10 More Discussions You Might Find Interesting
1. AIX
Hello AIXians,
I can't boot my AIX, it hangs and stops at the code error: 0518
After searching google, I knew the problem is due to problems in File Systems.
So the solution is booting from any bootable media, then run these commands in maintenance mode:
#fsck -y /dev/hd4
#fsck -y... (3 Replies)
Discussion started by: Mohannad
3 Replies
2. Solaris
Hi Experts,
I have M4000 server with 132 GB Physical memory. 4 sparse zones are running under this server, which are running multiple applications. I am not getting any pointer, where swap space is getting consumed. Almost 97% of swap space is being used. I checked all /tmp (of zones as well),... (7 Replies)
Discussion started by: solaris_1977
7 Replies
3. UNIX for Advanced & Expert Users
Hy!
Recently i had a problem with one of mine Tru64 machines.
It started to kill processes because of low amount of swap space. It said that it went below 10 %.
But when i ran swapon -s it said:
In-use space: 12 %
So, the system couldn't accept any new ssh connections plus it killed most of... (1 Reply)
Discussion started by: veccinho
1 Replies
4. Solaris
Hi, Anyone can help
My solaris 8 system has the following
/dev/null , /dev/tty and /dev/console
All permission are lrwxrwxrwx
Can this be change to a non-world write ??
any impact ?? (12 Replies)
Discussion started by: civic2005
12 Replies
5. HP-UX
Im following the directions from
Mirroring the Root File System and Primary Swap
#
Mirror the root logical volume to the above disk:
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c0t3d0
#
Mirror the primary swap logical volume:
lvextend -m 1 /dev/vg00/prswaplv /dev/dsk/c0t3d0
#
... (1 Reply)
Discussion started by: csaunders
1 Replies
6. AIX
Good morning
I have a problem with a partition (P570). A user's process take all the memory, and the swap. So the partition shutdown.
How can I limit a process to not take all the swap ?
(4 Go of memroy, 1 Go of swap)
thank you (2 Replies)
Discussion started by: pascalbout
2 Replies
7. UNIX for Advanced & Expert Users
During Sun Solaris 8 installation, I did allocate 1 G for the swap partition. By doing a "df -k" shows the swap space usage is only 1% even during the application server is heavily processing.
However, when I do a "vmstat", it shows that the swap memory free space is only 8816 out of 1419100.
... (1 Reply)
Discussion started by: champion
1 Replies
8. UNIX for Advanced & Expert Users
Over the last couple of days my laptop has been stalling terribly on bootup and when starting up applications (even a terminal takes ages to come up) Whilst trying to figure out whats happened I noticed that nothing is being swapped out. Output from top command shows that I have approx 500mb... (2 Replies)
Discussion started by: silvaman
2 Replies
9. UNIX for Advanced & Expert Users
Hi all,
when I execute a below script, I'm getting the following error,
how can I solve it.
$ sim_rep1.sh
======================
swap space below 10 percent free
Unable to obtain requested swap space
========================
Thanks
Krishna (1 Reply)
Discussion started by: krishna
1 Replies
10. Filesystems, Disks and Memory
I have sun solaris 8 for intell with 128m physiccal ram and swap of 148. Oracle requires to have 512M swap space. Is there a way I can change the swap space on intell machine without repartioning the box:? what if i create a link to /swap from another place????
pls advise
Jigar (1 Reply)
Discussion started by: jigarlakhani
1 Replies
swap(1M) System Administration Commands swap(1M)
NAME
swap - swap administrative interface
SYNOPSIS
/usr/sbin/swap -a swapname [swaplow] [swaplen]
/usr/sbin/swap -d swapname [swaplow]
/usr/sbin/swap -l
/usr/sbin/swap -s
DESCRIPTION
The swap utility provides a method of adding, deleting, and monitoring the system swap areas used by the memory manager.
