Hi, Finally I managed to build wine (1.1.20) on Centos 5.2 x86_64 and applied patch 20483 (0001-Ported-mmap-patch-to-wine-1.1.19.patch) of bug 13335. But unfortunatelly I get the same performance: each .exe process get 3.6 GB of Virtual memory. Any other suggestion? Thanks, Salva