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• Oracle Application Performance Tuning

  Hi all
  Please forgive me if I'm asking this in the wrong section.
  
  I'm an engineer s/w with 2 years exp. I worked as a tuning performance for Oracle EBS resource in my company. Jobs in question especially SQL tuning and treating indices etc. At the moment I took interest in s/n things, and I finished my TRAY in Oracle 10 g. Now, my company gives me the opportunity to move to a team of DBA of the Application and I'm totally confused about this.
  
  Becoming a DBA Apps means that the effort that I put in the certification in 10g will be of no use. There are other Apps DBA certification documents. I should stay put in performance tuning & wait for a chance to base DBA or I will accept the opportunity to Apps DBA.
  
  Also, did my exp. in SQL tuning performance hold any value as such with exposure to activities of s/n?
  
  Please guide me in this matter I am very confused right now.
  
  Kind regards
  Lucette

  Lucette wrote:
  Hello bigdelboy, thank you very much for your answer.

  Yes, I meant by oracle Apps DBA Oracle EBS.

  1Z0-046 clearing, is an option. However, my question is will delete both reviews the Admin I and Admin II being of any help, bypassing the expericnce practice? The EBS DBA work involves support and patching, cloning and installation of the new node etc.

  Also, is my performance tuning experience will help me somehow on the way forward as a DBA / EBS DBA?

  Thank you for your valuable time.

  Kind regards
  Lucette Sarath

  The way I read it is that.

  People notice that you are able to understand and SQL performance. And you must have some knowledge of Oracle EBS. And in fact, you also have a DBA OCA.

  So, there are 98% + chance you can be transformed into a good Oracle Apps DBA (and the core s/n). If I was in their position I want you on my team. It's the way we used to bring on DBA in the old days before approval, and he still has a lot of merit. OK you can only do tasks limited at first... but the number of taks you can do will increase substantially in recent months.

  I imagine that the Oracle Apps DBA will be pleased to have a person on board who can tune SQL which sometimes can sometimes seem more like an art than a science of performance. The application of patches, etc. can be taught in small doses. If they are a good team, they're not trying to give you all at once, they'll get to learn one procedure at a time.

  And remember, if in doubt ask. and if you do not understand ask again. And be safe and not sorry on actions that could be serious.

  .................

  If your fear on liinux: recipes of Linux for Oracle DBA (Apress) might be a good book to read but can be expensive in India
  Same: (Oracle Applications Dba field Guide) can agree, and the same (Rman recipes for Oracle Database 11 g A problem-solution approach) can have some value if you need to get fast speed in these areas.
  They are not perfect, but they sometimes have to consolidate the information carefully; However only buy if you think they are pretty cheap. You can buy them well and feel disappointed (these all is found by Apress which have produced a number of good books... they also published some waste as well)

  And review the dba examples 2 days as well and install examples n OTN linux so... they are free from books I mentioned.

  Rgds - bigdelboy.

• can I use "Oracle Database 12 c: performance management and Tuning" training for the certification "Oracle Database 11g: Performance Tuning 1Z0-054 '"»

  I took "Oracle Database 12 c: new performance management and Tuning" the oracle University training. Now I would like to get certified on "Oracle Database 11g: Performance Tuning 1Z0-054 ' exam. Is this possible?

  I guess you ask if you can use the course 12 c as long as the condition of course for the review of 11g.  Over 12 c is not listed as one of the options for the 11 g certification and course requirements are normally specific version - at least with DBA certifications.  If you are already an Oracle OCP DBA, of course, there is no requirement of course for the review of performance tuning.  From what I know the training requirements for other certifications, I do not that you will be able to use it. However, Brandye will provide a definitive answer to whether the course 12 c would be acceptable for 11g certification.

  That said, I'm with John - 12 c review is about a community of 85 to 90% in the review of the 11g and is currently about 20% of the price while it is in beta.  What is the point of trying to cross the releases?

• 1Z0-054: Oracle Database 11g Performance Tuning Expert

  I intend to give the exam 1z0-054 for the certification, "Oracle Database 11g Performance Tuning Expert".
  
