Did you need to compile a kernel to enable it? I’ve just done the project of installing Debian on a 20 year old iMac with 2.5 GB of RAM, and while zram definitely seems to help, I’d love to try this as well.
this post was submitted on 22 Feb 2025
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I am running Debian 12 on all of my devices with Debians vanilla kernel! :-) Just enable MGLRU on Debian like it is described in this blogpost.
One further tip for ZRAM: On my device the LZ4 algorithm was noticeable faster than ZSTD (didn't try ZSTD with the enabled MGLRU, yet) and it was important to disable the RAM page read-ahead on my device.
Yes, but maybe debian enables it by default? You can check by running cat /sys/kernel/mm/lru_gen/enabled
If the result is 0x0007, it means MGLRU is fully enabled.
Debian does not enable it by default, cat /sys/kernel/mm/lru_gen/enabled will be a 0.