RE: Delete slowing..

Mark, something else to add to your list of things to check Does a FTS of the table take a long time as well? If so I would try re-creating the table to remove the space left by previously deleted rows.

John

-----Original Message-----
From: Stephane Faroult [mailto:sfaroult_at_oriole.com] Sent: 27 November 2001 19:55
To: Multiple recipients of list ORACLE-L Subject: Re: Delete slowing..

Mark Leith wrote:
>
> Hi list people :)
>
> We have a customer who has been running a particular delete statement
> against a table for a while now, which usually ran within minutes. All of a
> sudden this table has suddenly gone from a few minutes right up to 50! He
> wants to diagnose why..
>
> Where would you start?
>
> I have a few ideas of my own - like stale stats, small rollback segments
> etc. - but am after some of your advice also before I get back to him
> tomorrow morning.. Not sure on the Oracle version, OS, or even amount of
> rows he is deleting or size of the table (yet, I'll find this out tomorrow),
> but there has to be a pretty standard way of diagnosing this..
>
> All help appreciated.
>
> Mark
>
> ===================================================

>  Mark Leith             | T: +44 (0)1905 330 281
>  Sales & Marketing      | F: +44 (0)870 127 5283
>  Cool Tools UK Ltd      | E: mark_at_cool-tools.co.uk


> ===================================================

'We have done nothing and suddenly it's slow' is a well known tune. Usual suspects :

    1) Stats, computed or deleted
    2) Dropped index
    3) Newly created trigger
    4) Locks. Nobody doing DML on the same table during the delete ?

-- 
Regards,


Stephane Faroult
Oriole Corporation
Voice:  +44  (0) 7050-696-269 
Fax:    +44  (0) 7050-696-449 
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Author: Stephane Faroult
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