thunderbird pegs and hogs hard drive disc io

[Colin Law]

On 23 March 2015 at 00:58, thufir <hawat.thufir at gmail.com> wrote:
> On Sun, 22 Mar 2015 20:48:46 +0100, Nils Kassube wrote:
>
>> thufir wrote:
>>> thufir at tleilax:~$ sudo swapon /dev/sda2 swapon: /dev/sda2: read swap
>>> header failed
>>
>>> thufir at tleilax:~$ sudo fdisk -l
>>
>>> Device     Boot     Start       End  Sectors  Size Id Type
>>
>>> /dev/sda2 147926520 156296384  8369865    4G 82 Linux swap / Solaris
>>
>> To me it looks like someone forgot to use mkswap:
>>
>> sudo mkswap /dev/sda2
>>
>> After that command the swapon should work.
>>
>>
>> Nils
>
>
>
> Very generous of you to say "someone" ;)
>
> thufir at tleilax:~$ sudo mkswap /dev/sda2
> [sudo] password for thufir:
> Sorry, try again.
> [sudo] password for thufir:
> Setting up swapspace version 1, size = 4184928 KiB
> no label, UUID=f04cbd74-c97a-47f7-bdf4-917bef80d6bc
> thufir at tleilax:~$
> thufir at tleilax:~$
> thufir at tleilax:~$ sudo swapon /dev/sda2
> thufir at tleilax:~$
> thufir at tleilax:~$ free -h
>              total       used       free     shared    buffers     cached
> Mem:          1.9G       1.1G       819M       257M        78M       604M
> -/+ buffers/cache:       488M       1.5G
> Swap:         4.0G         0B       4.0G
> thufir at tleilax:~$
>
>
> So, swap is on?
>
> I'll google this up, but I guess this just needs to be in a startup
> script somewhere?

No, mkswap just initialises the partition contents for use by swap.
You only need to do it once.

Colin