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内存

Memory 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。

配置

成功安装 DataKit 并启动后，会默认开启 Memory 采集器，无需手动开启。

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。

可通过 ConfigMap 方式注入采集器配置 或 配置 ENV_DATAKIT_INPUTS 开启采集器。

也支持以环境变量的方式修改配置参数（需要在 ENV_DEFAULT_ENABLED_INPUTS 中加为默认采集器）：

  • ENV_INPUT_MEM_INTERVAL

    采集器重复间隔时长

    字段类型: Duration

    采集器配置字段: interval

    默认值: 10s

  • ENV_INPUT_MEM_TAGS

    自定义标签。如果配置文件有同名标签，将会覆盖它

    字段类型: Map

    采集器配置字段: tags

    示例: tag1=value1,tag2=value2

指标

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
Tag Description
host System hostname.
  • 指标列表
Metric Description Type Unit
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 high memory. (Linux) int B
high_total Total amount of high memory. (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 low memory. (Linux) int B
low_total Total amount of low memory. (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 write back buffers. (Linux) int B

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