Re: ZRAM setup and configuration

[Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx>]

On Wed, Oct 18, 2017 at 1:22 PM, russel phillipe <russel.phillipe@xxxxxxxxx> wrote:

I am trying to setup ZRAM on ubuntu 4.4 kernel. I can load and create zram based swap devices fine as you can see below.

# apt-get install zram-config 

cat /proc/swaps 

Filename Type Size Used Priority

/dev/sda3 partition 16638972 0 -1

/dev/zram0 partition 2036816 0 5

/dev/zram1 partition 2036816 0 5

/dev/zram2 partition 2036816 0 5

How can I make it work. I tried running memtester and load it with stress

stress --vm-bytes $(awk '/MemFree/{printf "%d\n", $2 * 0.9;}' < /proc/meminfo)k --vm-keep -m 1

It does not look like it is being used.

I notice that 'used' count in /proc/swaps does not bump at all. I even tried 'vmstat 1 100 ' while running stress and memtester and did not see any change in SO and SI. 

What am I missing?

Thanks

Russel

I think you need to bring more load. Using mem free, that means you don't even push the buffer/page cache to be flushed out.

Without using too complicated math, I suggest to stress as much as twice amount of available RAM. Hopefully it will bring difference.

regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

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