FAQ
Thanks a lot to all who have contributed their experiences and ideas for
thsi problem.
I have to look into the application and business details whether this is
feasible or not. Have to talk to our tech head.

Marul.
----- Original Message -----
To: "Multiple recipients of list ORACLE-L"
Sent: Monday, September 02, 2002 6:48 PM
Iain,

thats a fantastic idea.

Naveen

-----Original Message-----
Sent: Monday, September 02, 2002 5:28 PM
To: Multiple recipients of list ORACLE-L


Could you have a trigger which before insert, inserts into another empty
table with exactly same layout but rejects the insert on the main table.
Then disables the trigger and adds these at a non-busy stage and reenables
the trigger. Would be a whole lot quicker if it's possible.



-----Original Message-----
Sent: Monday, September 02, 2002 11:38 AM
To: Multiple recipients of list ORACLE-L


Thanks Naveen,
Lets forget about the statistics and performance, but I have such type of
requirenment than is there any way out ?

Marul.

----- Original Message -----
To: Multiple recipients of list ORACLE-L
Sent: Saturday, August 31, 2002 11:58 PM

Firstly, you are only inserting 100-400 records daily, which is not a big
deal. Even if there was a way to stop the indexes from getting updated, it
won't increase the performance by a noticable amount.

Secondly, there is no way(as far as i know) to make the indexes READ-ONLY
with the table in READ-WRITE mode.

Thirdly, rebuilding 20 indexes on a table with 1 million record will take a
long time, in comparison updation by 100-400 records is nothing.

It neither feasible nor advisable.

Naveen

-----Original Message-----
Sent: Saturday, August 31, 2002 11:08 PM
To: Multiple recipients of list ORACLE-L


Hi all,

Need to know if the following is possible in Oracle(any version):-

I have a table of around
(a) 30 Columns
(b) 20 out of 30 are indexed
(c) around 1 million (1,000,000) records.

Most of the time there will be heavy reads (select queries) on this table
except for some 100-400 records to be inserted in a day. The newly inserted
records will not be selected by the queries for the next 24 hours (this is
based on some business logic), thats for sure.

Now the problem is when ever a record(s) is inserted the entire bunch of
indexes is updated/rebuild by the Oracle which considerably slows down the
throughput of the system during that period of time (until all indexes are
updated).

Can we have a solution whereby indexes should not be updated when a
record(s) is inserted, because I know that these records will not be the
part of the query for the next 24 hrs. The indexes will be re-built
manually/scheduled during the off-peak hours once a day. In this way, the
next day, new records inserted a day before will be ready to be fetched by
the queries.

Note- I can't put my indexes offline not for a single minute during peak
hours.

Any clues?

TIA,
Marul.


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