Sponsored Content
Operating Systems HP-UX Could I mount a swap/dump partition on /tmp? Post 302407732 by vbe on Friday 26th of March 2010 08:33:27 AM
Old 03-26-2010
Quote:
We can reduce this space without problem ?
without problem, no...
It is going to ask for a reboot and boot from a make_recovery tape or so... to be able to change the size means almost reinstalling...
Or you try to create swap elsewhere and change priority order which will let you try after to comment out /dev/vg00/lvol2 and then try to reduce... (dont know if Online-JFS will let you with the swap device active...)
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Swap Partition Space

first of all, sorry about my english...I´m a spanish newbie to this marvelous OS and i have just a couple of doubts...u know? :-) 1) how big should my swap partition be if i installed debian 2.2r3 or FreeBSD 4.x on a AMD k7 1400Mhz with 512Mb of Random Access Memory? i heard that those OS... (1 Reply)
Discussion started by: I[X]ION
1 Replies

2. UNIX for Dummies Questions & Answers

Linux Swap Partition

How big do I set the swap partition when i'm setting up my hard drive to install RedHat. (Using Partition Magic) thanks! primal (2 Replies)
Discussion started by: primal
2 Replies

3. Linux

swap partition?

What does a swap partition do exactly? I was messing arround with a linux machine at my school and i deleted the swap partition using fdisk and then rebooted the machine and it worked fine and wrote a swap partition back in...lol. Is it a nessary part of the OS to use that partition? (7 Replies)
Discussion started by: byblyk
7 Replies

4. Solaris

Increase size of /tmp swap File

Hi Guys I need to increase the size of my /tmp swap file. What is the easiest way to do this. Thanks Carson (2 Replies)
Discussion started by: cmackin
2 Replies

5. UNIX for Dummies Questions & Answers

I've created a partition with GNU Parted, how do I mount the partition?

I've created a partition with GNU Parted, how do I mount the partition? The manual information at http://www.gnu.org/software/parted/manual/parted.html is good, but I am sure about how I mount the partition afterwards. Thanks, --Todd (1 Reply)
Discussion started by: jtp51
1 Replies

6. Solaris

/tmp: File system full, swap space limit exceeded

Can you help. My server sunning solaris 9 on x86 platform pretty much hung for a few hours... I could not use telnet or ssh to the box - it kept refusing connection. A few hours later - I was able to log in again. The server has not rebooted but here are the first errors in the messages log... (5 Replies)
Discussion started by: frustrated1
5 Replies

7. Solaris

/tmp as swap

So with solaris 10 are people not using the old /tmp as a regular UFS filesystem and making /tmp part of swap or tmpfs... what are peoples thoughts on this? (5 Replies)
Discussion started by: csaunders
5 Replies

8. Shell Programming and Scripting

how to mount swap on /tmp?

Hi all, I would like to know how to mount swap on /tmp at boot time? I mean i would like to know the exact commands... i will be implementing it on a distro of opensolaris ,belenix. is it the same as other mounts ? because when i surfed the net it was a little different and also since its... (0 Replies)
Discussion started by: wrapster
0 Replies

9. Filesystems, Disks and Memory

Partition 1 swap not mounting ?

Hi, running mount, I get the following, no part1 swap as part1 swap has been created and is listed below. System works fine anyway. As I cannot unmount part1, what is a standard procedure to make part1 on. Jack ============= .. $ free total used free shared buffers cached Mem:... (2 Replies)
Discussion started by: jack2
2 Replies

10. Solaris

Solaris full /tmp - du and df different swap NOT filled

Hello all, The issue is # df -h /tmp Filesystem size used avail capacity Mounted on swap 4.0G 4.0G 8.7M 100% /tmp # du -sh /tmp/ 87M /tmp By now you probably will say that this is open file destriptor issue. Well no, nothing... (2 Replies)
Discussion started by: click
2 Replies
MKSWAP(8)						     Linux Programmer's Manual							 MKSWAP(8)

