32bit version of KDB at Windows wsfull at 1GB memory

HI, I try to load some data at 32bit version of KDB at Windows, however, I get wsfull when Q take 1GB memory, is that normal? I thought it process memory limit at Windows should be around 2GB?

https://groups.google.com/forum/#!topic/personal-kdbplus/oslH8FI0fO4

I see, thanks