If you need a good raid they attach piece of hardware to the scsi card and "walla", you get a strong RAID card.
Damn
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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