telegraf/plugins/inputs/internal/README.md

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# Internal Input Plugin
The `internal` plugin collects metrics about the telegraf agent itself.
Note that some metrics are aggregates across all instances of one type of
plugin.
### Configuration:
```toml
# Collect statistics about itself
[[inputs.internal]]
## If true, collect telegraf memory stats.
# collect_memstats = true
```
### Measurements & Fields:
memstats are taken from the Go runtime: https://golang.org/pkg/runtime/#MemStats
- internal\_memstats
- alloc\_bytes
- frees
- heap\_alloc\_bytes
- heap\_idle\_bytes
- heap\_in\_use\_bytes
- heap\_objects\_bytes
- heap\_released\_bytes
- heap\_sys\_bytes
- mallocs
- num\_gc
- pointer\_lookups
- sys\_bytes
- total\_alloc\_bytes
agent stats collect aggregate stats on all telegraf plugins.
- internal\_agent
- gather\_errors
- metrics\_dropped
- metrics\_gathered
- metrics\_written
internal\_gather stats collect aggregate stats on all input plugins
that are of the same input type. They are tagged with `input=<plugin_name>`.
- internal\_gather
- gather\_time\_ns
- metrics\_gathered
internal\_write stats collect aggregate stats on all output plugins
that are of the same input type. They are tagged with `output=<plugin_name>`.
- internal\_write
- buffer\_limit
- buffer\_size
- metrics\_written
- metrics\_filtered
- write\_time\_ns
internal\_\<plugin\_name\> are metrics which are defined on a per-plugin basis, and
usually contain tags which differentiate each instance of a particular type of
plugin.
- internal\_\<plugin\_name\>
- individual plugin-specific fields, such as requests counts.
### Tags:
All measurements for specific plugins are tagged with information relevant
to each particular plugin.
### Example Output:
```
internal_memstats,host=tyrion alloc_bytes=4457408i,sys_bytes=10590456i,pointer_lookups=7i,mallocs=17642i,frees=7473i,heap_sys_bytes=6848512i,heap_idle_bytes=1368064i,heap_in_use_bytes=5480448i,heap_released_bytes=0i,total_alloc_bytes=6875560i,heap_alloc_bytes=4457408i,heap_objects_bytes=10169i,num_gc=2i 1480682800000000000
internal_agent,host=tyrion metrics_written=18i,metrics_dropped=0i,metrics_gathered=19i,gather_errors=0i 1480682800000000000
internal_write,output=file,host=tyrion buffer_limit=10000i,write_time_ns=636609i,metrics_written=18i,buffer_size=0i 1480682800000000000
internal_gather,input=internal,host=tyrion metrics_gathered=19i,gather_time_ns=442114i 1480682800000000000
internal_gather,input=http_listener,host=tyrion metrics_gathered=0i,gather_time_ns=167285i 1480682800000000000
internal_http_listener,address=:8186,host=tyrion queries_received=0i,writes_received=0i,requests_received=0i,buffers_created=0i,requests_served=0i,pings_received=0i,bytes_received=0i,not_founds_served=0i,pings_served=0i,queries_served=0i,writes_served=0i 1480682800000000000
```