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Peter Humphrey wrote: |
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> On Friday 22 July 2011 19:13:35 Grant wrote: |
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> |
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> |
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>> Wouldn't a sufficiently large swap (100GB for example) completely prevent |
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>> out of memory conditions and the oom-killer? |
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>> |
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> Of course, on any system with more than a few dozen MB of RAM, but I can't |
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> imagine any combination of running programs whose size could add up to even |
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> a tenth of that, with or without library sharing (somebody will be along |
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> with an example in a moment). For instance I'm running four instances of |
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> BOINC projects here, one on each core, with oodles of space to spare and no |
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> swapping. Mind you, I do have 16GB RAM :-) |
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> |
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> Having said that I ought to go and shrink my swap partitions, but my disks |
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> are only half-allocated already, so I don't see the point. |
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> |
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> |
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This sounds like me. I have 16Gbs here too. I have 1Gb of swap . . . . |
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because it has always worked for me. I should have made it 300Mbs tho. |
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The only reason I want swap is to prevent a crash long enough to maybe |
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do something about it. |
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This is just my opinion. Unless you are strapped for memory, mobo can't |
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have that much, you only need a few hundred Mbs really. All you need is |
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enough to prevent a crash and let you know when you are running short. |
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If you have a mobo that maxes out at 1Gb or something, then you may want |
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some swap with enough space to make up for the shortage of ram, |
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realizing of course that it is going to slow things down, most likely a |
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lot. |
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If my main rig starts using swap a lot, I'm going to be very curious. I |
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even used 8Gbs to put portages work directory on tmpfs. I still didn't |
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use any swap. By the way, that doesn't seem to make the compiles any |
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faster. o_O |
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One other thing, don't forget you can adjust swapiness to control how |
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bad thigns get before it starts using swap. A setting of 100 will use |
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swap in a hurry and put about anything in it. I setting of 10, 20 or |
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something means it will only use swap if it is out of ram and it can't |
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make any available. |
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Man it's hot here. |
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Dale |
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:-) :-) |
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