Resource Management Parameters Overview

Administrators control the resources available to the Container through a set of its resource management parameters. These parameters are presented in the following table:


Name	Type	Description
Main parameters
`numproc`	`system`	Number of processes and threads.
`numtcpsock`	`system`	Number of TCP sockets.
`numothersock`	`system`	Number of sockets other than TCP.
`vmguarpages`	`system`	Memory allocation guarantee.
`cpuunits`	`cpu`	CPU power.
`diskspace`	`disk`	Disk space quota.
`rate`	`network`	Network bandwidth.
`ratebound`	`network`	Whether network bandwidth is limited.
Additional parameters
`kmemsize`	`system`	Size of unswappable kernel memory allocated for processes in this Container.
`tcpsndbuf`	`system`	Total size of TCP send buffers.
`tcprcvbuf`	`system`	Total size of TCP receive buffers.
`othersockbuf`	`system`	Total size of UNIX-domain socket buffers, UDP and other datagram protocol send buffers.
`dgramrcvbuf`	`system`	Receive buffers of UDP and other datagram protocols.
`oomguarpages`	`system`	The guaranteed amount of memory for the case the memory is "over-booked" (out-of-memory kill guarantee).
`privvmpages`	`system`	Memory allocation limit.
`lockedpages`	`system`	Process pages not allowed to be swapped out (pages locked by `mlock(2)`).
`shmpages`	`system`	Total size of shared memory (IPC, shared anonymous mappings and `tmpfs` objects), in pages.
`physpages`	`system`	Total number of RAM pages used by processes.
`numfile`	`system`	Number of open files.
`numflock`	`system`	Number of file locks.
`numpty`	`system`	Number of pseudo-terminals.
`numsiginfo`	`system`	Number of `siginfo` structures.
`dcachesize`	`system`	Total size of `dentry` and `inode` structures locked in memory.
`numiptent`	`system`	Number of `NETFILTER` (IP packet filtering) entries.
`cpulimit`	`cpu`	Limit on CPU consumption.
`diskinodes`	`disk`	Disk inode quota.
`quotatime`	`disk`	Disk quota grace period.
`quotaugidlimit`	`disk`	Limit on the number of `uid` and `gid` accounting entries.

Main parameters are the ones most important for functionality, performance, and availability of the Container.

Note: Availability characterizes the property of Containers or any other server environment to stay operative and serve clients. It is usually measured as the ratio of operative time to total time. High availability is achieved by rare failures and low downtime.

The Type column shows the type of resource controlled by the parameter: system, cpu, disk, or network. This guide is focused on system resources and discusses their management. CPU resources are briefly discussed in the Controlling CPU Time Consumption section.

Management of disk space and network resources is discussed in Parallels Virtuozzo Containers User's Guide. The corresponding parameters are shown in the table for completeness.

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