Re: My System doesn't use swap!
Hi Bill :) * Bill Davidsen <[EMAIL PROTECTED]> dixit: > >Swap is orders of magnitude slower than RAM. Why put things there if you > >still have RAM left? The kernel only puts things in swap when it has no > >more RAM _and_ has already deleted big chunks of its disk cache. > Unless he just booted, I would expect at least a little use of the swap, > something like this, on a machine with 1GB RAM and not much happening. I have 2.4.29 running and uptime is about 24 hours now, and with 1Gig of RAM and a loadavg in the last 15 minutes has been 4, more or less, and I have 130 megs of free memory and none of my 512 megs swap is used. And this is very common for me. The only way of using swap is starting X, mozilla (some pre-firefox version will do) and one of the many memory leaking apps available for the X Window System. On console, with the apps I run usually (that includes setiathome too, and heavy use of the C compiler) I don't hit swap. This is my memory status right now: total: used: free: shared: buffers: cached: Mem: 927006720 796491776 1305149440 5517312 738082816 Swap: 536862720 0 536862720 MemTotal: 905280 kB MemFree:127456 kB MemShared: 0 kB Buffers: 5388 kB Cached: 720784 kB SwapCached: 0 kB Active: 7096 kB Inactive: 719092 kB HighTotal: 0 kB HighFree:0 kB LowTotal: 905280 kB LowFree:127456 kB SwapTotal: 524280 kB SwapFree: 524280 kB Pretty low usage, and still more than 700MB of cached memory available to avoid using swap. Raúl Núñez de Arenas Coronado -- Linux Registered User 88736 http://www.dervishd.net & http://www.pleyades.net/ It's my PC and I'll cry if I want to... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
Kyle Moffett wrote: On Jan 31, 2005, at 07:44, Matthias-Christian Ott wrote: Ok maybe I wasn't able to read the /free/ output correctly, but why is no swap used (more than 60% ram are used)? Swap is orders of magnitude slower than RAM. Why put things there if you still have RAM left? The kernel only puts things in swap when it has no more RAM _and_ has already deleted big chunks of its disk cache. Unless he just booted, I would expect at least a little use of the swap, something like this, on a machine with 1GB RAM and not much happening. It's burning in with setiathome, and I played a few mp3s, and it seemed to feel the need for swap. I see similar on a box with 4GB, it never comes close to low memory, but still uses a few MB swap. pixels:davidsen> free total used free sharedbufferscached Mem: 1035228 996712 38516 0 17510067932 -/+ buffers/cache: 553680 481548 Swap: 2048248 112922036956 pixels:davidsen> uname -rn pixels.tmr.com 2.6.10-ac2 Not that this is a bad thing, but I'm surprised at no swap used at all. -- -bill davidsen ([EMAIL PROTECTED]) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
On Mon, 31 Jan 2005 22:50:35 +1100, Benno <[EMAIL PROTECTED]> wrote: > On Mon Jan 31, 2005 at 13:44:04 +0100, Matthias-Christian Ott wrote: > >Ok maybe I wasn't able to read the /free/ output correctly, but why is > >no swap used (more than 60% ram are used)? > > Why would you want to use swap when you still have free RAM? The kernel > isn't using swap because there is no need to. 2004 common VM thread: Why is my swap being used, I still have free RAM? 2005 common VM thread: Why is my swap not being used, I only have some free RAM? Guess Linux is getting something right -- we can't please anyone!!! -Rahul - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
On Jan 31, 2005, at 07:44, Matthias-Christian Ott wrote: Ok maybe I wasn't able to read the /free/ output correctly, but why is no swap used (more than 60% ram are used)? Swap is orders of magnitude slower than RAM. Why put things there if you still have RAM left? The kernel only puts things in swap when it has no more RAM _and_ has already deleted big chunks of its disk cache. Cheers, Kyle Moffett -BEGIN GEEK CODE BLOCK- Version: 3.12 GCM/CS/IT/U d- s++: a18 C>$ UB/L/X/*(+)>$ P+++()>$ L(+++) E W++(+) N+++(++) o? K? w--- O? M++ V? PS+() PE+(-) Y+ PGP+++ t+(+++) 5 X R? tv-(--) b(++) DI+ D+ G e->$ h!*()>++$ r !y?