Avg read time exceeded on data volume

Dear experts,
We are currently running MaxDB 7.7.04.29 on Red Hat Linux 5.1 for our BW instance.
The data and log volumes and SAP binaries are all utilizing NetApp storage, configured on a
single LUN within a single FlexVol running on a single filer. I realize this is not the desired
configuration as both SAP and NetApp recommend separating data, log, and binaries on separate
LUNs. We intend to reconfigure per said recommendation.
That said, do you think this single LUN configuration to be the source of our I/O performance problems?
If not, what other areas should I investigate?
We are getting this error from DBAN.prt, results of the db analyzer:
W2 Avg read time 32.49 ms for 1378 reads on volume /sapdb/BWP/sapdata/DISKD0001
--Erick

> I realize this is not the desired
> configuration as both SAP and NetApp recommend separating data, log, and binaries on separate
> LUNs. We intend to reconfigure per said recommendation.
>
> That said, do you think this single LUN configuration to be the source of our I/O performance problems?
> If not, what other areas should I investigate?
> We are getting this error from DBAN.prt, results of the db analyzer:
>
> * W2 Avg read time 32.49 ms for 1378 reads on volume /sapdb/BWP/sapdata/DISKD0001
Hi there!
From DB point of view, there is no way to tell why the IO performance is bad.
The best the database can do is to tell that it is bad (or good).
Anyhow, the setup you described had been one of the 'usual suspects' for IO issues - so, yes it's quite possible that your IO issues are caused by this.
I'd propose to implement the planned change and check the IO performance again afterwards.
regards,
Lars

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user633278 wrote:
Hi
I am hitting a bit of a problem when using the date datatype. When trying to save a row to the table where the field it throws an error ora 01830 and complains about converting the date format picture ends...etc. Now when I do the insert, I use the to_date function with the format of "dd-mon-yyyy hh24:mi:ss". Of course, when I remove the time element, everything is perfect.
Checking sysdate, I noticed that the time element wasn't be displayed, and I used alter session set nls_date_format to set the date and time I want to save to the table, which worked!
Then based on advice in a previous thread to permanently fix the problem, I used alter system set nls_date_format ="dd-mon-yyyy hh24:mi:ss" scope=spfile; This showed that it was altered, and I can see the setting in the em. In sqlplus, I shutdown the database, and restarted with startup mount; alter database open; and then selecting sysdate, it still shows the date as dd-mon-yy, and still no time! Checking the em, and looking up the nls_date_format the setting is still shown as "dd-mon-yyyy hh24:mi:ss".
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