| === cpaelzer_ is now known as cpaelzer | ||
| linuxr | hello anyone..so I've just had this situation where my 4 gigs of memory were exhausted because of firefox, resulting in a complete system freeze. How can this happen in 2020? How can one single process take all the memory and not being prevented by the OS? | 14:30 |
|---|---|---|
| linuxr | what about OOM-killer? | 14:31 |
| ogra_ | what about it ? it randomly kills processes if you run out of ram | 14:32 |
| ogra_ | (it is a blindfolded berserk ...) | 14:33 |
| linuxr | ogra_, apparently it did not work at all | 14:34 |
| ogra_ | well, it only kicks in if all your ram *and* all your swap space is used up ... are you sure the system wasnt still swapping ? | 14:36 |
| linuxr | ogra_, maybe it was, but the music stopped, the cursor froze, and keyboard was dead | 14:38 |
| linuxr | I'd prefer to completely disable swap then, how would I do that? | 14:38 |
| trippeh | generally it will remain locked up for a while before it recovers (the situation is a bit sad, yes) | 14:39 |
| trippeh | a while = could be hours | 14:39 |
| linuxr | lol..can this somehow be tuned to agressively kill havoc processes? | 14:39 |
| ogra_ | iirc if you disable swap the kernel uses a completely different code path for memory mgmt ... not sure thats a good idea | 14:39 |
| ogra_ | (not sure if it still does it ... it was around 3.x times i looked at that last) | 14:40 |
| linuxr | there must be a way to fix this | 14:41 |
| linuxr | I mean, any shitty website can mess up my system as it appears | 14:42 |
| ogra_ | systemd is working on fixing it by trying to add an "intelligent" oom killer ... but not sure how far out that is | 14:42 |
| ogra_ | but yeah ... DOSing isnt easy to work against ... | 14:43 |
| trippeh | generally, disabling overcommit helps - but there also plenty of things that expect to overcommit a lot, so. | 14:43 |
| linuxr | I'd be quite happy with a script that periodically checks memory usage and kills the most agressive process(es) in case a critical level is reached | 14:46 |
| linuxr | how hard can it be to implement something like that? | 14:46 |
| ogra_ | try it ? | 14:48 |
| ogra_ | (i'm sure there is prior art though ... and you can always set the oom_score for your processes if needed so they get killed first) | 14:50 |
| linuxr | the bad thing is, I've been using linux for over a decade and cannot remember something like this was happening in all that time | 14:50 |
| ogra_ | well, then facebook came aroud and created full apps inside your browser windows | 14:51 |
| ogra_ | (and filled the remaining free ram with ads) | 14:52 |
| linuxr | maybe that is the problem | 14:53 |
| linuxr | web bloat | 14:53 |
| ogra_ | tell mark zuckerberg 😛 | 14:53 |
| linuxr | but still, this should not tear down my system | 14:53 |
| linuxr | it should just be handled properly (e.g. killed) when it gets too nasty | 14:54 |
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