Kfir Lavi wrote:
Nope :P AMD is Great !!! and i definitely feel quite well with it then with IntelFirst, if you going to dump the AMD... I'm catching ;)
Seems so though not suppose to. its LSI Logic 53c1030 Fusion-MPT Dual Ultra320 SCSI.I'm going to raise some questions in order to trigger you for the fault. Are you sure that its not a hard disk bound queries? Mybe the raid is slower then the last. (faulty driver??)
The formaer one is Adaptec 2015 which suppose to be slower.
I suspect the Raid is the problem, some how its not fast as i expected it to be. im going to throw the Centos away and install a beautiful Debian Sarge 2.6.x on it :)
Is the os the same or you swiched it?Yes, the OS came with ext3 :( thugh i dont think it can take the mechine down. maybe 10% in performance.
If you swiched it, i guess you have a problem with the kernel, mybe a module or something. Try to google for xeon slowing and the kernel.
Did you swich filesystem?
kfir
On Sunday 27 February 2005 18:10, Michael Ben-Nes wrote:
Hi All
Im running a postgres server on IBM machine with 2 Xeon 3G Cpu, 3 GB Mem and Raid.
I decide to upgrade my server from dual AMD MP 2400, 2 GB mem and raid to this machine because lately my queries became slower. To my surprise the current server is even slower.
After banging my head against the wall for a day or two i noticed that when the CPU is under heavy load the actual work is small ( divided by 50% between idle and wait )
The OS is Centos Linux 2.4.21 SMP
Here is a small cut from dstat. it shows the idle and iowait ( sum of 99 ) and all the other are 1% :(
----total-cpu-usage---- usr sys idl wai hiq siq| 1 1 93 5 0 0| 1 0 49 50 0 0| 1 0 50 49 0 0| 0 0 50 50 0 0| 1 0 50 49 0 0|
Any idea what could be the problem ?
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