I must say, from my own experience with RH9, it is actually much faster than my old distro (7.3). My educated guess is as good as any but it doesn't *feel* like a kernel problem (hehe, yes I am a Zen master :). I might be tempted to look into the standard C library or any other general component of the system that practically everything uses...
Eli
On Mon, 15 Dec 2003 19:07:10 +0200, Noam Meltzer <[EMAIL PROTECTED]> wrote:
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This is not the 1st time that I hear that RedHat9 is slower than earlier ver. I think that I read somewhere that the DMA of the HD is turned off in RedHat9, but maybe i'm just fantasyzing. I tried googling a little (but i don't have a lot of time right now for it), but didn't find intersting stuff. Maybe i'll have time l8er, i'll take a look at it..
Noam
Shachar Shemesh wrote:
| Hi list, | | I have a (couple of) client(s) that have performance problems | across linux distirbutions. That is - they try an operation on a | given platform with a given (redhat both cases) distribution, and | get a certain performance. Then they try the same operation on the | same hardware with a newer distribution, and get considerably lower | performance. | | In one case, the fast distro is RedHat 7.2, and the slow one is 9. | In another I'm not sure what the fast one is, but the slow on is AS | 3. I suspect that RedHat screwed something up with their newer | kernels (perhaps something incorrectly backported from 2.6?). | | So far, I have seen neither computers myself, and I only had chance | to do repetitive "try this, what now?" with one of them over the | phone. The problem is that nothing shows problems! The tasks seem | almost unrelated. In one case it's copying stuff over the net to | another computer (1:2 performance ratio), in another it's running | ./configure (1:4 ratio). In both cases, there does not appear to be | any clear-cut curlpit. In one case I asked the client to try out | the 7.2 kernel with the 8 distribution, but I don't have the | results in yet. | | The questions: a. Does anyone have a recommended benchmarking tool? | I found this page (http://lbs.sourceforge.net/), but I'd really | rather not start messing around with each and every one of those | until I find the one I like. If anyone here has prior experience, | I'd love it if you could share. b. Occasionally, I get a system | that responds "slow", but aside from a high load average, there | seems to be nothing wrong with it. CPU is idle most of the time, | etc. Any ideas how I can find out what and why is going on? | | Many thanks, | | Shachar |
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