telegraf/plugins/inputs/procstat/README.md

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# Telegraf plugin: procstat
#### Description
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The procstat plugin can be used to monitor system resource usage by an
individual process using their /proc data.
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The plugin will tag processes by their PID and their process name.
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Processes can be specified either by pid file, by executable name, by command
line pattern matching, or by username (in this order or priority. Procstat
plugin will use `pgrep` when executable name is provided to obtain the pid.
Proctstas plugin will transmit IO, memory, cpu, file descriptor related
measurements for every process specified. A prefix can be set to isolate
individual process specific measurements.
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Example:
```
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[[inputs.procstat]]
exe = "influxd"
prefix = "influxd"
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[[inputs.procstat]]
pid_file = "/var/run/lxc/dnsmasq.pid"
```
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The above configuration would result in output like:
```
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> procstat,name="dnsmasq",pid="44979" cpu_user=0.14,cpu_system=0.07
> procstat,name="influxd",pid="34337" influxd_cpu_user=25.43,influxd_cpu_system=21.82
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```
# Measurements
Note: prefix can be set by the user, per process.
File descriptor related measurement names:
- procstat_[prefix_]num_fds value=4
Context switch related measurement names:
- procstat_[prefix_]voluntary_context_switches value=250
- procstat_[prefix_]involuntary_context_switches value=0
I/O related measurement names:
- procstat_[prefix_]read_count value=396
- procstat_[prefix_]write_count value=1
- procstat_[prefix_]read_bytes value=1019904
- procstat_[prefix_]write_bytes value=1
CPU related measurement names:
- procstat_[prefix_]cpu_user value=0
- procstat_[prefix_]cpu_system value=0.01
- procstat_[prefix_]cpu_idle value=0
- procstat_[prefix_]cpu_nice value=0
- procstat_[prefix_]cpu_iowait value=0
- procstat_[prefix_]cpu_irq value=0
- procstat_[prefix_]cpu_soft_irq value=0
- procstat_[prefix_]cpu_soft_steal value=0
- procstat_[prefix_]cpu_soft_stolen value=0
- procstat_[prefix_]cpu_soft_guest value=0
- procstat_[prefix_]cpu_soft_guest_nice value=0
Memory related measurement names:
- procstat_[prefix_]memory_rss value=1777664
- procstat_[prefix_]memory_vms value=24227840
- procstat_[prefix_]memory_swap value=282624