08-21-2003
Re: physical memory
Quote:
Originally posted by cchien
It is just a general question....is there a limit on the memory? I am looking into a process to store image files on the unix server which will be accessed by the application, and I just wonder if there is any limit regarding the physical or virtual memory. I am very new to unix, so thanks for any help!
Normally the hardware will limit the maximum amount of RAM a system can use. For example, most 32 bit Intel systems can handle a maximum of 4 gigs of RAM. There are some exceptions, but they are not common.
Swap file size will be limited by the filesystem that they sit on.
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LEARN ABOUT DEBIAN
vzcalc
vzcalc(8) Containers vzcalc(8)
NAME
vzcalc - calculate resource usage of a container
SYNOPSIS
vzcalc [-v] CTID
DESCRIPTION
This utility displays the share of the host system resources a particular container is using. If the container is running, the current
usage is displayed. High utilization values (>100%) mean the system is overloaded (or the container has an invalid configuration).
Current
Shows the amount of the resources consumed by the container at a given time.
Promised
Shows the resources soft limit values "promised" for a given container.
Max Shows the resources hard limit values "promised" for a given container.
If the -v option is specified, the following additional information is also displayed:
Low Mem
The part of memory residing at lower addresses and directly accessed by the kernel (only makes sense for 32-bit architectures).
Total RAM
Total memory.
Mem+Swap
Amount of memory available for applications (both RAM and swap space).
Alloc Mem
Standard memory allocations made for applications in a container. This is a more "virtual" system resource than RAM or RAM and
swap.
Num. Proc
Number of processes.
OPTIONS
-v Display additional information.
EXIT STATUS
Normally, the exit status is 0. On error, the exit status is 1.
LICENSE
Copyright (C) 2000-2009, Parallels, Inc. Licensed under GNU GPL.
OpenVZ 10 Dec 2009 vzcalc(8)