WebServices API performance test. BB10

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• Vista performance test

  all my rankings are 5.9 on the performance test, but my memory is 5.6.i have 4 GB, channel double sli memory 800mz and oc my fsb to 1333mz.how can I improve my memory? I read that vista 32 only supports memory.so total 4g add more ram will not improve this right? any advice would be great.
  Thank you
  gtw3

  Hello

  There are a few things you can do to make the system more fast/more attentive.

  Be careful that a lot of these programs and services really needs to run and often remove some
  contributes little to the speed of the machine while making the less friendly machine to use.

  How to troubleshoot a problem by performing a clean boot in Windows Vista
  http://support.Microsoft.com/kb/929135
  How to troubleshoot performance issues in Windows Vista
  http://support.Microsoft.com/kb/950685

  Optimize the performance of Microsoft Windows Vista
  http://support.Microsoft.com/kb/959062
  To see everything that is in charge of startup - wait a few minutes without doing anything - then right click on the task - bar
  The task manager - take a look at stored by - Services - process - it is a quick reference (if you have
  a small box in the lower-left - show for all users can check only).

  How to check and change Vista startup programs
  http://www.Vistax64.com/tutorials/79612-startup-programs-enable-disable.html

  A quick check to see that load method 2 is - using MSCONFIG and then display a list of the people here.

  Method 1 using Windows Defender will tell you more specific information about each program.

  ---------------------------------------------

  It's a little more complicated that you might have a few running services that you can do without.
  Be careful by disabling a service may impact the ability of other agencies to run and cause problems of
  on the road.

  Also some programs add services that might not really need to start automatically. You can
  often these type services put manual to reduce their impact on performance.

  To see these compare these in Start - type in the search box-> find Services at top right click RUN AS ADMIN
  to those of the default Vista as indicated here by BlackViper. Ignore and who are on the disabled (which do not run) or
  Manual (which work only on request) - for any automatic or automatic delayed start you can post here if
  you need help to decide if you should run. Some of these can be assigned to manual and stop so that the calling program can run them as needed.

  BlackViper made also some improvements to default windows services but I wouldn't do those unless you
  really understand the full meaning of change a default service. Then use it as a tool to compare.

  Windows Services - list by default.
  http://www.blackviper.com/WinVista/servicecfg.htm

  -----------------------------------------------------------

  Here are some tools that will help in the future that gain you experience even if the methods above will do what
  you have to do for now.

  Window Watcher - free - do you know what is running on your computer? Maybe not. The window Watcher says it all.
  reporting of any window created by running programs, if the window is visible or not.
  http://www.KarenWare.com/PowerTools/ptwinwatch.asp

  Many excellent free tools and an excellent newsletter at Karenware
  http://www.KarenWare.com/

  Process Explorer - free - find out what are the files, registry keys and other objects processes have opened, the dll
  they loaded and much more. This exceptionally effective utility will show you even owned by each process.
  http://TechNet.Microsoft.com/en-us/Sysinternals/bb896653.aspx

  Autoruns - free - see what programs are configured to startup automatically when your system boots and you
  opening of session. Autoruns also shows you the full list of registry and file locations where applications can configure auto-
  start the settings.
  http://TechNet.Microsoft.com/en-us/sysinternals/bb963902.aspx
  Process Monitor - Free - monitor the system files, registry, process, thread and DLL real-time activity.
  http://TechNet.Microsoft.com/en-us/Sysinternals/bb896645.aspx

  There are many excellent free tools from Sysinternals
  http://TechNet.Microsoft.com/en-us/Sysinternals/default.aspx

  WhatsInStartUP - free - this utility displays the list of all applications that are loaded automatically when Windows
  starts. For each request, the following information is displayed: Startup Type (registry/Startup folder).
  The command - line String, product name, file Version, company name, location in the registry or the file system, and
  more. It allows you to easily disable or remove unwanted programs that runs in your Windows startup.
  http://www.NirSoft.NET/utils/what_run_in_startup.html

  There are many excellent free tools to NirSoft
  http://www.NirSoft.NET/utils/index.html

  -------------------------------------------------------
  Another thing that helps performance is updated drivers - Vista like the updated drivers.

  This is my generic how updates of appropriate driver:

  For drivers, visit manufacturer of emergency system and of the manufacturer of the device that are the most common.
  Control Panel - Device Manager - Display Adapter - note the brand and complete model of your
  video card - double - tab of the driver - write version information. Now click on UPdate Driver (this
  cannot do anything as MS is far behind the certification of drivers) - then do a right click - Uninstall - REBOOT
  This will refresh the driver stack.

  Repeat this for network - card (NIC), Wifi network, sound, mouse, and keyboard if 3rd party with their
  own the software and drivers and all other main drivers that you have.

  Now go to the site of the manufacturer of system (Dell, HP, Toshiba as examples) (restoration) and then of the manufacturer of the device
  (Realtek, Intel, Nvidia, ATI, for example) and get their latest versions. (Look for the BIOS, Chipset and software)
  updates on the site of the manufacturer of the system here.)

  Download - SAVE - go to where you put them - right click - RUN AD ADMIN - REBOOT after each installation.

  Always check in the Device Manager - tab drivers version you install actually shows up. This
  because some restore drivers before the most recent is installed (particularly that audio drivers) so install a
  pilot - reboot - check that it is installed and repeat if necessary.

  Repeat to the manufacturers - BTW on device at the DO NOT RUN THEIR SCANNER - manually check by model.

  Look at the sites of the manufacturer for drivers - and the manufacturer of the device manually.
  http://pcsupport.about.com/od/driverssupport/HT/driverdlmfgr.htm

  How to install a device driver in Vista Device Manager
  http://www.Vistax64.com/tutorials/193584-Device-Manager-install-driver.html

  If you update the drivers manually, then it's a good idea to disable the facilities of driver in the Windows updates,
  This leaves ONE of Windows updates, but it will not install the drivers who are generally older and cause
  questions. If updates offers a new driver and then hide it (right click on it) and then go look for new ones
  manually if you wish.

  How to disable automatic driver Installation in Windows Vista - drivers
  http://www.AddictiveTips.com/Windows-Tips/how-to-disable-automatic-driver-installation-in-Windows-Vista/
  http://TechNet.Microsoft.com/en-us/library/cc730606 (WS.10) .aspx

  ------------------------------------------------------------------

  ReadyBoost can help, more RAM, and ReadyBoost is even better and RAM is pretty cheap these days.

  The max supported in Vista readyboost drive is 4 GB - if you get a larger drive 4 GB you can use the
  rest for storage.

  You need a very fast car and pay little attention to the demands of the manufacturers that they are ready for ReadyBoost as
  even some slow readers claim that.

  ReadyBoost does make a difference
  http://www.PCSTATS.com/ArticleView.cfm?articleid=2160

  How to find clues of speed readyboost
  http://www.techcrater.com/2007/04/06/how-to-find-ReadyBoost-speed-rating/

  Flash memory speed list
  http://www.techcrater.com/2007/04/05/ReadyBoost-Flash-memory-speed-list/

  I use a SanDisk titanium and it does pretty well - check speed ratings users get to the Techcrater to
  help to choose the brand.

  Hope these helps.

  Rob - bicycle - Mark Twain said it is good.

• Geofencing APIs on devices BB10

  Is it possible to operate the Geofencing APIs on devices BB10 yet? I thought that we would be able to do after this OS August update. But it takes 10.2 API to run this API the devies does not yet support y at - it another way? Thank you.

  If you mean for development purposes, run the last alpha version of dev for 10.2.

  If you mean deploy, then no, it's not out until 10.2 is released.

  You could free with just 10.2... I think that at this time something like 15% of users are already on it... Judging by my app sales.

• Performance tests of VSANS: what is the attitude of your cluster under actual stress?

  Our config node VSAN

  Reference Dell R730xd

  768 GB OF RAM

  PERC730

  ability level: 21 x SAS disks 1, 2 TB

  the caching level: 3 x SANDISK SX350-3200

  dedicated NIC for VSAN 10GE

  We encounter problems while driving a large number of virtual machines on our cluster which themselves generate a large number of the IOPS / s (similar to IOmeter).

  We are faced with questions:

  -guests are cranked out vcenter

  -vmx files have been corrupted

  This does not mean that if we only use one virtual machine host to generate the load. In this case, these are our observations:

  % Of reading

  Write %

  The KB block size

  Oustanding IO

  GB of file size

  # Workers

  % Randomly

  Sequential %

  FTT

  # Components

  read a book

  IOPS / total s

  Totl Mbps

  AVG ms Lat

  45

  55

  4

  5

  10

  4

  95

  5

  1

  6

  0

  8.092

  33,15

  0.6

  45

  55

  4

  5

  10

  4

  95

  5

  1

  12

  0

  10.821

  44,33

  0.46

  45

  55

  4

  5

  10

  4

  95

  5

  1

  6

  100

  12.611

  51.65

  0.39

  45

  55

  4

  5

  10

  4

  95

  5

  1

  12

  100

  11,374

  46,59

  0.43

  45

  55

  4

  64

  10

  4

  95

  5

  1

  12

  100

  29.746

  121,8

  2.15

  100

  0

  4

  64

  10

  4

  100

  0

  1

  12

  0

  50.576

  207,1

  1.26

  100

  0

  4

  64

  10

  4

  100

  0

  1

  12

  100

  50.571

  207,1

  1.26

  100

  0

  0.512

  64

  10

  4

  0

  100

  0

  1

  100

  67.330

  34,47

  3.8

  If these numbers seem very good, Don't they?

  From our point of view, it would be ok if latency increases when you increase the load with multiple virtual machines. But as already out doubled over our cluster becomes broken after increasing the number of virtual machines at some point.

  We are currently testing with a subset of four nodes VSAN with the above config. In this group, we were able to turn on 187 load generation machines before that three of the four hosts entered the State "is not responding.

  We wonder if anyone has also made large performance tests. If so, we would be very interested in comments you make. Maybe this helps us to find the fault of our construction.

  Kind regards

  Daniel

  With the help of VMware we discover that the problems we face are caused by virtual machines gen load... each vm is generating 2048 ios in circulation... so with 187 VM on the cluster, we unreal ios in circulation (382976... when I remember the graphic observation of our cluster it would reduce up to 13000 per host) which we will never see in real world scenarios. With this high traffic vsan 6.1 ios has problems and vmware is working on a solution... maybe with 6.2 and qos that is resolved?

  A few other changes:

  -a newer driver for our network cards intel x 710

  -new driver and firmware (beta version of dell) for our h730 perc controller

  and some advanced settings:

  esxcfg-advcfg - 100000/LSOM/diskIoTimeout s

  esxcfg-advcfg - s 4/LSOM/diskIoRetryFactor

  esxcfg-advcfg - s LSOM/2047/heapSize (with these parameters, we were able to create 3 starts - with 7 metal discs and 1 flash device - for each host)

• OSB: Performance tests

  Hi all

  I want to test our Service OSB for Performance. I already did the test in SOAPUI. But my test performance requirement is something like below

  Request and the response stream :

  The client sends requests to

  • OSB of level of consumption (this enrichs the message) and for the Orchestration level OSB
  • OSB level orchestration (Orchestration done) by contacting OSB data layer
  • Data layer OSB (it connects to the database of the provider)

  I would like to send a request from a performance tool that could give me the amount of time needed to each layer of OSB.

  Please help me!

  Thank you

  Provide a follow-up on each of the OSB services involved in the flow. You can turn on tracing to the level of service, level of pipeline or action. Then run your SOAP UI or Load Runner or jMeter performance test.

  After that, you can monitor the statistics for each of the services in the health section for the sbconsole of the dash service. Depending on the chosen level you will be able to see the number of applications, the average processing time, min and max processing time for each service/operation/pipeline/action etc.

• Performance tests: bind variables

  When you write a SQL for the application, I want to do some performance testing of SQL before providing to JAVA developers. I understand that I need to test using bind variables, can someone guide me how do? What are the best tools out there to achieve? Please provide some guidance. Thank you!

  Rinne says:
  I read more about bind variable and I can test the use of bind variables. I understand that testing SQL using bind variables is a closer representation of the real world. Even when queries have large tables, the performance would be similar if I run the query using literals twice (to avoid hard analysis) compared to tests with bind variables? I am trying to understand more thoroughly the need for tests with bind variables. Why we take more time than the other? Thank you!

  The main thing is that the opimizer will / can do if bind variables different optimization techniques are used or not.
  There are two contradictory effects its regarding the binding settings.

  Effect 1: Reuse of cursor
  If the same is done again and again and again. Maybe different sessions. Then using binding settings is essential. Why? Because the same cursor can be reused, which saves a lot of time for analysis. This occurs mainly in OLTP systems. The idea behind this is that to do the same action, just for a different ID (ID in order for example) will result in an identical implementation plan.

