How to change zram size ?

Thanks for an answer. I've managed to edit the file and change the default 13% size of zram to 30% without a problem. So far I didn't encounter any side issues but even a notable improvement in overall usability of my Jolla. Worth mentioning is that I have also changed the swappiness value from default 30 to 60 so there is more free physical ram available for heavy applications and oom condition is less often triggered. Also with swappiness 60 old pages seem to be more often flushed(?) or freed from zram so the situation when all compressed ram is full gets less probable. It seems to me that further playing with vm, oom_killer configuration might bring us significant multitasking improvement and even solve the ultimate “multitasking regression„ that u10 brought to some users ;)

So how to actually apply the new setting? For me it seems that the /sys/block/zram0/disksize doesn't change from the default value even if I edit the config file.

I used tinyedit from openrepos with root privileges (another package called tiny root must be installed also from openrepos) to edit the config file. It can be done via command line too with vi editor which if I recall correctly is installed by default so the only thing you need to do is gain developer access in terminal and paste this:

vi /usr/sbin/zramswapon

Then change the 13 value in SIZE=$(( $MEMORY_IN_KBYTES * 1024 * 13 / 100 / NUM_ZRAM_DEV )) for number you want and save it by tapping shift(?) character twice (so you can enter big letters) and typing ZZ (two capital letters). This should save your changes to the file and quit the editor.

@ropelius please repost as comment since you asked a question instead of an answer.