RE: index maintenance tracing and debugging event

By the way, I personally think that anyone who does a direct load into a table concurrently subject to an online index rebuild has worse problems than an Oracle "bug."

Perhaps the "bug" is that online index rebuild does not make a direct load attempt wait.

mwf

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Tanel Poder
Sent: Wednesday, June 19, 2013 5:41 PM
To: Josh Collier
Cc: oracle-l_at_freelists.org
Subject: Re: index maintenance tracing and debugging event

One way would be to dump redo :)
There's also a following event, which traces delayed index maintenance operations (so, possibly not every single index maintenance op, but only the bulk-delayed ones):

12837, 00000, "Delayed index maintenance debugging event"

// *Document: NO
// *Cause:
// *Action: Control dumping of debugging information for dealyed maintenanc

It's mentioned here:

*Bug 11795952 - Direct load insert may result in ORA-1 errors during concurrent online index rebuild operation [ID 11795952.8] *

*"If event 12837 is set to level 31, the we see that there are multiple rows being inserted into the index bufffer (kxib) for the same index."*

I've never used it myself, so better ask from support before running this in production ...

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*Tanel Poder*
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On Wed, Jun 19, 2013 at 9:04 PM, Josh Collier
<Josh.Collier_at_banfield.net>wrote:



> Hi,

> I am looking for an event to set that will debug/trace oracle index

> maintenance operations.  Such as the type of maintenance that occurs

> automatically when you work on a table with global indexes. I am hoping

> there is an event to set that will give me more information than what I

get


> from 10046,

>


> Thanks!

>


> Josh C.

>


> --

> http://www.freelists.org/webpage/oracle-l

>
>
>


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