OPTIONS
The following options are supported:
-a swapname Add the specified swap area. This option can only be used by the super-user. swapname is the name of the swap file: for
example, /dev/dsk/c0t0d0s1 or a regular file. swaplow is the offset in 512-byte blocks into the file where the swap area
should begin. swaplen is the desired length of the swap area in 512-byte blocks. The value of swaplen can not be less than
16. For example, if n blocks are specified, then (n-1) blocks would be the actual swap length. swaplen must be at least one
page in length. The size of a page of memory can be determined by using the pagesize command. See pagesize(1). Since the
first page of a swap file is automatically skipped, and a swap file needs to be at least one page in length, the minimum
size should be a multiple of 2 pagesize bytes. The size of a page of memory is machine dependent.
swaplow + swaplen must be less than or equal to the size of the swap file. If swaplen is not specified, an area will be
added starting at swaplow and extending to the end of the designated file. If neither swaplow nor swaplen are specified,
the whole file will be used except for the first page. Swap areas are normally added automatically during system startup by
the /sbin/swapadd script. This script adds all swap areas which have been specified in the /etc/vfstab file; for the syntax
of these specifications, see vfstab(4).
To use an NFS or local file-system swapname, you should first create a file using mkfile(1M). A local file-system swap file
can now be added to the running system by just running the swap -a command. For NFS mounted swap files, the server needs to
export the file. Do this by performing the following steps:
1. Add the following line to /etc/dfs/dfstab:
share -F nfs -o rw=clientname,root=clientname path-to-swap-file
2. Run shareall(1M).
3. Have the client add the following line to /etc/vfstab:
server:path-to-swap-file - local-path-to-swap-filenfs
--- local-path-to-swap-file -- swap ---
4. Have the client run mount:
# mount local-path-to-swap-file
5. The client can then run swap -a to add the swap space:
# swap -a local-path-to-swap-file
-d swapname Delete the specified swap area. This option can only be used by the super-user. swapname is the name of the swap file: for
example, /dev/dsk/c0t0d0s1 or a regular file. swaplow is the offset in 512-byte blocks into the swap area to be deleted. If
swaplow is not specified, the area will be deleted starting at the second page. When the command completes, swap blocks can
no longer be allocated from this area and all swap blocks previously in use in this swap area have been moved to other swap
areas.
-l List the status of all the swap areas. The output has five columns:
path The path name for the swap area.
dev The major/minor device number in decimal if it is a block special device; zeroes otherwise.
swaplo The swaplow value for the area in 512-byte blocks.
blocks The swaplen value for the area in 512-byte blocks.
free The number of 512-byte blocks in this area that are not currently allocated.
The list does not include swap space in the form of physical memory because this space is not associated with a particular
swap area.
If swap -l is run while swapname is in the process of being deleted (by swap -d), the string INDEL will appear in a sixth
column of the swap stats.
-s Print summary information about total swap space usage and availability:
allocated The total amount of swap space in bytes currently allocated for use as backing store.
reserved The total amount of swap space in bytes not currently allocated, but claimed by memory mappings for possi-
ble future use.
used The total amount of swap space in bytes that is either allocated or reserved.
available The total swap space in bytes that is currently available for future reservation and allocation.
These numbers include swap space from all configured swap areas as listed by the -l option, as well swap space in the form
of physical memory.
USAGE
On the 32-bit operating system, only the first 2 Gbytes -1 are used for swap devices greater than or equal to 2 Gbytes in size. On the
64-bit operating system, a block device larger than 2 Gbytes can be fully utilized for swap up to 2**63 -1 bytes.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of swap: LC_CTYPE and LC_MESSAGE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
pagesize(1), mkfile(1M), shareall(1M), getpagesize(3C), vfstab(4), attributes(5), largefile(5)
WARNINGS
No check is done to determine if a swap area being added overlaps with an existing file system.
SunOS 5.10 20 Jan 2004 swap(1M)