Various systems and methods can decide whether information being evicted from a level one (L1) operating system cache should be moved to a level two (L2) operating system cache. The L2 operating system cache can be implemented using a memory technology in which read performance differs from write performance. One method involves detecting that a portion of a file (e.g., a page) is being evicted from a L1 operating system cache. In response to detecting the imminent eviction of the portion of the file, the method determines whether the portion of the file has been read more frequently or written more frequently. Based upon this determination (e.g., in response to determining that the portion of the file has been read more frequently, if the L2 cache provides better read than write performance), the method decides to copy the portion of the file to the L2 operating system cache.