On Tue, 2011-06-07 at 23:40 +0200, Ole Tange wrote: > If you use GNU Parallel for running memory hungry programs, you will > probably appreciate --noswap: > > parallel --noswap your_memory_hungry_program ::: a b c > > This will run your_memory_hungry_program unless your system is > swapping both in and out - which is usually an indication that your > system is out of physical memory. It will test every 10 seconds and > try again then. > > If you use GNU niceload for running memory hungry programs, you will > probably appreciate --noswap, --mem, and --hard: > > niceload --hard --load 2 your_cpu_hungry_program > > niceload will normally slow down a program, but with --hard it will > suspend the program until the limit is reached (e.g. the load is below > the given limit). The program will be started but only run for very > few milliseconds before being suspended. > > --mem makes is possible to only run a program if there is this amount > of memory free: > > niceload --hard --mem 2g this_program_requires_2g_ram_to_run > > --noswap works similar to --noswap in GNU Parallel: if the machine is > swapping slow down or do not run the program. > > niceload --hard --noswap dont_run_this_program_if_swapping
Woah, very useful. Thanks! > > Let me know if you find bugs in these. > > /Ole > -- Ethan Baldridge Senior Systems Engineer Superior Document Services
