huge_pages_size	The size of huge pages. (Linux)	int	B
inactive	Memory which has been less recently used. It is more eligible to be reclaimed for other purposes. (Darwin, Linux)	int	B
low_free	Amount of free lowmem. (Linux)	int	B
low_total	Total amount of lowmem. (Linux)	int	B
mapped	Files which have been mapped into memory, such as libraries. (Linux)	int	B
page_tables	Amount of memory dedicated to the lowest level of page tables. (Linux)	int	B
shared	Amount of shared memory (Linux)	int	B
slab	In-kernel data structures cache. (Linux)	int	B
sreclaimable	Part of Slab, that might be reclaimed, such as caches. (Linux)	int	B
sunreclaim	Part of Slab, that cannot be reclaimed on memory pressure. (Linux)	int	B
swap_cached	Memory that once was swapped out, is swapped back in but still also is in the swap file. (Linux)	int	B
swap_free	Amount of swap space that is currently unused. (Linux)	int	B
swap_total	Total amount of swap space available. (Linux)	int	B
total	Total amount of memory	int	B
used	Amount of used memory	int	B
used_percent	Used memory percent	float	percent
vmalloc_chunk	Largest contiguous block of vmalloc area which is free. (Linux)	int	B
vmalloc_total	Total size of vmalloc memory area. (Linux)	int	B
vmalloc_used	Amount of vmalloc area which is used. (Linux)	int	B
wired	wired (Darwin)	int	B
write_back	Memory which is actively being written back to the disk. (Linux)	int	B
write_back_tmp	Memory used by FUSE for temporary writeback buffers. (Linux)	int	B