Path: csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!border3.nntp.dca.giganews.com!backlog3.nntp.dca3.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.posted.gcicommunications!news.posted.gcicommunications.POSTED!not-for-mail NNTP-Posting-Date: Sat, 28 Jun 2014 20:11:08 -0500 Newsgroups: alt.comp.periphs.hdd,comp.sys.ibm.pc.hardware.storage,comp.sys.mac.hardware.storage,comp.os.linux.hardware,comp.os.linux.setup Subject: Re: Is it true that it is a bad idea to put a swap/pagefile on a SSD? References: <280620141511008709%nospam@nospam.invalid> <874mz496r6.fld@barrow.com> <280620141555147959%nospam@nospam.invalid> <87vbrk7nsm.fld@barrow.com> <280620141802446932%nospam@nospam.invalid> From: floyd@apaflo.com (Floyd L. Davidson) Organization: __________ Date: Sat, 28 Jun 2014 17:11:02 -0800 Message-ID: <87fvio7c61.fld@barrow.com> User-Agent: gnus 5.10.6/XEmacs 21.4.15/Linux 2.6.19 Cancel-Lock: sha1:nrTAJVM8W5MNg1HjiXiDcAV+yGU= MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Lines: 81 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 24.237.125.254 X-Trace: sv3-Gt0ry77IEjLX6Ej2ral3sla/ci7PzCQU95jE4dTiNopmQfeyXrgmZUFm0wHDo04aset25+zjhB97VcO!xcA/VBov+1n0w9kZrgNJoJbNxSmNaW2YUtm/Xas3/UjOpUueNQ7fqv7EKTdZNEN1TP/noW// X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 4255 Xref: csiph.com comp.sys.ibm.pc.hardware.storage:5558 comp.sys.mac.hardware.storage:450 comp.os.linux.hardware:2466 comp.os.linux.setup:3635 nospam wrote: >In article <87vbrk7nsm.fld@barrow.com>, Floyd L. Davidson > wrote: > >> >> >> Because that wears out the SSD quickly, and it is better to put it on a >> >> >> slow HDD. If so, then how do computer (especially laptop/notebook) users >> >> >> with only a SSD (not hybrids with HDDs) do this? I assume Windows, Mac >> >> >> OS X, and Linux follow this rule? >> >> > >> >> >ssd doesn't wear out that quickly and you'll probably replace the >> >> >computer before the ssd wears out, even with swap on it. >> >> >> >> "Even" with swap? Swapping is something that should be >> >> relatively rare. >> > >> >nonsense. swapping happens as a matter of course on any desktop/laptop >> >system because physical memory is always limited. >> >> Only with a poorly designed system. > >nonsense. More of *your* endless nonsense on a topic you know little about. >> The only time swap is written to on any of my systems is >> shortly after a reboot, as essentially unused memory is >> swapped out to provide more space in RAM. > >then your system is not a typical system. > >> >> It's there to prevent a major disaster >> >> on the odd occasion when there isn't enough memory. >> > >> >odd occasion?? there is never enough physical memory unless you don't >> >do much of anything with the computer. >> >> There are lots of systems that have enough RAM installed >> to simply not need any installed swap space. > >and there are lots that aren't. so what? You said it "never" happens. Clearly it happens very often! >nearly every computer in use today could benefit from more memory but >there's diminishing returns by adding more. The diminishing return is not the amount of RAM used for program execution though. Which is to say, swap space commonly has nothing to do with how much RAM is provisioned, nor the other way around. >> That RAM >> is typically used as buffering for disk reads, so the >> more there is the faster the system appears to be. > >memory can be used for a lot of things, not just disk caching. So? >> But >> one effect is that there is virtually always enough RAM >> for program execution (generally with many GB more >> available at any given moment). > >nonsense. > >*one* app might fit into physical memory, but *all* apps won't fit and >switching between them *will* hit swap. > >and 'virtually always enough' are weasel words. I've got a box here that typically shows a load average well into double digits when I'm editing images. It has never swapped out a running program. [remaining garbage snipped] -- Floyd L. Davidson http://www.apaflo.com/ Ukpeagvik (Barrow, Alaska) floyd@apaflo.com