  The path to Certification indicates that, if you are 'OCP DBA 11 g' then you can directly take this article and there is no requirement for training instructor. Therefore, I decided to prepare my own. Can someone guide me on study material and landfills?
  
  Kind regards
  
  Ahmer Mansoor

  Therefore, I decided to prepare my own. Can someone guide me on study material and landfills?

  First of all, the word "shock" has a precise meaning. It is short for "landfills of brain", which are illegal and can cost you this certification and all others you have taken.

  http://blogs.Oracle.com/certification/entry/0477

  Second - there is currently no study guide or a specific book to this certification at the moment. I write the study guides and this one is actually next on my list when I finished the current book to * 1Z0-117: Oracle Database 11 g Release 2: SQL Tuning *. I have a guide for 1Z0 - 054 before sometime in may more likely. That said, I have a few links for legal study on the companion Web site material for my series of guide to the subjects for this exam. It also has links to the Oracle documentation that contains the information you need. Once I have started writing the book review, links will develop quickly because I research for her themes and links to the documentation could extend as well.

  http://www.oraclecertificationprep.com/Apex/f?p=OCPSG:EXAM_DETAILS:0:no:P2_EXAM:1Z0 - 054

• Dates for "Oracle Database 11g: Performance Tuning" exam

  Hello!
  
  Today Oracle posted the info on the new database Oracle 11 g Performance Tuning review required for new certification expertise:
  
  http://education.Oracle.com/pls/web_prod-PLQ-dad/db_pages.GetPage?page_id=41 & p_exam_id = 1Z0_054 #2
  
  It is said that pre-registration for the beta version review starts today, however, it does not say when the phase beta begins and ends. Anyone know?
  
  Thank you
  Marcus

  March 31, 2009 is the current provisional end date for the exam in beta 1Z1-054. This date is subject to change.

  Kind regards
  Brandye Barrington
  Certification Forum Moderator
  Manager certification program

• Benchmark of Performance space Oracle to ESRI vs Oracle EE vanila

  Do we not have any indicators to improve performance, compare performance with Oracle EE database as the back-end, vs Oracle Spatial with ESRI ArcGIS of ESRI (especially during the edition of map).

  Just to add my $0.02, what has already been said...

  We use the SDO_GEOMETRY and the ST_GEOMETRY of ESRI here. Hands down, SDO_GEOMETRY is faster - returned from the database. No contest.

  HOWEVER - this is not what the user. What they perceive as database performance, it's the speed at which Arc attracts some data on their screen. That's where the problem lies. We found in many cases, their ST_GEOMETRY format (like their old format BINARY SDE) restores at least an order of magnitude or more quickly, even if it takes more time for the database to extract the data and send it back.

  Frankly, their SDO_GEOMETRY rendering support was always very bad, and it still shows. Screens of the application of GIS Java web start developed 10 years ago by using the old Java 2D makes shots even away from the CRA API anything in terms of rendering performance, even in 4 K. I'm talking of second vs 58 seconds for an index of comparison I did with 10.3. Sharp zooms smooth zoom blur clumsy vs. In this case, the database returns the data in less than 1/10 of a second. The rest of the time was stack all - and in the case of our application, which involves a medium level and client VS the arcmap client/server model. AND - which is also including time to math for POI lat - lon on the fly that extends to every latitude square grids.

  Again - the perception is reality to end users. In our experience, Oracle is faster with SDO_GEOMETRY. But their application code is almost always much faster with their native format - and this is the real bottleneck here.

  Bryan

• optimization of the performance of Oracle 9

  I read the paper on the optimization of performance for Oracle 9. Unfortunately, my production db is version 10. My question is: to what extent can I rely on this old book Oracle? TX
  
  Published by: Indra Budiantho, Sep 11, 2012 20:48

  Hello

  Oracle 10g has several new features for performance, such as dbms_xplan.display_cursor, then a book 10 g AWR/ASH etc is usually better in your case. However, some tuning books are forever for example (Milsap and Holt) and it does not really matter tht they speak of same 8i or 9i.