(-) --END GEEK CODE BLOCK-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 > Michael Buesch wrote: > >Quoting Matthias-Christian Ott <[EMAIL PROTECTED]>: > >>Hi! > >>I have mysterious Problem: > >>90 % of my Ram are used (340 MB), but 0 Byte of my Swap (2GB) is used > >>and about about 150 MB are swappable. > >> > >>[EMAIL PROTECTED] ~]$ free > >> total used free sharedbuffers cached > >>Mem:383868 362176 21692 0 12 208956 > >>-/+ buffers/cache: 153208 230660 Note that ~200MB are being used for disk caching. If your system need to allocate more ram, the disk cache will reduce before swap is used. Mark. - -- Mark Watts Senior Systems Engineer QinetiQ Trusted Information Management Trusted Solutions and Services group GPG Public Key ID: 455420ED -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFB/iVyBn4EFUVUIO0RAmRBAJ46Vk2Z69/i+bMrj1gbSF8obHgEkgCgw8iU NgRDBYk+YoiRuWZZ2gFT8NE= =R02H -END PGP SIGNATURE- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
On Mon Jan 31, 2005 at 13:44:04 +0100, Matthias-Christian Ott wrote: >Michael Buesch wrote: > >>Quoting Matthias-Christian Ott <[EMAIL PROTECTED]>: >> >> >>>Hi! >>>I have mysterious Problem: >>>90 % of my Ram are used (340 MB), but 0 Byte of my Swap (2GB) is used >>>and about about 150 MB are swappable. >>> >>>[EMAIL PROTECTED] ~]$ free >>>total used free sharedbuffers cached >>>Mem:383868 362176 21692 0 12 208956 >>>-/+ buffers/cache: 153208 230660 >>> >>> >> ^^ >>You have ~230M of 380M free. >>Nothing mysterious here. >> >> >Ok maybe I wasn't able to read the /free/ output correctly, but why is >no swap used (more than 60% ram are used)? Why would you want to use swap when you still have free RAM? The kernel isn't using swap because there is no need to. Benno - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
Michael Buesch wrote: Quoting Matthias-Christian Ott <[EMAIL PROTECTED]>: Hi! I have mysterious Problem: 90 % of my Ram are used (340 MB), but 0 Byte of my Swap (2GB) is used and about about 150 MB are swappable. [EMAIL PROTECTED] ~]$ free total used free sharedbuffers cached Mem:383868 362176 21692 0 12 208956 -/+ buffers/cache: 153208 230660 ^^ You have ~230M of 380M free. Nothing mysterious here. Swap: 2097136 02097136 [EMAIL PROTECTED] ~]$ cat /kernel-2.6.10-rc2-ott/config [..] CONFIG_SWAP=y [..] CONFIG_X86_BSWAP=y [..] [EMAIL PROTECTED] ~]$ dmesg [..] Adding 2097136k swap on /dev/discs/disc0/part2. Priority:-1 extents:1 [..] Matthias-Christian Ott - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ Ok maybe I wasn't able to read the /free/ output correctly, but why is no swap used (more than 60% ram are used)? Matthias-Christian Ott - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: My System doesn't use swap!
Quoting Matthias-Christian Ott <[EMAIL PROTECTED]>: > Hi! > I have mysterious Problem: > 90 % of my Ram are used (340 MB), but 0 Byte of my Swap (2GB) is used > and about about 150 MB are swappable. > > [EMAIL PROTECTED] ~]$ free > total used free sharedbuffers cached > Mem:383868 362176 21692 0 12 208956 > -/+ buffers/cache: 153208 230660 ^^ You have ~230M of 380M free. Nothing mysterious here. > Swap: 2097136 02097136 > > [EMAIL PROTECTED] ~]$ cat /kernel-2.6.10-rc2-ott/config > [..] > CONFIG_SWAP=y > [..] > CONFIG_X86_BSWAP=y > [..] > > [EMAIL PROTECTED] ~]$ dmesg > [..] > Adding 2097136k swap on /dev/discs/disc0/part2. Priority:-1 extents:1 > [..] > > Matthias-Christian Ott > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > > -- Regards Michael Buesch [ http://www.tuxsoft.de.vu ] pgpXetmBP1ZBx.pgp Description: PGP signature
My System doesn't use swap!
Hi! I have mysterious Problem: 90 % of my Ram are used (340 MB), but 0 Byte of my Swap (2GB) is used and about about 150 MB are swappable. [EMAIL PROTECTED] ~]$ free total used free sharedbuffers cached Mem:383868 362176 21692 0 12 208956 -/+ buffers/cache: 153208 230660 Swap: 2097136 02097136 [EMAIL PROTECTED] ~]$ cat /kernel-2.6.10-rc2-ott/config [..] CONFIG_SWAP=y [..] CONFIG_X86_BSWAP=y [..] [EMAIL PROTECTED] ~]$ dmesg [..] Adding 2097136k swap on /dev/discs/disc0/part2. Priority:-1 extents:1 [..] Matthias-Christian Ott - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