NAME
mkswap - set up a Linux swap area SYNOPSIS
mkswap [-c] [-vN] [-f] [-p PSZ] device [size] DESCRIPTION
mkswap sets up a Linux swap area on a device or in a file. (After creating the swap area, you need the swapon command to start using it. Usually swap areas are listed in /etc/fstab so that they can be taken into use at boot time by a swapon -a command in some boot script.) The device argument will usually be a disk partition (something like /dev/hda4 or /dev/sdb7) but can also be a file. The Linux kernel does not look at partition Id's, but many installation scripts will assume that partitions of hex type 82 (LINUX_SWAP) are meant to be swap par- titions. (Warning: Solaris also uses this type. Be careful not to kill your Solaris partitions.) The size parameter is superfluous but retained for backwards compatibility. (It specifies the desired size of the swap area in 1024-byte blocks. mkswap will use the entire partition or file if it is omitted. Specifying it is unwise - a typo may destroy your disk.) The PSZ parameter specifies the page size to use. It is almost always unnecessary (even unwise) to specify it, but certain old libc ver- sions lie about the page size, so it is possible that mkswap gets it wrong. The symptom is that a subsequent swapon fails because no swap signature is found. Typical values for PSZ are 4096 or 8192. Linux knows about two styles of swap areas, old style and new style. The last 10 bytes of the first page of the swap area distinguishes them: old style has `SWAP_SPACE', new style has `SWAPSPACE2' as signature. In the old style, the rest of this first page was a bit map, with a 1 bit for each usable page of the swap area. Since the first page holds this bit map, the first bit is 0. Also, the last 10 bytes hold the signature. So, if the page size is S, an old style swap area can describe at most 8*(S-10)-1 pages used for swapping. With S=4096 (as on i386), the useful area is at most 133890048 bytes (almost 128 MiB), and the rest is wasted. On an alpha and sparc64, with S=8192, the useful area is at most 535560992 bytes (almost 512 MiB). The old setup wastes most of this bitmap page, because zero bits denote bad blocks or blocks past the end of the swap space, and a simple integer suffices to indicate the size of the swap space, while the bad blocks, if any, can simply be listed. Nobody wants to use a swap space with hundreds of bad blocks. (I would not even use a swap space with 1 bad block.) In the new style swap area this is precisely what is done. The maximum useful size of a swap area now depends on the architecture. It is roughly 2GiB on i386, PPC, m68k, ARM, 1GiB on sparc, 512MiB on mips, 128GiB on alpha and 3TiB on sparc64. Note that before 2.1.117 the kernel allocated one byte for each page, while it now allocates two bytes, so that taking a swap area of 2 GiB in use might require 2 MiB of kernel memory. Presently, Linux allows 32 swap areas (this was 8 before Linux 2.4.10). The areas in use can be seen in the file /proc/swaps (since 2.1.25). mkswap refuses areas smaller than 10 pages. If you don't know the page size that your machine uses, you may be able to look it up with "cat /proc/cpuinfo" (or you may not - the con- tents of this file depend on architecture and kernel version). To setup a swap file, it is necessary to create that file before initializing it with mkswap , e.g. using a command like # dd if=/dev/zero of=swapfile bs=1024 count=65536 Note that a swap file must not contain any holes (so, using cp(1) to create the file is not acceptable). OPTIONS
-c Check the device (if it is a block device) for bad blocks before creating the swap area. If any are found, the count is printed. -f Force - go ahead even if the command is stupid. This allows the creation of a swap area larger than the file or partition it resides on. On SPARC, force creation of the swap area. Without this option mkswap will refuse to create a v0 swap on a device with a valid SPARC superblock, as that probably means one is going to erase the partition table. -p PSZ Specify the page size to use. -v0 Create an old style swap area. -v1 Create a new style swap area. If no -v option is given, mkswap will default to new style, but use old style if the current kernel is older than 2.1.117 (and also if PAGE_SIZE is less than 2048). The new style header does not touch the first block, so may be preferable, in case you have a boot loader or disk label there. If you need to use both 2.0 and 2.2 kernels, use the -v0 option when creating the swapspace. SEE ALSO
fdisk(8), swapon(8) Linux 2.2.4 25 March 1999 MKSWAP(8)
All times are GMT -4. The time now is 04:35 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy