@probable_possum@leminal.space
Post #613131
2026-03-10 11:56 UTC
What’s the use case over RAM or disk swap? It’s compressed but faster than SSD? Hmm. That could help in distinct use cases…
Replies (1)
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@turdas@suppo.fi 2026-03-10 12:17
Yes, it’s basically faster than disk swap but uses some CPU cycles. The compression algorithms involved are very fast on modern CPUs so in some sense it’s “free RAM”. I set mine to almost 1:1 my physical RAM, because the way it works is that the zram disk size (62.6G there) is the amount of uncompressed data allowed on it, and the compression on real-world data is almost always at least 50% – so if the zram device fills up, it’ll be using something like 32G of physical memory. I’m yet to hit real-world usecases that would have tested these limits though, and the defaults are much more conservative.