Oracle 10.2.0.4 Helth Checkup

Question

Hello All,
Could you please let me know how Can I do the Helth Checkup the Oracle 10.2.0.4.
1) Monitoring the Alert log.
2) TOP
3)Archive Destinatio.
Regards,
Naresh

Answer 1

Health Check is such a vast topic, and is dependent on the situation or the time you have.
Best way is to regularly check the AWR and ADDM._
Although you can keep the following checks that my team and I have designed and use :
1. Alert Log - check for critical errors
2. ps -ef | grep pmon -- to check if your instance is up.
select name,open_mode from v$database; -- to check the mode of your database.
3. Top wait events and system statistics
4. check for any archiver process hang -- if your database is ARCHIVELOG mode or configured in dataguard.
5. Memory Stats like HITS/MISSES, Memory Sort SGA Usage etc...
6. Redo Log Switch frequency -- this will show is the switching is optimal
7. Object Locking
8. Check Invalid Objects
9. Check for Unusable Indexes
10. Size of the AUD$ table, and it's tablespace free size -- this is very critical - as it's uncontrolled growth can cause denial of service (DoS).
11. Free/Used Space information - OS and Tablespace
12. UNDO Tablespace Information - Expired, Unexpired and Free segments
13. Long Running Queries
14. Recyclebin Contents
15. unclean processes
16. AWR, ADDM and ASH reports
Regards,
Rizwan Wangde
Sr. Oracle DBA
http://rizwan-dba.blogspot.com