  The result: Faster analysis time and less consumption of memory, because the same cursor can be resused between different sessions.

  Effect 2: Correct assumptions

  According to a filter expression, some using the value of the OBC will make an assumption based on statistical data the number of rows is returned because of this expression and the value.
  Speculation between a literal value and a bound value may be different. In many cases exist technical opimization (bind peeking etc.) to the same literal conjecture binded proposal.

  But there are exceptions, for example a condition such as the following will result in different estimates

  column between 10 and 20
  

  column between :P1 and :P2
  

  There are as well other effects.

  Result: The CBO can make assumptions better if literals. But most of the cases the proposal is identical.

  Conclusion: Literal values are useful if you do large queries where the output size depends strongly on the parameters provided, and where you run that very few of these (OLAP) queries.
  Binding settings are usfull when the same execution (OLTP) need a grand plan number of queries.

• CONSIDERATIONS OF MWA PERFORMANCE TEST

  Hi all
  
  We want to perform tests on our MSCA Fwk solutions especially manifest picking performance. Majority of orders shipped from our warehouse are orders of line 1.
  
  We must ensure that the system performs well enough for the company to continue operations post go-live.
  
  Can you please share your experiences on the data to be entered? How many orders to execute during the test to get a clear picture of performance.
  
  Are there specific aspects to be taken into account?
  
  Kind regards
  Arun.

  I think you need to do 2 types of performance tests:

  1. load tests
  Know what kind of charges you expect to see on the system.
  a. number of users
  (b) the number of transactions
  c. parallel transactions in EBS
  Set the system to reproduce that this charge and you should be able to pass with an average number of trnasactions running activity.

  2. stand-alone speed trials
  To do this you must make sure that the system is more fast/fast.
  Find a way to the device a technique to measure the amount of the difference.
  For example in our warehouse, we did a test based on the following points:
  1. check the time taken to enter data into the MSCA vs Legacy system is based on the number of iterations of scan/capture and not a quantity of function fo
  for example 96/6 pack are analysable. If you have a quantity of 1000 > it becomes a palette
  Given the conditions above a quantity of 96 would be a single iteration of data entry in picking manifest (items C.-a-d./quantite/lot)
  If we have a quantity of 15 it would be 3 iterations (6 + 6 + 3)
  2. find the distribution of the data in the warehouse.
  To make this excerpt, order lines all delivered over a given period
  Calculate the number of iterations you do. (handle in excel)
  Build your distribution boards
  Once you do this measure the time in Oracle vs system existing for each range
  Qty per range * delta time would give you more time by range
  Summation of all beaches gives you the total time.

  It is a very concise explanation. Please let me know if you need additional information

• Get transcript of discussion on the WebServices API CCA?

  Hello
  
  When you use the WebServices API against the ACC (Contact Center Anywhere) it means this method:
  IInteractions.getHistory (String sessionId, String sInteractionId)
  where a kind of event history can be retrieved.
  
  But how to find messages of real discussion for this interaction?
  
  Or they are only sent to the FTP server?
  
  Thank you
  Lucas

  Try:

  Interactions.WSDL

  getMediaFile

• Performance test stops himself in ALM

  When launching a performance in ALM 11.0 test, sometimes it stops. I lose a lot of testing because of this error.  I list the error logs it, to fix this error any help is appreciated.

  (1) has failed to collect statistics of controller, internal error: ' recovery of the class factory COM for component with CLSID {E933439A-81A1-11D4-8EEE-0050DA6171E8} failed due to the following error: 800706bf. »
  (2) has failed to collect statistics of controller, internal error: "Unable to get the controller Report Manager."
  (3) does not have to collect statistics of controller, internal error: "Unable to get the controller Report Manager."
  (4) run 192 (time range 2003) changed the State of execution to stop.
  (5) could not stop the test. Reason: "there is no end point for listening to net .pipe://localhost/cntrlservice/service that could accept the message." This is often caused by a wrong address or SOAP action. See InnerException, if any, for more details. The endpoint tube "net .pipe://localhost/cntrlservice/service" is not found on your local computer. '

  Hello

  Try disabling the J2EE/.net diag :-) on the diagnosis tab

  Chilglord

• multicast performance test?

  I'm curious to know what kind of bandwidth, you get performance multicast vSAN health plugin test. Now our vSAN is on a link of 1 G (will modernize it to 10G thereafter), I get only about 80 M/s compared to the desired bandwidth 125 M/s, I was wondering what could be done to improve it. It is a facility newly vSAN and no other traffic at all the.

