> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Nico Williams > > As for swap... really, you don't want to swap. If you're swapping you > have problems.
For clarification, the above is true in Solaris and derivatives, but it's not universally true for all OSes. I'll cite linux as the example, because I know it. If you provide swap to a linux kernel, it considers this a degree of freedom when choosing to evict data from the cache, versus swapping out idle processes (or zombie processes.) As long as you swap out idle process memory that is colder than some cache memory, swap actually improves performance. But of course, if you have any active process starved of ram and consequently thrashing swap actively, of course, you're right. It's bad bad bad to use swap that way. In solaris, I've never seen it swap out idle processes; I've only seen it use swap for the bad bad bad situation. I assume that's all it can do with swap. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
