Ask Ubuntu
Ask Ubuntu

Questions tagged [zram]

DRAM computer memory technology.

36 questions
47
votes
7 answers

How do I use zRam?

I installed zRam as described on webupd8.org. I installed it from the terminal. Is that all I have to do or do I have to do some configuration or something? Does the zram-enabler do everything by itself or do I have to set some parameters?
Steiger
  • 7,857
18
votes
1 answer

How do I prevent initramfs from resuming from a zram device?

Whenever initramfs is updated I get a message similar to this: I: The initramfs will attempt to resume from /dev/zram1 I: (UUID=1d4b8573-7eee-43c9-a02a-10a65fc17b8a) I: Set the RESUME variable to override this. However, because all my swap…
Andrea Corbellini
  • 16,126
12
votes
4 answers

How to permanently enable compressed ram swap? What version to use?

EDIT: In precise there's now zram-config. It's an upstart job compressing up to half of your ram spread over $(number of CPU cores) swap devices. It didn't allways start at boot but issuing sudo service zram-config start works. I enabled…
turbo
  • 4,712
10
votes
5 answers

How to change zram size?

I installed zram with sudo apt-get install zram-config. After that it started automatically and when I verified with cat /proc/swaps it's running properly But when I used sudo echo 128M > /sys/block/zram0/disksize to change the zram size like in the…
phuclv
  • 760
10
votes
1 answer

ZRAM vs. regular swap partition

I don't fully understand the functionality and the potential advantages of zram. For example: once zram is activated, what percentage of memory will be dedicated to paging? Another issue: obviously the total ram size is the upper bound of swap file…
MadHatter
  • 501
8
votes
1 answer

Has zram been removed in the latest ubuntu (17.10)?

When running sudo modprobe zram (or modinfo for that matter) I get the following error: modprobe: FATAL: Module zram not found in directory /lib/modules/4.13.0-21-generic Has zram been removed from Ubuntu 17.10?
Ru Hasha
  • 183
5
votes
2 answers

How to install zram on Ubuntu 13.04?

I tried to install zRam using the following commands in the terminal: sudo add-apt-repository ppa:shnatsel/zram sudo apt-get update sudo apt-get install zramswap-enabler But it throws the following error message which says that the package is not…
Andressa
  • 51
4
votes
2 answers

Can I use zRAM and a disk swap file at the same time?

I have 24GB of available RAM in my machine, but I usually use far less than 8GB of it. However, sometimes I'm involved with large data files and I suddenly need 40GB, and on infrequent occasions, I'd like to be able to access even more (up to 60GB).…
Thomas Browne
  • 376
  • 3
  • 8
  • 26
4
votes
1 answer

Can I combine Zram with Zswap without double compression?

I currently have most of my swap on Zram, since I don't want to wear my SSD excessively. BUT, I do have a swap partition left over from when the system was installed, and I just lowered the priority of this, and enabled it as well... My question is…
James Lewis
  • 981
4
votes
1 answer

make zram use lz4 compression algorithm

Ubuntu 18, trying to make zram to use lz4 compression. Tried modifying /usr/bin/init-zram-swapping file #!/bin/sh ........... ........... for i in $(seq ${NRDEVICES}); do DEVNUMBER=$((i - 1)) echo $mem > /sys/block/zram${DEVNUMBER}/disksize …
Sirajus Salekin
  • 1,737
  • 13
  • 29
3
votes
0 answers

zRAM, increasing size - 16.04/Xenial

How to control zram seems to be quite confusing. I'd like to change my zram size from 8G to 10G, and maybe later to 12G (I have a total of 16G). I have gone into /etc/initramfs-tools/initramfs.conf and changed COMPCACHE_SIZE to "10G", after which…
Diagon
  • 470
3
votes
1 answer

How do I replace zram swap with a swap file?

I am running a Jetson Nano with Jetpack 4.4 which (Ubuntu 18.04), by default, has 4x495 Meg ZRAM partitions for swap space. The problem is that for a data science project I need MORE RAM than the 4gig installed on the Jetson (and whatever I get from…
Thomas Browne
  • 376
  • 3
  • 8
  • 26
2
votes
1 answer

Customisation of zram and enable zram disable swap partition

How do I enable zram and disable the swap partition? How do I use zram instead of a swap partition to gain some speed and hard disk? How do I configure zram to my needs? Why do these things?
Pavlos Theodorou
  • 2,713
2
votes
2 answers

Cannot install zRam

I tried to install zRam using following commands in terminal - sudo add-apt-repository ppa:shnatsel/zram sudo apt-get update sudo apt-get install zramswap-enabler But it throws the following error which says that the package is not available, E:…
user24665
  • 183
2
votes
1 answer

Relation of swappines and zram

I have been interested in zram so I tried to test it. But as I continue to read the guide on what and how to install it, I have realized that it creates a file /dev/zram0 and mounts it as a swap, I use mount to know it. I have set the swappiness of…
user128712
  • 2,452
1
2 3