Oracle Performance Tuning for Fresher Oracle DBA

December 13, 2013 | By | 8 Comments

Oracle Performance Tuning is not tough

oracle tuning, fresher oracle dbaPeople say Oracle performance tuning is toughest part in database administration. My thought is different. If you are having deep knowledge of Oracle architecture, operating system basics, application awareness, and some basics of networking/storage then it won’t be tough for you. In short, you can be handle and ability to troubleshooting of performance issues.

Every version, Oracle adds some more parameters and changes behavior of old parameters. Always ask an question to yourself about performance issue that,“ why today and didn’t happen yesterday?”. If you are able to find out answer of this question then you will realize immediately what is actual problem and what will be solution of same issue.

“Do you think only experienced DBA can do Oracle Tuning?”

Do you understand my point? If not understood then I am explaining with an example.

Today we got complain from application team about slowness of database. Their all applications were stuck and some of applications failed with error ORA-0060: Resource busy. When I tried to login into Unix server then I observed terrific slowness because my login command was also stuck. I tried to execute some unix command for investigating like Top, PRSTAT, VMSTAT,SAR but output was reflecting after 5-8 minutes. Means server was busy. Due to this reason, I asked question to myself, “Why today and didn’t yesterday?”. This was new server and we upgraded database before 20 days back. From last 20 days all had been working very well. But from last 3 days new database was created and today full backup executed with presence of new database what did not exist before. Root cause found and issue resolved immediately.

If you are able to understand exact issue and circumstances of performance degrade then you will be able to address accurately. If root cause of slowness doesn’t find out then every effort will be useless and you won’t be able to solve performance issue. Due to these all reasons, performance tuning is art and science. You can be understand easily if you are having some basic and good knowledge of Oracle, operating system, storage, application trend, and networking about performance tuning. Only experienced DBAs are able to handle, it is absolutely wrong. Fresher Oracle DBA and intermediate DBA are also able to tune performance issue.

If you get involvement of server performance issues even though it is not Oracle related then you will get good idea and knowledge how to handle it. Sometimes, people are blaming to each other like application team blames to DBA, DBA blames to System admin, System Admin blames to storage, and storage blames to DBA. This is wrong situation and nobody will be able to address performance issue of Oracle server accurately.

Don’t worry if you are fresher Oracle DBA or intermediate DBA, just try to involve in this kind of critical situation and try to investigate. You will get success.

Wish you all the best.

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Category: Oracle DBA Training

About the Author ()

I am working as Oracle DBA from last 15+ years and certified in various Oracle certifications. I am professional faculty of Oracle DBA and providing training. I always try to build strongest career of my every student in every aspect to achieve their dream goals of life. Due to this reason, I am different type of trainer and during my training session, student gets hardware, software, network, seo, interview cracking, politics during job with course content using all practical lesson and real time scenario based training.

Comments (8)

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  1. S.Raju says:

    Exclusive blog and nice article. This kind of article is boosting our confidence as working fresher Oracle DBA. So many times I tried to tune our server but everytime I found wrong root cause of issue. But in future I will get success. Dear Gitesh Trivedi sir, kindly keep blogging for us. I am fan of you. Thanks a ton.

  2. Susan says:

    Nice article and explanation about fresher will be able to resolve performance issues. But We are not getting chance to do this task because it is monopoly of senior guys and they didn’t provide chance. What should need to do?

    • Hi,
      You can get opportunity anytime may be in presence or absent of senior DBA. Don’t loose chance to perform best. Meanwhile, try to involve in every tasks either of database or operating system specific. You would get exclusive knowledge during your involvement. If senior DBA didn’t respond then ask questions to system administrators. Wish you all the best. Keep in touch with my blog because I am going to publish more in same issue.

  3. David Fitzjarrell says:

    An ORA-00060 is a deadlock detected; an ORA-00054 is a resource busy with NOWAIT specified. The first is usually a programming error while the second indicates that an object is being accessed exclusively by another process. Mixing those error numbers and messages is confusing to any new DBA, which was not the intent of this post.

    A bit more detail in the description of the process would have been helpful to any new DBA — a ‘checklist’, of sorts, would be most beneficial in helping new DBAs begin to confidently address database performance issues.

    • If new DBA knows about ORA-00060 and ORA-00054 then what would be happening? Junior DBA will be able to get more knowledge using blogs, online forums. Proper guidance is requiring that how to gain more. Best is investigation using own checklist. It will be useful to every junior Oracle DBA.

  4. George Labane says:

    Perfectly explained monopoly of senior database administrators. I like this article. I am working as intermediate Oracle DBA in telecommunication at New York. I know tuning but never got chance in real time of database administration tasks. Every time Sr.Oracle DBA performs tuning tasks and never shares anything to us. Thanks for sharing.

  5. nitesh says:

    Hi sir, could you tell me what is the basic knowlege needed to learn oracle dba as a fresher?

    • giteshtrivedi says:

      Nitesh,

      Fresher means what? If anyone wants to learn Oracle DBA then he or she needs at least SQL basics with computer knowledge.

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