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UBC auxiliary parameters

96 bytes removed, 21:01, 1 October 2011
simplify toc
administrators and hide them in “basic” management modes.
== UBC Auxiliary Parameters ==   === lockedpages ===
Process pages not allowed to be swapped out (pages locked by <code>mlock(2)</code>).
of applications in the given container only.
=== shmpages ===
The total size of shared memory (IPC, shared anonymous mappings and
<code>tmpfs</code> objects).
of applications in the given container only.
=== physpages ===
Total number of RAM pages used by processes in a container.
<code>limit</code> to 'unlimited' ([[LONG_MAX]]).
=== numfile ===
Number of open files.
Note: actually currently adjusting the <code>barrier</code> will change the kernel behaviour on "pre-charging" the numfile resource. If you change one you will most likely not notice any changes in container behaviour at all. This ability was added for researching purposes purely.
=== numflock ===
Number of file locks.
on the real requirements of the applications.
=== numpty ===
Number of pseudo-terminals.
for one container is limited to <code>256</code>.
=== numsiginfo ===
Number of <code>siginfo</code> structures.
the Linux default — <code>1024</code>.
=== dcachesize ===
The total size of <code>dentry</code> and <code>inode</code> structures locked in memory.
of applications in the given container only.
=== numiptent ===
The number of NETFILTER (IP packet filtering) entries.
to create more than 200–300 <code>numiptent</code>.
=== swappages ===
The amount of swap space to show in container.
The value of <code>held</code> shows how much swap space
is currently being used for this container.
 
== Units ==
{{Main|UBC parameter units}}