Dynamic memory expansion by data compression

Dynamic memory expansion based on data compression is described. Data represented in at least one page to be written to a main memory of a computing device is received. The data is compressed in the at least one page to generate at least one compressed physical page and a metadata entry corresponding to each page of the at least one compressed physical page. The metadata entry is cached in a metadata cache including metadata entries and pointers to the uncompressed region of the at least one compressed physical page.