Memory¶
Mem collector is used to collect system memory information, some general metrics such as total memory, used memory and so on.
Configuration¶
After successfully installing and starting DataKit, the Mem collector will be enabled by default without the need for manual activation.
Collector Configuration¶
Go to the conf.d/host
directory under the DataKit installation directory, copy mem.conf.sample
and name it mem.conf
. Examples are as follows:
[[inputs.mem]]
##(optional) collect interval, default is 10 seconds
interval = '10s'
[inputs.mem.tags]
# some_tag = "some_value"
# more_tag = "some_other_value"
Once configured, restart DataKit.
Can be turned on by ConfigMap Injection Collector Configuration or Config ENV_DATAKIT_INPUTS .
Can also be turned on by environment variables, (needs to be added as the default collector in ENV_DEFAULT_ENABLED_INPUTS):
-
ENV_INPUT_MEM_INTERVAL
Collect interval
Type: TimeDuration
input.conf:
interval
Default: 10s
-
ENV_INPUT_MEM_TAGS
Customize tags. If there is a tag with the same name in the configuration file, it will be overwritten
Type: Map
input.conf:
tags
Example: tag1=value1,tag2=value2
Metric¶
For all of the following data collections, a global tag named host
is appended by default (the tag value is the host name of the DataKit), or other tags can be specified in the configuration by [inputs.mem.tags]
:
mem
¶
- tag
Tag | Description |
---|---|
host |
System hostname. |
- metric list
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 |