1. A method, comprising: obtaining an attribute of a stack trace of a software program; using the attribute to select, by a computer system, an address-translation instance from a set of address-translation instances for processing the stack trace; and providing the stack trace to the selected address-translation instance for use in translating a set of memory addresses in the stack trace into a set of symbols of instructions stored at the memory addresses, wherein translating the set of memory addresses comprises processing, by the selected address-translation instance, the stack trace by: obtaining one or more symbol files, each symbol file comprising a set of mappings of the memory addresses in the software program to the symbols of the instructions stored at the memory addresses; using the sets of mappings from the one or more symbol files to replace the memory addresses in the stack trace with the symbols; and caching, in a memory associated with the selected address-translation instance, for at least one of the memory addresses that was replaced, a mapping of the memory address to a symbol of a corresponding instruction, the caching comprising associating the memory address and stack trace information with the symbol stored in the cached mapping; and using the cached mapping to replace the memory address with the symbol in a subsequent stack trace of the software program.