  Best regards
  Nikolai

• Tuning Oracle Applications 11i start with

  Hi Hussain/Helios,
  
  I am new to Oracle APPS and works in oracle applications 11i 11.5.10.2 with 10.2.5.0, the database and the application was promoted by the previous dba. that has left almost 3-4 months before.
  now my question is I want to have an optimization of performance for Oracle applications environment, can you please suggest some key points for leave and some good links for future use.
  
  Another thing is I used the command find on my linux machine and found several log files that are greater than 1000K on level (forms, reports, web) and similiarly db level (db/admin/simultaneous) apps.
  
  can I just remove all of these log files using the operating system command (rm) and is it feasible with the production environment on the mode of operation or is it not possible and I should use some other ways, etc.
  
  

  APPS Tier folder locations.
  
  ****podappl/admin/PROD/log
  ****prodora/iAS/Apache/Apache/logs/sec_audit.log
  ****prodora/iAS/Apache/Jserv/logs/mod_jserv.log
  ****prodora/iAS/Apache/Jserv/logs/jserv.log
  ****prodcomn/admin/scripts/PROD_****/sqlnet.log
  ****prodcomn/admin/log/PROD_****/
  ****prodcomn/_pages/
  ****prodcomn/rgf/PROD_****/
  ****prodcomn/rgf/PROD_****/oam/
  
  DB Tier files folder locations.
  
  ****oracle/proddb/10.2.0/oc4j/j2ee/OC4J_DBConsole_*****_PROD/log/em-application.log
  ****oracle/proddb/10.2.0/oc4j/j2ee/OC4J_DBConsole_*****_PROD/log/http-web-access.log
  ****oracle/proddb/10.2.0/oc4j/j2ee/OC4J_DBConsole_****_PROD.upgrade/log/http-web-access.log
  ****oracle/proddb/10.2.0/appsutil/log/PROD_****/StageDBTier_10161830.log
  ****oracle/proddb/10.2.0/*****_PROD/sysman/log/emoms.log
  ****oracle/proddb/10.2.0/*****_PROD.upgrade/sysman/emd/sqlnet.log
  ****oracle/proddb/10.2.0/******_PROD.upgrade/sysman/log/
  ****oracle/prodappl/admin/PROD/log/

  For the performance tuning, this time I followed points with me.
  (1) compile APPS Schema in maintenace that I take.
  (2) I checked some work to collect Stats/Purge is already scheduled for maintenance.
  
  Please tell me what other jobs I plan using OAM for weekend for all levels in applications.
  
  Also asked me to apply the latest patches on PROD APPS/DB / * system, I can check using sql, what patches are applied, but how do I know what patches are needed, (don't know about licensed products with ask never political here).
  
  Thank you
  REDA
  
  Published by: 870344 on July 5, 2011 06:36

  Hi reda

  Also asked me to apply the latest patches on PROD APPS/DB / * system, I can check using sql, what patches are applied, but how do I know what patches are needed, (don't know about licensed products with ask never political here).

  First check that you are on the first level.

  Please see:

  How to check, what EBS Techstack Patchsets were applied to 11i or R12? [390864.1 ID]

  Also you can check:
  How to check if certain Applications Oracle product/module is implemented? [443699.1 ID]

  You can check on metlaink > patches & updates > patch recommended R11 and can also check

  Especially if you work with r11 that the latest level of technology is rup7 and you can move your db to 11.2.0.2(If vous devez travailler sur 10 g lastest niveau 10.2.0.5)

  Respect of
  HELIOS

• Will there be any tools avialable to the on query performance tuning

  Hello
  
  How to tune a database query?
  Suppose that there are basic query "select * from emp where empid = '1101' ';"
  
  Y at - it all avilabale tools to suggest performance Tuning on a query?
  
  How can I resolve this application, and what is the best approach on this?
  
  Please share your ideas and thanks.

  Oracle provides tools such as SQL Trace and TKPROF. For the information on a SQL query.

  But basically, you should know how oracle works. You must be aware of the different access plans and know why they are being used.

  You need to know when to use an index and when not to use a.

  There are many more. Best thing for you would be to start reading the document.

• Foglight performance tuning - Cache Code JVM

  Just curious about this setting. Currently, our new FMS are amazing. But I noticed this option in the field guide. No indication on that? The docs a bit thin. When I use it? What is the default if I don't specify? How to monitor the need to increase this?

