Re: [asterisk-users] keep asterisk in RAM
Disable swap space. swapoff -a Jerry Geis wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). There are times when delays are noticed and I presume its due to linux swapping out the program. As if I call right back in then everything responds right away. Wait awhile and the same thing might occur. How can I keep asterisk always in RAM? I use CentOS 5. Thanks, jerry ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Alex Balashov - Principal Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
Next question will be How can I keep my server from crashing? :) (add more RAM... which may have been a good answer for question 1...) j On Tue, 24 Nov 2009, Alex Balashov wrote: Disable swap space. swapoff -a Jerry Geis wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). There are times when delays are noticed and I presume its due to linux swapping out the program. As if I call right back in then everything responds right away. Wait awhile and the same thing might occur. How can I keep asterisk always in RAM? I use CentOS 5. Thanks, jerry ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Alex Balashov - Principal Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tue, Nov 24, 2009 at 08:21:43AM -0500, Jerry Geis wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). There are times when delays are noticed and I presume its due to linux swapping out the program. As if I call right back in then everything responds right away. Wait awhile and the same thing might occur. How can I keep asterisk always in RAM? Theoretically - yes. Practically - some other component of the system will swap out and cause basically the same performance issues. What else takes much memory on that system? -- Tzafrir Cohen icq#16849755 jabber:tzafrir.co...@xorcom.com +972-50-7952406 mailto:tzafrir.co...@xorcom.com http://www.xorcom.com iax:gu...@local.xorcom.com/tzafrir ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
I was proceeding from the give them enough rope to hang themselves theory of technical support, which calls for doing just that when users insist on framing their question in terms of a solution they have already made up their mind on without examining whether they are asking the right question to begin with, or considering their problem in a larger context. Jeff LaCoursiere wrote: Next question will be How can I keep my server from crashing? :) (add more RAM... which may have been a good answer for question 1...) j On Tue, 24 Nov 2009, Alex Balashov wrote: Disable swap space. swapoff -a Jerry Geis wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). There are times when delays are noticed and I presume its due to linux swapping out the program. As if I call right back in then everything responds right away. Wait awhile and the same thing might occur. How can I keep asterisk always in RAM? I use CentOS 5. Thanks, jerry ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Alex Balashov - Principal Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Alex Balashov - Principal Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tue, Nov 24, 2009 at 11:21 AM, Jerry Geis ge...@pagestation.com wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). There are times when delays are noticed and I presume its due to linux swapping out the program. As if I call right back in then everything responds right away. Wait awhile and the same thing might occur. How can I keep asterisk always in RAM? How much RAM your system have? Concurrent calls? Write or encode calls on disk? You have other softwares (like databases) running on same machine? Maybe, you shoul run the vmstat, ps, top and other tools to detect the bootleneck on your system, and read about kernel swappiness: http://kerneltrap.org/node/3000 ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tue, Nov 24, 2009 at 2:36 PM, jefferson alexandre jefferson.alexan...@gmail.com wrote: On Tue, Nov 24, 2009 at 11:21 AM, Jerry Geis ge...@pagestation.com wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). On a closely related note, has anyone built a normal (not embedded) system on SSD? It might help if it works well with linux. It seems to make a huge difference with OS like OS X. /r ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On a closely related note, has anyone built a normal (not embedded) system on SSD? I've been running Asterisk on a 20GB SSD drive for a while now. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
