Messages in this thread | | | Date | Sun, 28 Sep 2003 13:33:09 -0400 (EDT) | From | "Mr. James W. Laferriere" <> | Subject | Re: [OT] No Swap. Re: [BUG 2.6.90-test5] kernel shits itself with 48mb ram under moderate load |
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Hello Ihar ,
On Sun, 28 Sep 2003, Ihar 'Philips' Filipau wrote: > Mikulas Patocka wrote: > >>>Oh, it does matter. My workstation has 1 GB RAM and 2 GB swap and I hardly > >>>see any problems with paging <g>. > >> Because your workload doesn't hit the 1GB limit. > >> Actually we just do not have fast enough I/O + CPU to utilize 1GB of > >>RAM efficiently. > >> But if you will go into 128MB of RAM - you will see difference, where > >>should be no difference. > >> Let's say (my personal exp.) cp'ing of kernel source with 0.5/0.25 GB > >>RAM dosn't differ. Aproximately the same time. 0.25GB little bit faster > >>- but it can be written off to noise. But try to do the same cp with > >>0.125GB - this cp (as of RH 2.4.20-20.9 +ext3 -swap) takes _*two*_ times > >>longer. Should it be? > > Yes, it should. If you have 0.25GB, it can be copied into cache. If you > > have 0.125GB, it doesn't fit there. > So you want to say to effectively copy (or whatever) 40GB harddrive I > have to have 40GB of RAM? Ridiculous. > Especially if copying is done in 4k lumps. (cp's default buffer) > <sarcasm flavour=sad> Hopefully not everyone shares your opinion. </sarcasm> If I am correct , I beleive he is speaking of the amount of MEMORY needed to cache the copy of file data WITHOUT a swap partit. or file . Hth , JimL -- +------------------------------------------------------------------+ | James W. Laferriere | System Techniques | Give me VMS | | Network Engineer | P.O. Box 854 | Give me Linux | | babydr@baby-dragons.com | Coudersport PA 16915 | only on AXP | +------------------------------------------------------------------+ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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