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== Tool == See {{Bug|1298}}.</div>
bugzilla.openvz.org -> bugs.openvz.org
There can be many applications that read <code>/proc/user_beancounters</code>, and thus if you will reset it, you may have problems with those other apps. Consider what happens if you reset your sent/received packets/bytes statistics on a network interface — programs which track it may not function properly.
Therefore, the proper usage of failcnt is not to check whether it is zero or not, but to check whether it is increased since the previous readout. In other words, check the difference, not the absolute value. It There is easy to write a simple script to do just utility {{Man|vzubc|8}} which can be used for thatpurpose. (See Also, see [[#Bash script]] for an example script)below.
== OK, I understand, but I still want to clear failcnt! ==
UBC failcnts are stored for the duration of the uptime of your container. Thus, restarting the container resets the counts.
The problem here is tcp time wait buckets can still be there after a container is stopped. You can check that by seeing the <code>held</code> column for <code>kmemsize</code> parameter. If it is not zero, that means you have to wait about 5 minutes in order to time wait buckets to expire, and the corresponding beancounter to be uncharged.
If you still see failcnt not reset to 0 after more than 5 minutes after container is stopped, your kernel was likely compiled with CONFIG_UBC_KEEP_UNUSED=y, and in that case you'll have to switch off this option if you want to reset beancounters when container is restarted.
If you're sure your kernel was NOT compiled with the above option and it's not resetting failcnt after 5 minutes, it means there is a bug in UBC code. Please file a detailed [[bug report]] to [http://bugzillabugs.openvz.org bugzillabugs.openvz.org]
== Bash vzubc == {{Man|vzubc|8}} is a tool to show user beancounters in a decent human readable form. Its relative mode (option -r or --relative) is used to show the failcnt difference from the previous run. vzubc is available in vzctl package since vzctl-3.0.27. == Alternative bash script ==
This script can show the failcount deltas for one or all containers since last reset, and reset the failcounts for one or all containers.
It uses only standard commands and programs that are usually included in all linux distro's:
=== Installation ===
=== beanc source code ===
<div class="mw-collapsible mw-collapsed">Click a link to the right to view the code →<source lang=bashclass="mw-collapsible-content">
#!/bin/bash
#####################################################################################################################
esac
</source>
== External links ==
* {{Forum|361}}
* {{Forum|497}}
* http://sisyphus.ru/en/srpm/yabeda
[[Category:FAQ]]
[[Category:UBC]]