I recently implemented a vmware host using SSDs for the VM storage. I wish you could see the grin on my face right now. It's so fast. Remember thought that all SSDs are NOT created equal... Be careful what you buy. snip On a closely related note, has anyone built a normal (not embedded) system on SSD? I've been running Asterisk on a 20GB SSD drive for a while now. /snip ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tue, Nov 24, 2009 at 3:42 PM, Richard Kenner ken...@gnat.com wrote: On a closely related note, has anyone built a normal (not embedded) system on SSD? I've been running Asterisk on a 20GB SSD drive for a while now. And? Noticed any significant performance advantage? /r ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tuesday 24 November 2009 07:21:43 Jerry Geis wrote: Is there a way to keep asterisk in RAM and tell linux not to swap it out (ever). There are times when delays are noticed and I presume its due to linux swapping out the program. As if I call right back in then everything responds right away. Wait awhile and the same thing might occur. How can I keep asterisk always in RAM? http://asterisk.drunkcoder.com/patches/20091124__dontswap.diff.txt And run with -S flag. -- Tilghman Lesher Digium, Inc. | Senior Software Developer twitter: Corydon76 | IRC: Corydon76-dig (Freenode) Check us out at: www.digium.com www.asterisk.org ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tue, 24 Nov 2009, Richard Kenner wrote: On a closely related note, has anyone built a normal (not embedded) system on SSD? I've been running Asterisk on a 20GB SSD drive for a while now. What mft/model? I was recently quoted a 4GB Compact Flash drive as part of a small system we plan to run asterisk on. Loosely tieing this to the recent thread on swap configuration, assuming a small number of SIP phones and no PSTN hardware, we were planning on 1GB of RAM to avoid swapping to this CF device. I know that CF cards have a limited number of writes before frying. If we keep it from using swap am I really only concerned about voicemail and logs? Cheers, j ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
What mft/model? Actually, it's 16GB, not 20GB. It's a Transcend TS16GSSD25S-S. I know that CF cards have a limited number of writes before frying. If we keep it from using swap am I really only concerned about voicemail and logs? That number is quite large, though. I'm taking backups and figure that it has a limited lifetime, but I have no idea if that's 2 years, 10, or 100. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
On Tue, 24 Nov 2009 14:56:32 + (UTC), Jeff LaCoursiere wrote: On Tue, 24 Nov 2009, Richard Kenner wrote: On a closely related note, has anyone built a normal (not embedded) system on SSD? I've been running Asterisk on a 20GB SSD drive for a while now. What mft/model? I was recently quoted a 4GB Compact Flash drive as part of a small system we plan to run asterisk on. Loosely tieing this to the recent thread on swap configuration, assuming a small number of SIP phones and no PSTN hardware, we were planning on 1GB of RAM to avoid swapping to this CF device. I know that CF cards have a limited number of writes before frying. If we keep it from using swap am I really only concerned about voicemail and logs? That will work fine if you select an Asterisk distro intended for such applications, like Astlinux or Askozia. Both of these systems manage disk acces is such a way that they maximize the lifespan of flash media. Both are in fact intended to boot run from much small flash devices that are commonplace these days. They harken back to a time when 1 GB was huge and expensive CF card. There are many Astlinux systems out there that have been running on 64 MB CF cards in IDE adapters, and storing their configs VM to either a separate partition in the CF or a USB stick. I wrote this up back in Jan 2006. http://www.mgraves.org/voip/?p=1092 Michael Michael -- Michael Graves mgravesatmstvp.com http://www.mgraves.org o713-861-4005 c713-201-1262 sip:mgra...@mstvp.onsip.com skype mjgraves Twitter mjgraves ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
And? Noticed any significant performance advantage? I never ran it any other way, so have no comparison point. I didn't do it for performance reasons, but reliability. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] keep asterisk in RAM
snip And? Noticed any significant performance advantage? /snip Massive increase in performance on mysql VMs with database sizes that exceed memory size (file caching). Boot times on VMs (windows and linux) under 10 seconds. There is no noticeable change in performance for normal operations on normal VMs because most of the files they're IO blocked by are already cached in memory. I actually went with consumer-grade SSDs (4x OCZ 120gb models) in a raid 10. I know most people say 'those aren't good enough for me'. They are! And as long as you plan for some of them to fail over time, you're still ahead on cost and performance vs enterprise-grade SSDs (read: intel). Synthetic testing with hdparm (sdb is the SSD array, sda is the spinning disk array) is below. This comparison is against 7200rpm disks; I don't have hdparm installed on a box running 15k rpm disks: hdparm -tT --direct /dev/sdb /dev/sdb: Timing O_DIRECT cached reads: 1128 MB in 2.00 seconds = 563.48 MB/sec Timing O_DIRECT disk reads: 1276 MB in 3.00 seconds = 425.01 MB/sec hdparm -tT --direct /dev/sda /dev/sda: Timing O_DIRECT cached reads: 138 MB in 2.03 seconds = 68.03 MB/sec Timing O_DIRECT disk reads: 364 MB in 3.00 seconds = 121.32 MB/sec ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
