RE: Insert takes too much time

Tom,

Very interesting. I'm new to Solaris, and have been less than impressed with the performance we're getting. I bought Adrian Cockcroft's "Sun Performance" book and have learned quite a bit, but I'm still not quite where I feel I need to be. We've got an EMC Array, which further complicates things because so many "traditional" I/O troubleshooting options are negated by the manner in which the array operates.

Would I be better off setting the init.ora parameter disk_asynch_io to false and using dbwr_io_slaves?

Any thoughts on this would be appreciated.

David A. Barbour
Oracle DBA - ConnectSouth
512-681-9438
dbarbour_at_connectsouth.com

-----Original Message-----
From: Tom Pall [mailto:tom_at_cdproc.com]
Sent: Thursday, November 02, 2000 3:30 PM To: Multiple recipients of list ORACLE-L Subject: Re: Insert takes too much time

By default, Solaris does async i/o. At least it tries to. The async calls fail quickly and Oracle retries with synch i/o.

Async i/o works on NT.
----- Original Message -----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Sent: Thursday, November 02, 2000 11:56 AM

> Hi all,
>
> I have two machines - NT4 (8.1.5.1) and Sun Solaris 2.7 (8.1.6). They both
> give same I/O performance outside of Oracle (on both read and write
tests).
>
> When running simple procedure that inserts 10,000 / 100,000 / 1,000,000
rows
> into a simple table without indexes, I get results 3 times faster on the
NT
> machine.
>
> Both instances have almost the same oraini. Of course the Solaris has
better
> parameters on memory and cpu parameters, as it should be.
>
> Do you have any idea why there's a slight performance difference between
the
> machines , and why the Sun is slower?! it's configuration should be at
least
> as good as the NT.
>
> Thanks,
>
> Ronen Levit
> Database team leader
> www.talmai.com
> T: +972 8 9460606 #212
> F: +972 8 9460705
> C: +972 52 448699
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Tom Pall
  INET: tom_at_cdproc.com

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