How to improve the write performance of the database

Question

Our application is a write intense application, maybe will write 2M/second data to the database, how to improve the performance of the database? We mainly write to 5 tables of the database.
Currently, the database get no response and the CPU is 100% used.
How to tuning this? thanks in advance.

Answer 1

Your post says more by what is not provided than by what is provided. The following is the minimum list of information needed to even begin to help you.
1. What hardware (server, CPU, RAM, and NIC and HBA cards if any pointing to storage).
2. Storage solution (DAS, iSCSCI, SAN, NAS). Provide manufacturer and model.
3. If RAID which implementation of RAID and on how many disks.
4. If NAS or SAN how is the read-write cache configured.
5. What version of Oracle software ... all decimal points ... for example 11.1.0.6. If you are not fully patched then patch it and try again before asking for help.
6. What, in addition to the Oracle database, is running on the server?
2MB/sec. is very little. That is equivalent to inserting 500 VARCHAR2(4000)s. If I couldn't do 500 inserts per second on my laptop I'd trade it in.
SQL> create table t (
  2  testcol varchar2(4000));
Table created.
SQL> set timing on
SQL> BEGIN
  2    FOR i IN 1..500 LOOP
  3      INSERT INTO t SELECT RPAD('X', 3999, 'X') FROM dual;
  4    END LOOP;
  5  END;
  6  /
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.07
SQL>Now what to do with the remaining 0.93 seconds. <g> And this was on a T61 Lenovo with a slow little 7500RPM drive and 4GB RAM running Oracle Database 11.2.0.1. But I will gladly repeat it using any currently supported version of the product.