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Am 25.11.2012 23:46, schrieb William Kenworthy: |
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> Has anyone tried swap on ssd? - has it killed the drive prematurely? - |
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> any other effects? |
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> |
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> I have a system that is maxed with with 4G ram and tends to use swap |
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> heavily at times which slows things down ... so I am thinking a small |
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> ssd might help here. |
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> |
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You should tell us which model you want to use. In any case, if it is |
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relatively recent, I don't think you can actually break it with write |
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cycles anymore unless you keep it 100% busy 24/7. |
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> Another slower alternative is a usb thumbdrive ... might try that later |
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> today as I have some around ... again anyone tried this and found |
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> something unexpected? |
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> |
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Thumbdrives have much simpler wear leveling. They also use triple level |
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cells (TLC) which are even worse than the MLCs found in cheaper SSDs. |
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Not to forget that USB doesn't support proper DMA and therefore |
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increases CPU load. Long story short: Swapping on thumbdrives is as fast |
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as a snail riding a turtle -- but turtles have a longer life span. |
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Another idea: |
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You can try to reduce the swap load by using frontswap with zcache. It |
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compresses memory pages in RAM which would otherwise be swapped. You |
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still need swap but less often. |
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Enable |
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FRONTSWAP |
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CRYPTO |
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CONFIG_STAGING |
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CONFIG_ZCACHE |
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then add "zcache" to your boot parameters. |
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Regards, |
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Florian Philipp |
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