  We use Dell N4032 switch, the current configuration of the network's MTU 9000, with active igmp snooping and quierer address configured as the IP of the interface VLAN switch, seems she works as assumed:

  show ip igmp snooping groups

  Group VLAN journalist IIR filter address Source

  ---- ------------------ ----------------- ------- --------- ---------------

  95 224.1.2.3 192.168.51.11 exclude Te1/0/2

  95 224.2.3.4 192.168.51.11 exclude Te1/0/2

  95 239.255.255.253 192.168.51.11 exclude Te1/0/2

  95 224.2.3.4 192.168.51.12 exclude Te1/0/4

  95 239.255.255.253 192.168.51.12 exclude Te1/0/4

  95 224.1.2.3 192.168.51.13 exclude Te1/0/6

  95 224.2.3.4 192.168.51.13 exclude Te1/0/6

  95 239.255.255.253 192.168.51.13 exclude Te1/0/6

  95 224.2.3.4 192.168.51.14 exclude Te1/0/8

  95 239.255.255.253 192.168.51.14 exclude Te1/0/8

  I also tried to disable igmp monitoring on this vlan, makes no difference on the performance of multicat test.

  It's true. In fact, we put the limitation/performance target of network multicast as 1000 M/bits during the test, the desired line speed is 1000 * 1024 * 2/8 = 125 M/B. As long as bandwidth real is greater than 50 M/B, we consider the NECK.

• Bad API Performance

  Our vCenter is virtual running and we cannot see the performance bottlenecks.

  The vCenter (4.1.0 U1) have round about 500 ESX a VMs of 1600.

  The following PS Script takes 10 Minutes to compete:

  $ESXHosts = get-VMHost | %  {
  $esxName = $_. Name
  $clusterName = $_. Parent
  $_ | Get-VirtualPortGroup | Select @{N = "PGName"; E={$_. Name}}, @{N = "ESXName"; E = {$esxName}}, @{N = 'Cluster'; E = {$clusterName}}
  } | Tri-objet-PGName, ESXName, Cluster property | Where-Object {$_.} PGName - eq $VMNetwork} | Select the Cluster - single

  Should it?

  Is it possible to measure the performance of the API?

  Ralf

  Try it like this.

  Only, the script uses the cmdlet Get-View and limits the number of properties returned.

  $VMNetwork = "PgName"
  $clusterTab = @{}
  foreach($cluster in Get-View -ViewType ClusterComputeResource -Property "Name","Host"){
      $cluster.Host | %{
          $clusterTab[$_] = $cluster.Name
      }
  }
  
  Get-View -ViewType HostSystem -Property "Name","Config.Network.Portgroup" | % {
      $esxName = $_.Name
      $clusterName = $clusterTab[$_.MoRef]
      $_.Config.Network.PortGroup | `    Where-Object {$_.Spec.Name -eq $VMNetwork} | `    Select @{N="PGName";E={$_.Spec.Name}},
              @{N="ESXName";E={$esxName}},
              @{N="Cluster";E={$clusterName}}
  } | Sort-Object -Property PGName, ESXName, Cluster | Select Cluster -Unique
  

• Retrieve the attributes of table of database source Java webservice API

  Hello
  
  I have a source of data, with all the columns of mandatoru and the additional columns. I can search these columns, and they are listed in the source database "attribute Mapping" tab.
  
  When I try to get these columns/attributes of Web services Java API ResultElement, I don't have access to them, apparently. I try with the getCustumAttributes(), but it is empty. I also tried mapping of these attributes to something else, but the "Mapping of attributes" tab always reset my selections.
  
  How to read the values of these columns in the result of my search?
  
  Thank you
  Søren

  Hi Soren,

  When you use the Java API, you must indicate ITS what personalized search attributes you want to return. This is done by an fetchAttribute array [integer] ID's discover the Java API in OracleSearchService.doOracleSearch.

  Once you add your list to your appeal request, ITS them will return in the resulting XML. I think that the reason that its does not automatically return all custom attributes is to improve performance. Need to return the query more than you need.

  I hope this helps.

  Best regards

  -Stephen

• Performance test

  Hello
  
  I want to Test Load, Performance and Stress testing for server and application also. Is there any tool for that specific test. Please suggest me.
  
