I tested fedora kde spin which has zram by default, the portion of swap ram gets filled up quickly since there is swap content that don't compress well. To over simplify, zram takes a portion of ram and tuned into swap space with compression 2:1, zswap is kinda similar (ratio 3:1) but spill over into a swap disk space when the ram portion gets filled up. I believe this issue is more prevalent on laptop sub 8 Gb RAM, I started to looking into zram and zswap. I added another 2 Gb swap file (default swap partition size on Zorin OS is 1Gb), adjusted the system swapiness and cache pressure, but the problem persisted, even the extra 2Gb swap file get filled up quickly and system start getting slow over time, especially because I don't restart my laptop that much(that wont change). So, I started optimizing the OS, removing unwanted apps, disabling unnecessary services at startup (specially gnome-software). The swap space is on nvme m.2 drive, I don't notice performance issue when the system use the swap space, but when that space fills up, then I notice the performance degradation. After troubleshooting and testing, I saw that the swap partition gets fulled up pretty quickly from daily use, mainly heavy web browsing, when that happens, the CPU spikes and the system start struggling finding spare memory. I have been daily driving Zorin OS over two months, here is my laptop specs:Īt first I was pleasantly impressed by the speed and performance of the OS, then I notice that the system starts getting slow and glichy over time.
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