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Sunday, 26 January 2014

Creating a Linux Mint Power Server - Memory and Swap ~ Ray's Linux observations

Creating a Linux Mint Power Server - Memory and Swap ~ Ray's Linux observations:

'via Blog this'

Upgrading the memory and or swap file

In case you are using a pathetic I-B-M foundation server you will find that 2 GB of memory is not enough. Also, if you did a default install you will only have a swap file of 2 GB. In my case I had a faulty 1 GB stick that left me with only 1 GB.

While waiting for some memory to arrive from ebay I decided to create two swap files on two separate disks to temporarily increase the memory capacity. Apparently the kernel will load balance between the two files. (this is of course overkill and pretty pointless but nevertheless it was good to test the mechanism)

Here is how.

Create the swap files

dd if=/dev/zero of=/swapfile1 bs=1024 count=10485760
dd if=/dev/zero of=/mnt/ADD-DOMINO/swapfile2 bs=1024 count=10485760

Issue the mkswap command

mkswap /swapfile1
mkswap /mnt/ADD-DOMINO/swapfile2

Edit fstab

gedit /etc/fstab &

UUID=3452fbd7-9a3c-419b-a854-e069eaa4e920      none    swap    sw      0       0
/swapfile1                       none    swap    sw      0       0
/mnt/ADD-DOMINO/swapfile2                none    swap    sw      0       0

Switch on the swap file

swapon /swapfile1
swapon /mnt/ADD-DOMINO/swapfile2

Set the swappiness

echo 20 > /proc/sys/vm/swappiness

echo 90 > /proc/sys/vm/swappiness

To make this permanent.

Edit - /etc/sysctl.conf and adjust vm.swappiness

After my real memory upgrade.

I reinstalled this server so the default installer created the swap partition. 

This concludes - Creating a Linux Mint Power Server - 2 - Memory and Swap

This should give you enough RAM to install more applications but it is not going to very fast!
- See more at: http://rayslinux.blogspot.co.uk/2014/01/creating-linux-mint-power-server-memory.html#sthash.x0XWCrQu.dpuf


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