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Home -> Community -> Mailing Lists -> Oracle-L -> Re: HP UX-11 I/O vs Sun Solaris 2.6 I/O
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Steve,
our sys admin is using the dd command and some custom C programs to read
data from various file systems. He repeats all tests on both systems. For 8k blocks,
HP is almost 2x slower.
On the database side, we're using sql trace and tkprof. Exact same
databases, the tkprof output is exactly the same, except the IO time is
lots longer.
tony
Steve Adams wrote:
> Hi Tony,
>
> What statistics are you using to quantify the difference?
>
> Regards,
> Steve Adams
> http://www.ixora.com.au/
> http://www.oreilly.com/catalog/orinternals/
> http://www.christianity.net.au/
>
> -----Original Message-----
> From: Tony Vecchiet [SMTP:Tony.Vecchiet_at_xilinx.com]
> Sent: Thursday, July 13, 2000 8:47 AM
> To: Multiple recipients of list ORACLE-L
> Subject: HP UX-11 I/O vs Sun Solaris 2.6 I/O
>
> We are migrating to HP UX-11 from Sun Solaris 2.6 and are
> finding I/O to be real slow at the OS level on HP. We're using Oracle 8.0.5.2
> and 8k block sizes (dbblockbuffers). The Sun system uses 7200rpm disks
> and ultra scsi, the HP uses their FC60, fiber channel and 10k rpm disks.
> On both Sun and HP we are using file systems, not raw partitions.
> I'd think that the HP IO system would be faster, but it's much slower (35-50% slower).
>
> Does anyone have any ideas on what to check or do?
> thanks
>
> << File: tony.vecchiet.vcf >>
> --
> Author: Steve Adams
> INET: steve.adams_at_ixora.com.au
>
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Received on Wed Jul 12 2000 - 19:15:32 CDT
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