Re: System I/O and Disk I/O

It might be, because of the disk array, test storage benchmark if you have down time avaliable, i use iozone, becuase it works on Windows and Unix, compare the data, if could lead to bad RAID configuration, I hope you didn't use RAID5, which is bad on random read/write applications.

good luck.

yinshu

penghd wrote:
> Hi there.
>
> We have a C/S OLTP system running on oracle9i.
> When we put the oracle server on a windows 2000 Server, system works
> well. From the windows monitor tool, it show the whole system I/O is
> 8MB/s, but the harddisk R/W rate only about 500KB/s.
> But when we migrate the oracle server to an IBM pserie Server(AIX OS),
> it ran slow as hell. Because we are using Disk array, we cant get the
> real R/W rate of real harddisk, but just the I/O of the Logical
> Volume, its about 8MB/s too.
>
> So I think its some problem about the CACHE (database cache or system
> cache), is it?
>
> The PC Server and AIX Server both have 2CPU 2G MEM, and the database
> init.ora are same. Is there something need pay attention on UNIX?
>
> And should we try the Multi-Thread Server Mode? There are about 200
> client. So on the AIX Server we can see 200+ Oracle Processess.
>
> Thx, and sorry about my poor English.
Received on Sat Mar 06 2004 - 07:33:34 CST