On Saturday, 2 May 2020 00:08:24 BST Raphael MD wrote: > On Fri, 1 May 2020 at 18:49 J. Roeleveld <jo...@antarean.org> wrote: > > On 1 May 2020 21:50:02 CEST, Raphael MD <raph...@gmail.com> wrote: > > >Hello! > > > > > >Could I turn my Linux swap off. > > >I have 32 GB of RAM memory, I suppose my system don’t need swap, > > >because > > >I’vea lot of RAM, is this true? > > > > > >Thanks > > > > This question keeps getting asked every time people go past some imaginary > > large figure of RAM. > > > > First time I encountered it was somewhere in the 1990s. A friend had a > > machine with 64MB ram, a massive amount at that time, and disabled all > > swap. He was surprised his machine crashed because of memory issues, > > until I asked what he was running. The list included several memory > > intensive applications. > > He never asked that again and adds it to all his machines. > > > > My desktop has 32GB and also has some swap. I do regularly see it used and > > not because of memory leaks like Dale is mentioning, although those do > > appear on occasion. On my desktop it's mostly because I have a lot of > > stuff > > running the whole time. > > > > So, yes, you still need swap and always will. Unless you put about 10 > > times the current magical figure in a desktop. In my view, that would be > > 320GB for now, and in another 5 years, that would be around 640GB. > > When you have that level of overkill in a desktop, I will not consider OOM > > to be likely. > > > > > > -- > > Joost > > > > -- > > Sent from my Android device with K-9 Mail. Please excuse my brevity. > > Well, it’s figuring that some sort of swap space is necessary, but > regarding pressure level on kernel, can I setup it to zero or I’m obligated > to put some number because I’ve a swap file? > > Thanks
Only you know how you're using your PC and if the 32G of RAM can/will be used up at some point. I can assure you if you decide to compile chromium with some silly --jobs number, you *will* run out of memory and wish you had set some swap at the time. I don't think I have ever regretted having swap in place and still revisit old systems I should have retired years ago to add some more swap to make sure a memory hungry application or compilation can run and complete without OOM errors.
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