  Thanks in advance.

  Hello

  I use the Oracle Application Testing Suite version 8

• Simple API call test in Visual Studio 2010 C++ can not find jvm.dll

  Hello!
  
  I started experimenting with the start-up of a Java program in C++ of the Interior program, wrote my code in Visual Studio 2010.
  
  I use the latest code, that I could find:
  
  < code >
  #include < jni.h >
  
  (...)
  
  / * indicates a virtual Java machine * /.
  Machine Java virtual * jvm;
  
  / * pointer to the method native interface * /.
  JNIEnv * env;
  
  / * Initialization JDK/JRE 6 VM arguments * /.
  JavaVMInitArgs vm_args;
  
  JavaVMOption options = new JavaVMOption [1];
  
  ".optionString options [0] = «-Djava.class.path=/usr/lib/java;
  
  vm_args.version = JNI_VERSION_1_6;
  vm_args.nOptions = 1;
  vm_args.options = options;
  vm_args.ignoreUnrecognized = false;
  
  / * load and initialize a virtual Java machine, return a JNI interface pointer in env * /.
  JNI_CreateJavaVM (& jvm, (void *) & env, & vm_args);
  
  remove options;
  
  / * call the method Main.test using the JNI * /.
  JClass cls = env-> FindClass ("Main");
  jmethodID mid = env-> GetStaticMethodID (cls, 'test', '(I) V');
  env-> CallStaticVoidMethod (cls, mid, 100);
  
  / * We're done. */
  virtual machine Java-> DestroyJavaVM();
  < code >
  
  In visual studio, make sure that:
  * In the window of directories in VC ++, which includes the path 'directories Include:
  C:\Program Files\Java\jdk1.6.0_24\include\win32
  C:\Program Files\Java\jdk1.6.0_24\include
  
  * Only the path of "Library directories" includes:
  C:\Program Files\Java\jdk1.6.0_24\lib
  
  * In the window of the linker to entry the path "Additional Dependencies" includes:
  C:\Program Files\Java\jdk1.6.0_24\lib\jvm.lib
  
  When you try to run the compiled executable, I get the following message:
  
  "The program can't start because jvm.dll is missing on your computer. Try reinstalling the program to fix this problem. »
  
  If I copy the jvm.dll in the same path as my executable, this does not happen, but I guess that this is not the right way to get there!
  
  I tried to add the path "C:\Program Files\Java\jdk1.6.0_24\jre\bin\client" for the Win 7 path system, as well as in the path of directories executables directories of VC ++, but it does not work.
  
  What would be the right way to ensure that my executable is jvm.dll?
  
  Thank you!
  
  Edited by: 841148 March 2, 2011 09:27

  I tried to add the path "C:\Program Files\Java\jdk1.6.0_24\jre\bin\client" for the Win 7 path system, as well as in the path of directories executables directories of VC ++, but it does not work.

  Myself I have not found much success with the env vars update unless I reboot (although log out then in could do.)

• Oracle Database 11 g: performance test 1Z0-054

  Hello
  
  I want to take the Oracle Database 11g certification: optimizing performance exam 1Z0-054 and you want to take the exam.
  To get the credentials of ECO, I know that we need to follow a training from Oracle University. I'm not an OCP.
  
  Can I take the exam now and later take the course to meet the certification requirements? I know that this is not the right way, but I can't pay $3000 for the course right now. I can take the exam through self-study. I want to check if I can take the exam now and later to take the course.
  
  Is it mandatory to follow the courses before the exam?
  
  Thank you
  Naveen.

  Naveen Kumar C wrote:
  Hello
  There
  I want to take the Oracle Database 11g certification: optimizing performance exam 1Z0-054 and you want to take the exam.
  To get the credentials of ECO, I know that we need to follow a training from Oracle University. I'm not an OCP.

  Can I take the exam now and later take the course to meet the certification requirements? I know that this is not the right way, but I can't pay $3000 for the course right now. I can take the exam through self-study. I want to check if I can take the exam now and later to take the course.

  Is it mandatory to follow the courses before the exam?

  Thank you
  Naveen.

  In fact, you can take the exam now and eventually win the 11g PERFTUNE ECO credentials when you either:
  (1) complete, submit and get verified UO allowed 11 courses of perftune g (possible, but seems a little plow in front).
  or
  (2) to become OCP DBA 11 g.