Re: slow after upgrade to CentOS 5 (RHEL5)

[Anthony Ewell <amewell@verizon.net>]

> 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 computer C, but have no idea what I am 
looking at:

#bonnie++

Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version  1.03       ------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,++
+++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++