On 02.07.2014, Rick Stevens wrote: > I don't know of a way to control either the size of the cache or its > retention period. It might be controllable via a sysctl, but I've never > tried to bugger things like that. Look at parameters which can control the kernels virtual memory management, e.g.: vm.dirty_background_ratio vm.dirty_background_bytes vm.dirty_ratio vm.dirty_bytes vm.dirty_writeback_centisecs vm.dirty_expire_centisecs If you can reproduce the "slow" disk behaviour by dropping the caches, maybe you'll gain some advantage by tweaking some of those. echo 3 > /proc/sys/vm/drop_caches I for myself have been using vm.swappiness = 10 vm.dirty_ratio = 10 vm.dirty_background_ratio = 5 for a long time, avoiding long stalls when writing dirty pages to disk. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
