I have a 180GB database. and have a large table in it. 

table's DDL is:

Create Table Table1

(

   f_MeterID Integer,

   f_CMDID smallInt,

   f_Time timestamp,

   f_Value Numric(12,2),

   f_RecTime Timestamp

);

Create Index idx_Table1 on(f_MeterID, f_CMDID, f_Time)

about 50,000 rows be inserted every hour. 

about 1.2 millions rows be inserted every day. 

about 500 millions rows every year.

CREATE GLOBAL TEMPORARY TableTemp (
     f_MeterID Integer,
     ....
) ON COMMIT DELETE ROWS;

ALTE R INDEX idx_Table1 INACTIVE;

I insert data use follow:

1. start a transaction

2. Insert a batch records into temp table TableTemp, It's structure like table1

3. Insert into Table1 select * from TableTemp

    Delete Data From TableTemp

    (about 30,000 record every tiime)

USE GLOBAL TEMPORARY

4. commit transaction

ALTER INDEX idx_Table1 ACTIVE

but now, insert data become very slowly.

What should I do?

thanks!

jimmy

Regards.