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  #1  
Old 5th February 2006, 09:09 PM
alfa_schumi Offline
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FC4 system very slow

Hi

I just installed FC4 on my new Webserver, it has Intel P4 3.0 Ghz with hyper threading and 1 GB of RAM. But it is running very slow, in fact a lot slower than my other webserver which does not have as fast processor as this one. I am using kernel 2.6.11-1.1369_FC4smp. When I boot up the computer "Starting udev:" takes about 30-60 seconds and initializing hardware takes a lot of time also, at least a lot longer than with my other machine. I have tried using yum to update the machine (including the kernel), but it is still so slow. Does anybody know what can be the problem?

Sincerely,
Kjartan Juliusson
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  #2  
Old 5th February 2006, 09:24 PM
Firewing1 Offline
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Type dmesg
maybe there's HDD errors
Also, make sure DMA is enabled on your HD's and that there are no errors on them. Bad blocks on a HD slows it down like crazy, I once had this problem.
Also, the new kernel is
2.6.15-1.1830_FC4smp. Run a full update first:
Code:
yum update -y
Firewing1
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  #3  
Old 5th February 2006, 09:41 PM
alfa_schumi Offline
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The dmesg output is in the attached file, I am not sure what I am looking for in that output.

I will also try updating the kernel.

Sincerely,
Kjartan Juliusson
Attached Files
File Type: txt dmesg.txt (14.1 KB, 102 views)
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  #4  
Old 5th February 2006, 09:47 PM
Firewing1 Offline
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Hmm.... You HDD's seem fine, (S)ATA...
Try the kernel -- that's where I think the problem lays.
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  #5  
Old 26th February 2006, 06:24 PM
w5set Offline
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OK!!!
well running 1 gig memory on some mother boards is quite an experience.
I finally got my P4 to boot a LOT quicker with using mem=1000M at the end of the second line in the grub.conf for the kernel you usually boot into.
It was the same old story--slow booting time--measured in 10's of minutes!
But since I really wanted to use at least most of the gig of ram, I used the mem=512M to test the memory caching/limit "fix" out.
And then used mem=999M and that worked, and then tried mem=1024M which did not work, BUT using mem=1000M does work!!!!
and using the free command gives me 1011428 total now and it flies!!
As usual your milage may vary--YMMV..
Hummmm--now I wonder if using the hugemem kernel/module would help???
At least I have 98% of the installed memory working now.
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