07-29-2003
On Solaris you may try
prtconf|grep Mem
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1. UNIX for Dummies Questions & Answers
Hi!
I'm not a UNIX fanatic but I like using it for the
Oracle database since it's not stable in the Windows NT
environment (what is?).
Problem: Is there any command to show me the amount
of installed physical-memory in the machine? Is
there some other way to show the processes which uses... (4 Replies)
Discussion started by: elgholm
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2. UNIX for Dummies Questions & Answers
(rus cp1251)
Вобщем смысл поста такой:
я пытаюсь сделать Linux на дискетке и всё это опробовать на 386... =D
поскольку памяти там мало, а ядро и initrd вроде как зажаты, я хотел бы узнать
а) я сделал ядро (bzImage) оно 600 Кб. оно в памяти займёт 600 Кб или оно ещё разожмётся?
б) аналогично с initrd. и ещё: он вроде 4МБ а можно в параметрах ядра сделать поменьше, можно-ли в 1-2МБ памяти уместить initrd и ядро?
(eng)
i am try to make linux on diskette and run it on i386... =D
there are... (0 Replies)
Discussion started by: MR.Z
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3. UNIX for Dummies Questions & Answers
Hi all,
is there any command that i can execute to find out the size of the harddisk and RAM on my server? Because i am not the SA, i do not have access to such infomation. (2 Replies)
Discussion started by: new2ss
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4. UNIX for Advanced & Expert Users
Hi,
under UNIX AIX how determine the amount of memory consumed per user ?
Many thanks before. (1 Reply)
Discussion started by: big123456
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5. Linux
Hi,
I'm developing a data processing pipeline with multiple stages, with data being moved between the stages using shared memory segments. The size of the data is typically of the order of hundreds of megabytes, and there are typically a few tens of main shared memory segments each of size... (2 Replies)
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6. AIX
We just set up a system to use large pages. I want to know if there is a command to see how much of the memory is being used for large pages. For example if we have a system with 8GB of RAm assigned and it has been set to use 4GB for large pages is there a command to show that 4GB of the *GB is... (1 Reply)
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7. Solaris
Hi
How to display RAM memory info under Sol10 ?
I need info like :
- how many slots is available in MoBo
- how RAM is plugged into those slots
- total number of RAM memory size and size divided in each slot
ths for help. (2 Replies)
Discussion started by: presul
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8. Solaris
Hi All,
Ram memory always fails,i did not find the reason...........any one can help i this.:wall: (2 Replies)
Discussion started by: Rajesh_Apple
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9. Ubuntu
How do I find if I have defective ram in my computer.
I don't have a cd-rom, so I can't use a bootable cd. (1 Reply)
Discussion started by: locoroco
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10. Red Hat
Hi Experts,
I have a linux system , which triggers a alarm if RAM memory goes above 70%... When i see top command i cant find any process utilizing much of memory .. Can anyone tell me what could be the reason for high memory utilization.. Bellow is the free command o/p:
free ... (14 Replies)
Discussion started by: shaliniyadav
14 Replies
LEARN ABOUT DEBIAN
dphys-swapfile
DPHYS-SWAPFILE(8) System Manager's Manual DPHYS-SWAPFILE(8)
NAME
dphys-swapfile - set up, mount/unmount, and delete an swap file
SYNOPSIS
dphys-swapfile setup|swapon|swapoff|uninstall
DESCRIPTION
dphys-swapfile computes the size for an optimal swap file (and resizes an existing swap file if necessary), mounts an swap file, unmounts
it, and and delete it if not wanted any more.
OPTIONS
There is only one parameter, an command, which can be either of these:
setup Tells dphys-swapfile to compute the optimal swap file size and (re-)generate an fitting swap file. Default it 2 times RAM size. This
can be called at boot time, so the file allways stays the right size for current RAM, or run by hand whenever RAM size has changed.
swapon and swapoff These run the swapon and swapoff commands on the swapfile. Note that direct swapon/off from /etc/fstab is not possible,
as that is (at least on Debian) done in the same script that mounts /var (which is where the swap file most likely resides). And we
need to do our setup between those actions. So pass up /etc/fstab, and do our own swapon/off.
uninstall
Gets rid of an unwanted swap file, reclaiming the disk space.
CONFIG
The config file /etc/dphys-swapfile allows the user to set up the working environment for dphys-swapfile.
This config file is a sh script fragment full of assignments, which is sourced. Standard sh syntax rules apply. Assignments are:
CONF_SWAPFILE
Set where the swap file should be placed. Defaults to /var/swap. It is unlikely that you will need to change this, unless you have
very strange partitioning, and then you will most likely be using an swap partition anyway.
CONF_SWAPSIZE
Force file size to this. Default is 2*RAM size. This is unlikely to be needed, unless in strange diskspace situations. Note that
swap enabled and smaller than RAM causes kernal-internal VM trouble on random systems.
CONF_SWAPFACTOR
Set the relation between RAM and swap size. Must be an integer. Defaults to 2 which means swap size = 2 * RAM size
CONF_MAXSWAP
Set maximum size of the swap file in MBytes. Defaults to 2048 which was the former kernel limit for the swapfile size and is now a
limit to prevent unusual big swap files on systems with a lot of RAM.
FILES
/etc/dphys-swapfile
user config
$CONF_SWAPFILE
the swap file, target of the whole action (defaults to /var/swap)
EXAMPLES
dphys-swapfile is usually run at system startup and shutdown from an /etc/init.d (or /etc/rc.d) script, such as this (minimal) one:
#!/bin/sh
# /etc/init.d/dphys-swapfile - automatically set up an swapfile
# author franklin, last modification 2004.06.04
# This script is copyright ETH Zuerich Physics Departement,
# use under either modified/non-advertising BSD or GPL license
case "$1" in
start)
/sbin/dphys-swapfile setup
/sbin/dphys-swapfile swapon
;;
stop)
/sbin/dphys-swapfile swapoff
;;
esac
exit 0
If an sysadmin wants to have his swapfile in annother place, say /var/run/swap, he can use:
In /etc/dphys-swapfile:
CONF_SWAPFILE=/var/run/swap
AUTHOR
franklin@phys.ethz.ch, http://www.phys.ethz.ch/~franklin/
D-PHYS Swapfile Tools 2006.09.15 DPHYS-SWAPFILE(8)