From: "Ihar 'Philips' Filipau" <filia@softhome.net>
To: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [OT] No Swap. Re: [BUG 2.6.90-test5] kernel shits itself with 48mb ram under moderate load
Date: Sun, 28 Sep 2003 19:21:23 +0200 [thread overview]
Message-ID: <3F771893.1020405@softhome.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0309281747460.13202@artax.karlin.mff.cuni.cz>
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>
--
Ihar 'Philips' Filipau / with best regards from Saarbruecken.
--
"... and for $64000 question, could you get yourself vaguely
familiar with the notion of on-topic posting?"
-- Al Viro @ LKML
next prev parent reply other threads:[~2003-09-28 17:19 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <ArQ0.821.23@gated-at.bofh.it>
[not found] ` <ArQ0.821.25@gated-at.bofh.it>
[not found] ` <ArQ0.821.21@gated-at.bofh.it>
[not found] ` <ArZC.8f1.9@gated-at.bofh.it>
2003-09-27 19:59 ` [OT] No Swap. Re: [BUG 2.6.90-test5] kernel shits itself with 48mb ram under moderate load Ihar 'Philips' Filipau
2003-09-27 20:13 ` William Lee Irwin III
2003-09-27 20:25 ` Roger Luethi
2003-09-29 5:02 ` Nick Piggin
2003-09-29 5:08 ` William Lee Irwin III
2003-09-27 20:21 ` Roger Luethi
2003-09-28 13:06 ` Ihar 'Philips' Filipau
2003-09-28 15:52 ` Mikulas Patocka
2003-09-28 17:21 ` Ihar 'Philips' Filipau [this message]
2003-09-28 17:31 ` Mikulas Patocka
2003-09-28 17:54 ` Ihar 'Philips' Filipau
2003-09-28 18:04 ` William Lee Irwin III
2003-09-28 17:33 ` Mr. James W. Laferriere
2003-09-28 17:57 ` Ihar 'Philips' Filipau
[not found] <Apl1.4ur.9@gated-at.bofh.it>
[not found] ` <Ar3B.6UW.21@gated-at.bofh.it>
2003-09-27 18:13 ` Ihar 'Philips' Filipau
2003-09-27 18:27 ` Roger Luethi
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