function::proc_mem_data — Program data size (data + stack) in pages
1) proc_mem_data:long()
2) proc_mem_data:long(pid:long)
1) Returns the current process data size (data + stack) in pages, or zero when there is no current process or the number of pages couldn't be retrieved.
2) Returns the given process data size (data + stack) in pages, or zero when the process doesn't exist or the number of pages couldn't be retrieved.