On Mon, Jan 20, 2014 at 12:29:28PM +0000, Kevin Chadwick wrote: > previously on this list Roger Leigh contributed: > > > With an SSD, you really > > don't want /tmp or swap on it; > > Why?, due to limited write cycles?
That's one reason, but the one I was thinking of was the shocking performance. I accidentally disabled tmpfs on /tmp on my main system with an SSD rootfs a few months back and was wondering why I was experiencing such slow builds, desktop freezing for seconds at a time, and other intermittent stalls. Turns out it was thrashing the SSD since /tmp was on the rootfs. Enabling tmpfs on /tmp resolved the problems, changing the performance from dire to excellent. (I have the swap on a RAID1 LVM LV on fast HDDs). This is a system with 8 cores @4GHz, 16GiB RAM, over 16GiB swap, so should be pretty performant, yet /tmp on an SSD made it crawl and freeze continually. This is purely down to the slow write speed of the SSD I have (Intel 320 128GB). If you have a faster SSD, maybe it won't be an issue, but given the amount of junk being written to /tmp when running a desktop environment and applications, from dozens of tmp files and sockets to streaming video, it's likely it will make a significant difference to make /tmp a tmpfs or HDD filesystem. Regards, Roger -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' schroot and sbuild http://alioth.debian.org/projects/buildd-tools `- GPG Public Key F33D 281D 470A B443 6756 147C 07B3 C8BC 4083 E800 -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20140120143024.gc6...@codelibre.net
