James Bottomley wrote:
Please don't drop the cc lists. There are others who probably have more
informed opinions than I do who won't get to comment if they don't see
it.
On Sun, 2007-10-28 at 17:36 -0700, Anthony Ewell wrote:
James Bottomley wrote:
On Sat, 2007-10-27 at 13:21 -0700, Anthony Ewell wrote:
James Bottomley wrote:
On Wed, 2007-10-24 at 18:04 -0700, Anthony Ewell wrote:
Hi All,
If you all would not mind a post from the general
public Linux user, after doing a complete disk wipe
of CentOS 4 and installing CentOS5, my system is preceived
to be 3 times slower.
Did some test from my install CD/DVD's in "rescue mode" on
Computer C. I used the same backup script (dump) that
I use in normal boot mode. I stopped the backup
after dump gave the first estimate of time:
"dump" CentOS5 install DVD in rescue mode:
transfer rate 4422 KB/s, estimated finish 4:10
"dump" CentOS4.4 (2.6.9-42.EL) install CD in rescue mode:
transfer rate 8468 KB/s, estimated finish 2:09
I also got a "dmesg" from computer B, as requested by Sumant.
Computer B: VXA-3, CentOS 4.5 , SATA-150-4
-T
Hi All,
I also tested using the System Rescue CD from
http://www.sysresccd.org.
I used the same backup script (dump) that I use in normal
boot mode. I stopped the backup after dump gave the first
estimate of time:
"dump" System Rescue CD (Kernel 2.6.22.9):
transfer rate 4370 KB/s, estimated finish 4:15
So, I would say, the problem is not confined to CentOS 5,
but goes all the way up to the 2.6.22.9 kernel. I hope
this is a good clue.
-T
Hi All,
I ran a "bonnie++" on both Computer B and computer C.
I am not seeing any massive differences between the two
that would account for the massive slowdown between
Cent OS 4.4 (2.6.9-42.EL) and Cent OS 5 (2.6.18-8.1.15.el5).
Anyone have any suggestions as to how to track this
down?
Many thanks,
-T
Comparison of Computer B and Computer C with "bonnie++":
Computer B (CentOS4):
------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
server.foo.lo 4G 31384 70 46283 16 21902 8 40179 82 49199 9 196.8 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 23106 71 +++++ +++ +++++ +++ +++++ +++ +++++ +++
+++++ +++
server.foo.local,4G,31384,70,46283,16,21902,8,40179,82,49199,9,196.8,0,16,23106,71,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
Computer C (CentOS5):
------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
/sec %CP
rn1.foo. 4G 32240 68 40951 9 24177 5 46265 86 71005 9 179.5 0
------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
/sec %CP
16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
+++++ +++
rn1.rent-a-nerd.local,4G,32240,68,40951,9,24177,5,46265,86,71005,9,179.5,0,16,++
+++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++
-
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