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This statements won’t appear in the statistics of long-running statements on database side, but anyway can cause a performance issue when getting called in loop. Imagine some very short running sql-statements as an example. Also there are specialized views directly visualizing the hotspots. So it is possible to find the hotspots in execution, an important basic functionality for profiling your application. Helpful in finding memory leaks is the facility to view the GC-path based on any class.Īpart from memory profiling, with all profiling tools the developer can analyse method calls and the cpu-time needed to perform the operations. The heap viewer comes with the ability to shows references, computing retained sizes and paths to GC roots. In general VisualVM, shipped with the Java SDK, is enough to create such a report. To find memory leaks, a good starting point is to compare two memory snapshots to find the difference after garbage collection is done.
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In case of common memory issues, all tools provide good and similar solutions. Many performance problems in enterprise or web applications result from memory (garbage collector) or database access issues. Specifically, we are going to make use of the JProfiler which can be invoked from within the IDE without any further need for session configuration. Figure 4.2, “Installation Program Widgets as seen in Disk Druid”, shows the cursor on the Edit button.The purpose of this article is to demonstrate a profiler example in IntelliJ Idea IDE. In Figure 4.1, “Installation Program Widgets as seen in Boot Loader Configuration”, the cursor is positioned on the OK button. As the cursor is moved from widget to widget, it may cause the widget to change color, or the cursor itself may only appear positioned in or next to the widget. Buttons can be selected when they are highlighted.Ĭursor - Although not a widget, the cursor is used to select (and interact with) a particular widget.
#JPROFILER GUIMODE OFFLINE MODE WINDOWS#
You progress through the windows of the installation program by navigating these buttons, using the Tab and Enter keys. The scroll bar makes it easy to move to any part of a file.īutton Widget - Button widgets are the primary method of interacting with the installation program. Scroll Bar - Scroll bars appear on the side or bottom of a window to control which part of a list or document is currently in the window's frame. Your current position is shown on the scroll bar by a # character, which moves up and down the scroll bar as you scroll. If a text widget contains more information than can be displayed in the space reserved for it, a scroll bar appears if you position the cursor within the text widget, you can then use the Up and Down arrow keys to scroll through all the information available. At times, text widgets may also contain other widgets, such as checkboxes. Text Widget - Text widgets are regions of the screen for the display of text. When the cursor rests on a text input line, you may enter and/or edit information on that line. Text Input - Text input lines are regions where you can enter information required by the installation program. When the cursor is within a checkbox, press Space to select or deselect a feature. The box displays either an asterisk (selected) or a space (unselected). When you are finished in that window, it disappears, allowing you to continue working in the window underneath.Ĭheckbox - Checkboxes allow you to select or deselect a feature. At times, one window may overlay another in these cases, you can only interact with the window on top. Window - Windows (usually referred to as dialogs in this manual) appear on your screen throughout the installation process.