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→Reading: fixed a typo
{{UBC toc}}
{{DISPLAYTITLE:/proc/user_beancounters}}
The proc filesystem entry showing resource control information is <code>/proc/user_beancounters</code> file. An example content of <code>/proc/user_beancounters</code> is shown below.
<pre>
# cat /proc/user_beancounters
numiptent 10 16 128 128 0
</pre>
== Fields ==
The field '''<code>uid</code>''' is a numeric identifier of the container<ref>The name “uid” is related to the fact that OpenVZ Resource Management can be used without virtualization and containers.</ref>.
For accountable parameters, the field '''<code>held</code>''' shows the current counter for the container (resource “usage”), and the field '''<code>maxheld</code>''' shows the counter's maximum for the last accounting period. The accounting period is usually the lifetime of the container<ref>The lifetime of a container is the period from the start of the container till the time all processes in the container exited and all resources used by these processes are freed. Usually, the lifetime is just the time between the start and the stop of the container.</ref>.
The field '''<code>failcnt</code>''' shows the number of refused “resource allocations” for the whole lifetime of the process group.
The '''<code>barrier</code>''' and '''<code>limit</code>''' fields are resource control settings. For some
parameters, only one of them may be used, for some parameters — both.
These fields may specify limits or guarantees, and the exact meaning of
them is parameter-specific. Description of each parameter in [[UBC parameters]]
contains information about the difference between the <code>barrier</code> and
the <code>limit</code> for the parameter.
== Units ==
{{Main|UBC parameter units}}
== Settings ==
General notes about parameters and their barrier and limit settings
are provided in [[UBC parameters]]. Parameters not having limit setting have
[[LONG_MAX]] in the corresponding field.
== Reading ==
{{Note|It's easier to use [[BC proc entries|the new <code>/proc/bc</code> interface]], i.e. <code>cat /proc/bc/$CTID/resources</code>.}}
If you want to print UBC values for a specific container, the following construct can be helpful
<nowiki>egrep -A23 "${CTID}:" /proc/user_beancounters</nowiki>
Or with headers, though slightly harder to remember:
<nowiki>sed -nr "1,2p;/${CTID}:/,+23p" /proc/user_beancounters</nowiki>
Here <code>${CTID}</code> is the ID of the container you are interested in.
In case you want to print UBC values for a few containers at once, set CTID to something like <code>(101|102|103)</code>.
== Notes ==
<references/>