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126 APPENDIX B. TROUBLESHOOTING X-PLANE
• In 64-bit Windows (including most installations of Windows Vista and Windows 7): 4 GB
• In Mac OS X: 3.5 GB
• In Linux: 3 GB or so
When X-Plane reaches the address space limit of your system (listed above), it will crash.
You can confirm that this is occurring by using your system’s memory monitor and watching the
memory use of the X-Plane process.
To check memory usage on a Mac, do the following:
1. Click on the Applications folder in the task bar. In the menu that opens, click Utilities, then
click Activity Monitor.
2. Launch X-Plane as normal.
3. In the Process Name column of Activity Monitor, look for the X-Plane process.
4. Look at the Real Mem column corresponding to the X-Plane process. It should have a value
like 950 MB or 1.5 GB listed. If this value is beyond 3.5 GB, X-Plane is liable to crash.
To check memory usage in Windows, do the following:
1. Right-click on an empty area of the task bar and click Start Task Manager. In the window
that opens, click on the Processes tab.
2. Launch X-Plane as normal.
3. In the Image Name column of the Task Manager, look for the X-Plane process.
4. Look at the Memory column corresponding to the X-Plane process. It should have a value
like 950,000 K listed. If this value is beyond your operating system’s address limits (listed
above), X-Plane is liable to crash. Note that there are 1, 024 · 1, 024 = 1, 048, 576 kilobytes in
1 gigabyte, so the 2 GB memory limit in Windows XP would be represented as 2,097,152 K.
If this is indeed your problem, you can correct it by doing the following:
• Turn down rendering settings. The major ones are: airport detail (set to default), forests
(set to something moderate if you are using autogen too), and texture res (first run with
compressed textures). Don’t use 4x SSAA when in HDR mode—use FXAA instead.
• If you are on 32-bit Windows, consider moving to 64-bit Windows, at least in the long term.
• If you are on 32-bit Windows with 2 GB per process, increase that limit to 3 GB as described
on the X-Plane Wiki.
B.4 My Joystick or Yoke Isn’t Working
If the joystick and other flight controls appear to be configured correctly according to the steps
outlined in Chapter 4 but are not giving the desired response in the simulator, it’s time to troubleshoot.
Thankfully, X-Plane makes it easy to find out how the software is perceiving the flight
controls’ input.
In the following example we’ll assume that the plane’s pitch, yaw, and roll are not matching
the way the joystick is being moved. A similar procedure may be used for other malfunctioning
controls.
1. Move your mouse to the top of the screen and open the Settings menu.
2. Click Data Input & Output.