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For example, a swap file can be placed on any mounted file system, can be set to any desired size, and can be added or changed as needed. Swap partitions are not as flexible; they cannot be enlarged without using partitioning or volume management tools, which introduce various complexities and potential downtimes.
In computing, resident set size (RSS) is the portion of memory (measured in kilobytes) occupied by a process that is held in main memory . The rest of the occupied memory exists in the swap space or file system , either because some parts of the occupied memory were paged out , or because some parts of the executable were never loaded.
The two most common uses for zram are for the storage of temporary files (/tmp) and as a swap device. Initially, zram had only the latter function, hence the original name "compcache" ("compressed cache"). Unlike swap, zram only uses 0.1% of the maximum size of the disk when not in use. [1]
At its core is a fixed-size table with the number of rows equal to the number of frames in memory. If there are 4,000 frames, the inverted page table has 4,000 rows. For each row there is an entry for the virtual page number (VPN), the physical page number (not the physical address), some other data and a means for creating a collision chain ...
The partition type code for a primary partition can either correspond to a file system contained within (e.g., 0x07 means either an NTFS or an OS/2 HPFS file system) or indicate that the partition has a special use (e.g., code 0x82 usually indicates a Linux swap partition).
When the configured maximum pool size is reached as the result of performed swapping, or when growing the pool is impossible due to an out-of-memory condition, swapped pages are evicted from the memory pool to a swap device on the least recently used (LRU) basis. This approach makes zswap a true swap cache, as the oldest cached pages are ...
Max file size: 16 EiB [3] [a] Max no. of files: 2 64 [b] [4] ... Ability to handle swap files and swap partitions; Implemented but not recommended for production use
The historical use of swap as referring to entire processes is still alive; MVS has both paging and swapping. Current versions of MVS no longer have dedicated swap files, but they still use swapping as a mechanism for regulating the size of the working set. I can provide references for both points if that would not be TMI.