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Setting swap partition size
I have a TKLDev TurnKey appliance tailored for an installation of Oracle XE 11g. Oracle has swap space requirement:
Minimum swap space required for Oracle Database XE is 2 GB or twice the size of RAM, whichever is lesser.
How do I can set the swap partition size for the appliance ? Currently with debian it looks like there is rules how swap size depends on RAM. As I can probably run the appliance with less memory than 2 GB I'd like to set the swap partition size explicitly to the required minimum value.
I have googled and read e.g.
Newb Q: where is the swap partition, and how do i make it bigger
change disk size on project pier virtual applance
but I'm a bit lost at the moment.
Replies (2)
Generally swap is defined on install
Reply 1Creating swap
Reply 2You can create swap a few ways here are two
If you have enough space on the drive you could use: (preferred to use a second drive for swap; faster!)
cd /
dd if=/dev/zero of=/swapfile bs=1M count=10240 <-- I usually change it to equal about 5G
Now mount it on boot but test manually before a reboot
vim /etc/fstab
/swapfile swap swap defaults 0 0
mount -a <-- mounts all
swapon -s <-- verify mount of swap
You can also "create image" meaning a AMI then launch and add extra drive on AWS and do this
fdisk /dev/xvdb <-- which ever disk you created
With fdisk create partition type 82 which is swap
mkswap /dev/xvdb
swapon /dev/xvdb
Now have fstab automount it.
cat /etc/fstab
/dev/xvdb swap swap defaults 0 0
Then type "mount -a"
and finally
swapon -s
Be careful that you test mounts before rebooting a remote machine like AWS's otherwise 'HANG IT HIGH!'
And TBH I'm not sure what the default is for TKL.
If you want to have your appliance default to 2GB at install then you'll have to dig into the installer logic... TKL uses a modified version of di-live to install but TBH I wouldn't know where to start to modify that to do what you want...