README for XFree86 3.3.3 on OpenBSD : Running X
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6. Running X

8mb of memory is a recommended minimum for running X. The server, window manager and an xterm take about 4 Mb of memory themselves. On a 4Mb system that would leave nothing left over for other applications like gcc that expect a few meg free. X will work with 4Mb of memory, but in practice compilation while running X can take 5 or 10 times as long due to constant paging.

6.1. Starting xdm, the display manager

6.2. Running X without the display manager


README for XFree86 3.3.3 on OpenBSD : Running X
Previous: Configuring PEX and XIE extensions
Next: Starting xdm, the display manager