  Performance Tuning field Guide

  To optimize the execution of code in larger environments, you can increase the size of the

  JVM code cache.

  To increase the size of the JVM code cache:

  1 open /config/foglight.config.

  2. change the line foglight.vm.option0 as follows:

  Foglight.VM.option0 = '-XX:ReservedCodeCacheSize = 128 m "

  3. restart the management server.

  The default setting is different based on the platform of the JVM.

  It is default to 1024 m on 64-bit systems or 32 m on most systems except Solaris where it could be 48 m.

  It sets the size used by the cache code during compilation JIT compiler. If this cache is small you will receive errors like this in the log file

  Java HotSpot(TM) Client VM warning: CodeCache is full. Compiler has been disabled. Java HotSpot(TM) Client VM warning: Try increasing the code cache size using -XXReservedCodeCacheSize=

  And it allows to disable the JIT compiler, which will result in reduced performance because all dynamic logic as rules and other groovy scripts will no longer be dealt with by the JIT.

  The default settings will work in most cases, but a big FMS with many objects and rules may require a greater reserve of cache to keep the happy JIT compiler.

  Stefan

• performance on oracle db - session

  Hi experts,
  I am a newbie of oracle db.
  I need to test the performance on oracle db.
  I use oracle 10g Enterprise to test.
  
  I use applications to fire 15 different sqls in db almost at the same time.
  
  the sqls are almost the same. only the period filter where clause are different.
  
  I saw that on the EM (Business Manager).
  
  There are only 10 sessions.
  
  But I'm on fire 15 sqls.
  
  the db can only manage 10 sessions at the same time?
  
  can it be configured to manage multiple sessions at the same time?
  
  There are 2 CPUs in the database.
  
  If there is 4 processors in the comic book, it can handle more sessions?
  
  Or she calculates faster?

  Forreging wrote:

  Here is the captured table of enterprise manager.
  http://img266.imageshack.us/img266/3520/TopAct.PNG

  I don't use a lot of Enterprise Manager (the company I get too stopped years ago cost licensing reasons). Also, I remember seeing less precise data the old based on Java Enterprise Manager - so I prefer rather to look directly the views v$ performance instead.

  When there are 15 sqls to run, I found that it runs 10 sqls first (I guess that 1 sql occupies 1 session)

  A SQL looks like a source code of the program. Oracle receives it, analysis and it compiles and creates a '+' binary running program + for him - a bit like a C compiler will compile C code. This program compiled in Oracle is called a cursor. It is stored in the shared pool. This "compilation" is called a difficult analysis.

  If another session sends the same source code SQL to Oracle, it does not compile a new cursor for this - he sees that there's already a compiled copy (cursor) for this SQL source and re - use this slider. It's called a soft analysis.

  If all 15 SQLs are the same, so there will be a single slider in the shared pool. One of these 15 sessions will show a difficult analysis. The other 14 sessions will show a fresh analysis.

  One of the fundamentals for the scalability and performance of Oracle is to use this feature of Oracle properly. Have Oracle hard analysis a SQL once and then everything just use and reuse this slider again. The same session. Other sessions. (This also requires correctly using bind variable with SQL)

  and the first 10 sqls were executed, it runs the next 5 sqls.

  To be honest - I wouldn't bother with Enterprise Manager in this case. It is much simpler and easier to just put a couple of SQL * scripts together.

  in fact, I just need to monitor performance on db.

  Why? For what reason? What metrics are to be considered? And if a metric like "+ buffer Cache Hit Ratio +", explains 90%, what does that mean? How do you determine that it is good or bad?

  You should know what requirements and commercial reasons are for this "performance monitoring" - because if you don't know what the needs/problems/issues are detailed... How the hell can correctly solve you these? A solution is only as good as the definition of the problem.

  And this applies to monitoring the performance too.

  How handles when there are so many simultaneous tasks

  15 sessions are few concurrent tasks.

  With regard to how Oracle handles - it depends on how connect these sessions (the process template can be shared or dedicated server), and how these processes?

  To understand the basics behind all of this, you must read the guide to the Concepts of Oracle® database .

