Every instance of the program will have its own private copy of the uncompressed data. For normal uncompressed binaries the pages of the on-disk binary would be

Every instance of the program will have its own private copy of the uncompressed data. For normal uncompressed binaries the pages of the on-disk binary would be shared instead. (Except for any pages that get modified, which would trigger copy-on-write. A classic example would be load-time dynamic linker relocations).