Swap Not available in system monitor

12.04 swap

9,596

Solution 1

Looks like the swap partition exist but check it cat /proc/swaps then try to activate it sudo swapon --all

Solution 2

13.10

If anyone else is having a similar issue on 13.10 I found these instructions on ArchWiki.

To check swap status:

swapon -s

free -m

If nothing is listed (you have no swap), you can create it on a running system like this:

first, to list available partitions use:

sudo blkid

The mkswap utility generates an UUID for the partition by default so it's best to use the -U flag to specify the swap UUID if one already exists. Replace "custom_UUID" with the corresponding UUID listed earlier. Also, replace /dev/sda5 with the partition you wish to use for swap:

Warning: All data on the specified partition will be lost.

sudo mkswap -U custom_UUID /dev/sda5

If the swap partition was not listed using blkid you can assign a random UUID with the following instead:

sudo mkswap /dev/sda5

To enable swap on this device:

sudo swapon /dev/sda5

Now, check /etc/fstab to make sure the system will mount the partition at boot. I will use gedit but any text editor will do.

sudo gedit /etc/fstab

If no swap is listed you may need to add it to the end of the list using /dev/sda5 or the UUID.

/dev/sda5 none swap defaults 0 0

reboot

I hope this helps.

Solution 3

A solution using the gparted GUI:

Open gparted, then left click on swap partition and chose swapon in the context menu.

9,596

Ahmed Zain El Dein

Updated on September 18, 2022

Comments

Ahmed Zain El Dein almost 2 years

i make a swap partition with 5 GB but i notice always that it is marked as "not available" on the system monitor plus when i do operations consume the whole RAM ubuntu starts to kill to relief the RAM with no use at all for SWAP

i typed in terminal sudo mountall -v and this what i get

mounted event handled for /proc/sys/fs/binfmt_misc local 1/5 remote 0/0 virtual 1/12 swap 0/1 mounted event handled for /sys local 1/5 remote 0/0 virtual 2/12 swap 0/1 mounted event handled for /sys/fs/fuse/connections local 1/5 remote 0/0 virtual 3/12 swap 0/1 mounted event handled for /sys/kernel/security local 1/5 remote 0/0 virtual 4/12 swap 0/1 mounted event handled for /dev/pts local 1/5 remote 0/0 virtual 5/12 swap 0/1 mounted event handled for /run/lock local 1/5 remote 0/0 virtual 6/12 swap 0/1 mounted event handled for /run/shm local 1/5 remote 0/0 virtual 7/12 swap 0/1 mounted event handled for /home/ahmed/.gvfs local 2/5 remote 0/0 virtual 7/12 swap 0/1 mounted event handled for /media/UbuntuGeneralFiles local 3/5 remote 0/0 virtual 7/12 swap 0/1 mounted event handled for /media/ONCE\040AND\040FOR\040ALL local 4/5 remote 0/0 virtual 7/12 swap 0/1 mounting event handled for /tmp mounted event handled for /dev local 4/5 remote 0/0 virtual 8/12 swap 0/1 mounted event handled for /proc local 4/5 remote 0/0 virtual 9/12 swap 0/1 mounted event handled for /sys/kernel/debug local 4/5 remote 0/0 virtual 10/12 swap 0/1 mounted event handled for /run local 4/5 remote 0/0 virtual 11/12 swap 0/1 mounted event handled for /home/ahmed virtual finished remote finished local 4/5 remote 0/0 virtual 12/12 swap 0/1 mounted event handled for /tmp local finished All filesystems mounted local 5/5 remote 0/0 virtual 12/12 swap 0/1

this is fstab output

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sdf1 during installation
UUID=34c3c29b-e5dd-4ed7-a49b-616afded4704 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sdf2 during installation
#UUID=9a7f0b9c-9be9-4074-8957-afcf25072bbe none            swap    sw              0       0
/dev/mapper/cryptswap1 none swap sw 0 0
/dev/disk/by-label/swap /mnt/swap auto nosuid,nodev,nofail 0 0
/dev/sdb2 /mnt/sdb2 ext4 nosuid,nodev,nofail 0 0

this is the output of sudo blkid `

  /dev/sda1: UUID="AC9C59EA9C59B016" TYPE="ntfs" 
/dev/sda2: LABEL="System" UUID="C26CFB2E6CFB1C3B" TYPE="ntfs" 
/dev/sda3: LABEL="ONCE AND FOR ALL" UUID="3EF60BD0F60B86FD" TYPE="ntfs" 
/dev/sdb1: UUID="34c3c29b-e5dd-4ed7-a49b-616afded4704" TYPE="ext4" 
/dev/sdb2: LABEL="Swap" UUID="21cf04d1-6c18-4ab7-a8c3-ec435ab3f43e" TYPE="ext4" 
/dev/sdb5: LABEL="UbuntuGeneralFiles" UUID="E636244736241AD7" TYPE="ntfs" 
/dev/sr1: LABEL="Etisalat 3.5G" TYPE="iso9660"

` sudo fdisk -l:

Disk /dev/sda: 1000.2 GB, 1000203804160 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953523055 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0d91aeaa

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      206847      102400    7  HPFS/NTFS/exFAT
/dev/sda2          206848   209717247   104755200    7  HPFS/NTFS/exFAT
/dev/sda3       209717248  1953519615   871901184    7  HPFS/NTFS/exFAT

Disk /dev/sdb: 250.1 GB, 250059350016 bytes
64 heads, 32 sectors/track, 238475 cylinders, total 488397168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000001

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   236331007   118164480   83  Linux
/dev/sdb2       236333056   244148221     3907583   82  Linux swap / Solaris
/dev/sdb3       244148222   488396799   122124289    5  Extended
/dev/sdb5       244148224   488396799   122124288    7  HPFS/NTFS/exFAT`

i dont know what is going on actually , so any help ?

Ahmed Zain El Dein about 11 years

yes that is what i am talking about the swap partition exist but the swap file no i dont know how come ! cat /proc/swaps Filename Type Size Used Priority
let champagne open about 11 years

no output at all for cat /proc/swaps ?
Ahmed Zain El Dein about 11 years

yes, norhing just zero
let champagne open about 11 years

post your fstab gksudo gedit /etc/fstab
let champagne open about 11 years

post sudo blkid
let champagne open about 11 years

sudo cp /etc/fstab /etc/fstab.bak
Ahmed Zain El Dein about 11 years

done so is that all?
let champagne open about 11 years

I don't see a swap partition.
Ahmed Zain El Dein about 11 years

it is exited infront of me on Disks application reserved partition 5 GB marked as swap
let champagne open about 11 years

post sudo fdisk -l
let champagne open about 11 years

/dev/sdb2: LABEL="Swap" UUID="21cf04d1-6c18-4ab7-a8c3-ec435ab3f43e" TYPE="ext4" The TYPE should be "swap"
let champagne open about 11 years

recreate the partition using the link help.ubuntu.com/community/SwapFaq
mchid about 10 years

https://wiki.archlinux.org/index.php/swap
emoleumassi about 8 years

it works for me
XavierStuvw over 7 years

Same issue with Ubuntu 14.04 LTS (swap partition existing, swap memory not). This solution worked perfectly and instantly for me.
clamentjohn over 5 years

Just a side note: If you already have swap partitioned you can use gparted to swapon using the GUI. Its super simple