The Cool Fox

Why out-of-memory error is thrown? Permanent Generation: The Permanent Generation is where class files are kept. These are the result of compiled classes and JSP pages. If this space is full, it triggers a Full Garbage Collection. If the Full Garbage Collection cannot clean out old unreferenced classes and there is no room left to expand the Permanent Space, an Out‐of‐ Memory error (OOME) is thrown and the JVM will crash. There are three basic JVM command switches that control the amount of memory in the Java heap. -XX:Xms -XX:Xmx -XX:MaxPermSize -XX:Xms used to set memory available to JVM initially. -XX:Xms used to set maximum amount of memory into which the JVM can grow . -XX:MaxPermSize are used to set size for Permanent Generation. Fixing out-of-memory error Find the location of Oracle Middleware Home. Click here to see Navigate to the location: <Oracle_Middleware_Home_Location> \ jdev\bin and open the file jdev.conf Add the be

Clearing Oracle JDeveloper temp and cache directory with hotkeys

Oracle JDeveloper keeps on creating temp, cache and history files. So as a best practice to boost up your JDeveloper performance keep deleting the files frequently. Every time you can't go these directories to manually delete the files, so you can assign hotkeys to perform this delete operation. Follow the below steps to setup hotkeys: Goto run command and type prefetch and hit the OK button Copy the location of this directory, like in our case the below location Goto run command and type prefetch and hit the OK button Copy the location of this directory, like in our case the below location Goto Help -> About -> Properties Tab and search for ide.system.dir this is system directory In the system directory, there are two directories which need to be cleaned: .diagnostics and .history Now create the following batch file (.bat) with above-copied directories. Make sure you are using correct system directory

Change the priority of Oracle JDeveloper to improve performance

You can change the priority of Oracle JDeveloper to improve performance. To change performance follow these steps: Open the task manager. Click on Processes Tab Now right click the JDeveloper process and set the priority to either Realtime or High

[VBCS] Creating Oracle Visual Builder Cloud Service (VBCS) instance?

Oracle Visual Builder Cloud Service (VBCS) is a cloud-based development platform that allows developers to rapidly create and deploy web and mobile applications with a low-code approach. Use Cases: Custom Application Development - For organizations looking to develop tailored applications quickly without extensive coding. Extension of Oracle SaaS Applications - Enhancing and extending the capabilities of existing Oracle SaaS applications like Oracle Fusion Applications. Rapid Prototyping - Quickly building and iterating on application prototypes to validate ideas and gather feedback. To start working with VBCS, we need an instance. There are two ways we can provision VBCS instance, by: Enabling VBCS for an OIC instance Creating standalone VBCS instance Enabling VBCS for an OIC instance Login to the OCI console and navigate to already created OIC instance. Follow this link to know how to create OIC instance. Below is the instance that we have already created In the resour

Changing preference to open pages in Source View instead of Design View in Oracle jDeveloper

Whenever we open files like JSP Page Fragments, JSP Pages, HTML code, etc. they always open in Design view instead of source code which makes large files or files with many components to load slower. So, do we have any way which enables Jdeveloper to open files directly in Source Code view instead of opening the Design editor? Yes, we can change this default setting. To change this setting follow these steps: Go to Tools Menu, then click Preferences Preferences dialog will appear. In files Files Types section, switch to Default Editors Tab. Select the file type for which you want to change the default editor and then change the editor from Default Editor drop down at the bottom. For example, here we have changed the default editor of JSP Source file type to Source. So from now whenever you open any file of type JSP Source, JDeveloper will open its source code instead of design view.

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