RE: Inserts are taking time !

Marul,

Are there any bitmapped indexes on the table

Iain Nicoll

-----Original Message-----
Sent: Wednesday, September 04, 2002 11:28 AM To: Multiple recipients of list ORACLE-L

Marul,

10k records in 1 hour(3600 seconds)

1 record in 3600/10000 => approx 0.36 seconds

If your application is OLTP you'll be inserting records 1 by 1 rather than in
bulk. Which means the effect will hardly be noticed.

If you are going to insert record in bulk you can DROP and then recreate the indexes after load.

Check what takes more time.

See if there is any scope of partitioning the table, to use local partitioned
indexes.

For bulk load, disabling the constraints is also an option.

Naveen

-----Original Message-----
Sent: Wednesday, September 04, 2002 3:13 PM To: Multiple recipients of list ORACLE-L

Thanks for the immediate reply
But my requirement is such that I cannot reduce the indexes. There are lots of selects happeneing on this table based on these indexed columns. Our entire application is about to move in the production environment and we cant change our DB design at this time.

Please suggest

TIA,
Marul.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Wednesday, September 04, 2002 1:33 PM

> Yep and you have given the answer yourself. It is the number of indexes. I
> think that if the number of records increase the number of levels increase
> and slowly but surely you need to update more and more blocks. I have done
> sone tests (an oher people I am sure) that show that there is an expontial
> increase in the amount of undo and redo generated for every index that
gets
> added into the mix.
>
> You will probably see an increase in CPU time (assuming that you are the
only
> process/session on the system).
>
> Anjo.
>
>
> On Wednesday 04 September 2002 08:53, you wrote:
> > Hi All,
> >
> > We have a table which can contain more than half a million records. When
we
> > try to insert some 10k records in the empty table it get inserted in 10
> > min. but as the size increases time taken to insert also increases.
After
> > 350,000 records it takes around an hour to insert 10k records. There are
> > around 15 columns in it out of which 11 are indexed. There is one
> > concatenated function-based index on two columns of Varchar type and two
> > separate index for the same two columns.
> >
> > I have checked the free space for the tablespaces to which the table and
> > indexes are attached to. They are in two separate tbs.
> >
> > Any clues why this is happenning.
> >
> >
> > TIA
> > Marul.
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Anjo Kolk
> INET: anjo_at_oraperf.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
> --------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).
>
>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Marul Mehta
  INET: marul_at_zycus.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Naveen Nahata
  INET: naveen_nahata_at_mindtree.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Nicoll, Iain \(Calanais\)
  INET: iain.nicoll_at_calanais.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).