Warn User if JVM doesn't allocate enough memory for JOSM

[anonymous]

1. Can the menu items in Presets be listed alphabetically

2. Not easy to find out how to remove info boxes from left hand side e.g conflicts,command stack - still haven't found out!

3. out of memeory message - not easy to find out how to reset XmXX - resolved this but it took a lot of searching

[xeen]

1. Dup of #1839
2. It's not possible yet, dup of #1938
3. It may be worth investigating if it's possible to display a warning beforehand to make it more obvious. The maximum available memory can be checked using

Runtime.getRuntime().maxMemory()/1024/1024

what's a reasonable limit for this?

[GeoJ <geoj@…>]

You can register custom notification limits regarding the memory allocation.

Example for a notification if memory usage reaches 90%:

MemoryMXBean mbean = ManagementFactory.getMemoryMXBean();
NotificationBroadcaster emitter = (NotificationBroadcaster) mbean;
emitter.addNotificationListener(this, null, null); // this must implement NotificationListener
for (MemoryPoolMXBean memPool : ManagementFactory.getMemoryPoolMXBeans()) {
  if (memPool.isUsageThresholdSupported()) {
    MemoryUsage memUsage = memPool.getUsage();
    memPool.setUsageThreshold((long) (memUsage.getMax() * 0.9));
  }
}
public void handleNotification(Notification notification, Object handback) {
  if (!MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED.equals(type)) return;
  [notification code]

[stoecker]

Ticket #3965 has been marked as a duplicate of this ticket.