• ORACLE PERFORMANCE TUNING TRAINING

  Hello world
  
  Can someone guide me how to learn optimization performance with examples, because when I followed the oracle doc it is little bit difficult for me to understand.
  
  
  Kind regards
  
  Vikas Kohli
  
  Published by: Vikas Kohli on August 30, 2011 15:40

  Vikas,

  To go through 2 day PT guide?

  http://docs.Oracle.com/CD/E11882_01/server.112/e10822/TOC.htm

  It is a good starting point if you know DB concepts very well. I also suggest reading the Concepts guide.
  http://docs.Oracle.com/CD/E11882_01/server.112/e25789/TOC.htm

• Oracle Performance Tuning

  Hi all
  Can someone give me a good article explaining oracle performance, given gurd, rman and RAC.
  Although I worked on this subjects I am unable to answer a question in interview as
  How do you analyze your database? / How give you your DB... etc.
  
  First response would be appreciated.
  
  Thank you.
  
  
  Kind regards
  Rajini.

  Hi me;

  Please also check Learning Library for your documents need question
  http://Apex.Oracle.com/pls/Apex/f?p=44785:2:0:2:P2_GROUP_ID:1000

  Respect of
  HELIOS

• Oracle Database 11 g: performance tuning

  I would like to know, if this certification Oracle Database 11g: performance optimization is only for those who is employed by a specialist of the Oracle partner, or anyone who has spend the exame can have this certification
  
  Best regards

  Hello

  For what is the CA Certified Specialist certification, who earn this certification? the company or the employee?

  Please see these links.

  CA launches new levels of partner Oracle, "OPN" specialized
  http://blogs.Oracle.com/certification/2009/12/0127.html

  OPN certified specialist railways
  http://education.Oracle.com/pls/web_prod-PLQ-dad/db_pages.GetPage?page_id=342

  If I work in a company that is a member in the OPN, business certification, not me?

  In my view, that deserves both. Here are the links mentioned above:

  The Oracle Certification candidates who provide their OPN company identification number when you register for and successfully select Oracle Certification exams - in addition to winning the basic certification - also handed the Oracle Partner Network Certified Specialist designation for this area also.

  And I need to be an OCP 11 g before I can earn this certification?

  Is this correct?

  OK, you should have a prior certification 'Oracle 11 g DBA OCP' before obtaining this certification.

  Kind regards
  Hussein

• 1Z0-024 1Z0-054 vs Performance Tuning

  Hello

  obiously, they are tests for very different versions (8i vs 11g), but if you take that into consideration, I think they are very similar... But in Oracle 8i you had to pass 5 exams (Yes FIVE!) If you want to get your OCP. Today, you get 11G OCP with 3 tests... and if you pass 1Z0-054 you have one cerfitication others...

  Is this true?

  Are different so the two reviews?, it seems that they are very similar (all similar which can be oracle 8i and oracle 11g)

  Anyone who has had 1z0-024 (there are almost 13 years) took 1z0-054?

  Concerning

  Is this true?

  I guess that what you are asking to be true is that the 11g OCP requires three exams (TRUE) and passing the 1Z0 - 054 you grant OCÉ certification in addition to the 11 g OCP (also TRUE).  Theoretically, you could also win the 11g tuning certification without an OCP, but there're so much, we need practical training that must also be met.

  Are different so the two reviews?, it seems that they are very similar (all similar which can be oracle 8i and oracle 11g)

  Well, I don't have a handy list of topics for 1Z0 - 024, so I'll work from subjects for 1Z0 - 054 and extrapolate. First of all, I will list some of the topics in 054 which are features that did not exist in 8i:

  Automatic maintenance AWR, ADDM, tasks, reports of ASH, database Resource manager, planner of the Oracle, SQL tuning automatically, planning Plan SQL, SQL Performance Analyzer, Database Replay, Automatic Shared Memory Management, automatic memory management, space management auto Segment, Segment retractable, Automatic Storage Management, Statspack.

  Please note that the list above is perhaps not complete.  I might have missed some.  However, I think I can answer your question with confidence, saying: "Yes - the two reviews are very different."