Logic Exception

Originally posted on medium on Jan 16th, 2023. Systems Engineering NASA defines Systems Engineering as follows : At NASA, “systems engineering” is defined as a methodical, multi-disciplinary approach for the design, realization, technical management, operations, and retirement of a system. A “system” is the combination of elements that function together to produce the capability required to meet a need. The elements include all hardware, software, equipment, facilities, personnel, processes, and procedures needed for this purpose; that is, all things required to produce system-level results. The results include system-level qualities, properties, characteristics, functions, behavior, and performance. The value added by the system as a whole, beyond that contributed independently by the parts, is primarily created by the relationship among the parts; that is, how they are interconnected. It is a way of looking at the “big picture” when making technical decisions. It is a way of achievi...

Last week, after I upgraded to the Netbeans 7.0 Beta, scanning issues, coupled with spontaneous freezes, cropped up again. I initially thought I was running into the same heap size issue as described in one of my earlier posts. After some research, it turns out the issue was related to garbage collection this time. http://performance.netbeans.org/howto/jvmswitches/index.html http://wiki.netbeans.org/FaqScanningAndIndexingPerformanceHints#Use_different_Garbage_Collector_strategy We've had several reports from users that choosing 'Concurrent Mark And Sweep' garbage collector improves scanning performance. This may or may not make a difference on your system. The problem is that people use different hardware, different versions of JDK and they have different default GC algorithm chosen by their JVM. I added the required flags to my netbeans.conf file and performance improved to a point where it is now much better than it was previously. netbeans_default_options="...

I was having problems with Netbeans 6.9 where it would just hang trying to scan my codebase which consists of around ~200.000 PHP files. Another issue was related to code completion and suggestions which caused the IDE to become unresponsive or, in some cases, hang. It looks like the issue is related to the heap size which is automatically set since version 6.0. Since NetBeans version 6.0, the default limit for heap size (-J-Xmx) is determined automatically, with respect to the amount of memory available on the system. There is no -J-Xmx option specified in netbeans.conf. However, if you specify the heap size limit (i.e. you add the -J-Xmx... option to netbeans.conf), then the limit given by you will be respected. http://wiki.netbeans.org/FaqSettingHeapSize So I ended up increasing the heap size in netbeans.conf by adding the "-J-Xmx2048m" option. Here are my current settings: netbeans_default_options="-J-client -J-Xss2m -J-Xms32m -J-Xmx2048m -J-XX:PermSize=32m...