doc/admin-guide/plugins/system_stats.en.rst

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   to you under the Apache License, Version 2.0 (the
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.. include:: ../../common.defs

.. _admin-plugins-system_stats:

System Stats Plugin
********************

Purpose
=======

This plugin inserts system statistics in to the stats list that can then be
retrieved either with stats_over_http or any other method using the management port.
These can be used to diagnose issues like excessive load or networking performance.

Installation
============

To enable this plugin, build with experimental plugin support add to the :file:`plugin.config` file::

    system_stats.so

Caveats
=======

This plugin depends greatly on the sysfs interface so it is mostly useful only for Linux hosts, however
it will build for other hosts.

Examples
========

Some example output is:

.. code::

	"proxy.process.ssl.cipher.user_agent.DES-CBC3-SHA": 0,
	"proxy.process.ssl.cipher.user_agent.PSK-3DES-EDE-CBC-SHA": 0,
	"plugin.system_stats.loadavg.one": 136128,
	"plugin.system_stats.loadavg.five": 132032,
	"plugin.system_stats.loadavg.ten": 88864,
	"plugin.system_stats.current_processes": 503,
	"plugin.system_stats.total_ram": 4127707136,
	"plugin.system_stats.free_ram": 93474816,
	"plugin.system_stats.shared_ram": 430710784,
	"plugin.system_stats.buffer_ram": 399872000,
	"plugin.system_stats.total_swap": 0,
	"plugin.system_stats.free_swap": 0,
	"plugin.system_stats.net.enp0s3.speed": 1000,
	"plugin.system_stats.net.enp0s3.collisions": 0,
	"plugin.system_stats.net.enp0s3.multicast": 0,
	"plugin.system_stats.net.enp0s3.rx_bytes": 6783959,
	"plugin.system_stats.net.enp0s3.rx_compressed": 0,
	"plugin.system_stats.net.enp0s3.rx_crc_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_dropped": 0,
	"plugin.system_stats.net.enp0s3.rx_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_fifo_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_frame_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_length_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_missed_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_nohandler": 0,
	"plugin.system_stats.net.enp0s3.rx_over_errors": 0,
	"plugin.system_stats.net.enp0s3.rx_packets": 9119,
	"plugin.system_stats.net.enp0s3.tx_aborted_errors": 0,
	"plugin.system_stats.net.enp0s3.tx_bytes": 922054,
	"plugin.system_stats.net.enp0s3.tx_carrier_errors": 0,
	"plugin.system_stats.net.enp0s3.tx_compressed": 0,
	"plugin.system_stats.net.enp0s3.tx_dropped": 0,
	"plugin.system_stats.net.enp0s3.tx_errors": 0,
	"plugin.system_stats.net.enp0s3.tx_fifo_errors": 0,
	"plugin.system_stats.net.enp0s3.tx_heartbeat_errors": 0,
	"plugin.system_stats.net.enp0s3.tx_packets": 6013,
	"plugin.system_stats.net.enp0s3.tx_window_errors": 0,
	"proxy.process.cache.volume_0.bytes_used": 0,
	"proxy.process.cache.volume_0.bytes_total": 268066816,

This shows the system statistics inserted in with other stats. The above output
displays the current load average, number of processes, and information on any network interfaces.

This data is only updated every five seconds to not create large overhead.