RE: Delete slowing..

[Sinard Xing]

Title: RE: Delete slowing..

Hi,

 

Perhaps you check the Indexes against that table, you can drop the index first,

you may consider a TRUNCATE TABLE command if you not need the rollback option.

 

Sinardy

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Hallas John
Sent: Wednesday, 28 November 2001 5:31 PM
To: Multiple recipients of list ORACLE-L
Subject: 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:[EMAIL PROTECTED]]
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: [EMAIL PROTECTED]
> ===================================================

'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
Performance Tools & Free Scripts
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--
Author: Stephane Faroult
  INET: [EMAIL PROTECTED]

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