Re: Swap and memory optimization
I would just bump the ram to 2gigs or 4 if it supports it and call it good. You should be fine. On Thu, Oct 1, 2009 at 8:58 AM, Bill Moran wmo...@potentialtech.com wrote: In response to Dan Nelson dnel...@allantgroup.com: In the last episode (Oct 01), Bill Moran said: bsd b...@todoo.biz wrote: I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 Works quite well. As I plan to put 100 more mail accounts soon on the server I was wondering if the memory swap was ok on the server considering these figures: last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 125 processes: 1 running, 124 sleeping CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse Though It looks good to me - the server swaps a bit (between 8 to 14%) and there is not much memory left. Looks like the server would run more smoothly with a bit more RAM. At least an additional 256M, I would think, but considering the price of RAM, you might as well just up it to 2G. The amount of used swap is much less important than whether you are actively swapping (if there are In/Out values on the Swap line in top, or if vmstat 1 shows nonzero values in the pi/po columns). 160MB of used swap is fine if it's just unused daemons (getty, idle webserver, etc). More memory can never hurt, but it doesn't seem like it's urgently needed here. I don't know about that, Dan. Especially considering it's a mail server he's talking about, there's no RAM left for disk cache on that machine. We've seen performance gains on our mail server by putting obscene amounts of RAM into it. After a bit of use, FreeBSD ends up having 6.5G of inactive RAM, which I assume is cache of mailboxes. The result is that while watching gstat, the amount of disk reads is very low (since a lot of data is already in RAM) and the IO is available to do fast writes when new mail comes in. -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org -- Who knew ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Swap and memory optimization
Hello, I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 Works quite well. As I plan to put 100 more mail accounts soon on the server I was wondering if the memory swap was ok on the server considering these figures: last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 125 processes: 1 running, 124 sleeping CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse Though It looks good to me - the server swaps a bit (between 8 to 14%) and there is not much memory left. Let me know what you think about these figures. Thanks. Gregober --- PGP ID -- 0x1BA3C2FD bsd @at@ todoo.biz P Please consider your environmental responsibility before printing this e-mail ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Swap and memory optimization
bsd b...@todoo.biz wrote: Hello, I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 Works quite well. As I plan to put 100 more mail accounts soon on the server I was wondering if the memory swap was ok on the server considering these figures: last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 125 processes: 1 running, 124 sleeping CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse Though It looks good to me - the server swaps a bit (between 8 to 14%) and there is not much memory left. Looks like the server would run more smoothly with a bit more RAM. At least an additional 256M, I would think, but considering the price of RAM, you might as well just up it to 2G. -- Bill Moran http://www.potentialtech.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Swap and memory optimization
On Thu, Oct 01, 2009 at 09:58:36AM +0200, bsd wrote: Hello, I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 Works quite well. As I plan to put 100 more mail accounts soon on the server I was wondering if the memory swap was ok on the server considering these figures: last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 125 processes: 1 running, 124 sleeping CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse Though It looks good to me - the server swaps a bit (between 8 to 14%) and there is not much memory left. Let me know what you think about these figures. Unless something else is going on or you are running some commercial server that gets huge amounts of traffic, you should have no capacity problem with this setup. You might want to upgrade to a more recent FreeBSD. jerry Thanks. Gregober --- PGP ID -- 0x1BA3C2FD bsd @at@ todoo.biz P Please consider your environmental responsibility before printing this e-mail ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Swap and memory optimization
In the last episode (Oct 01), Bill Moran said: bsd b...@todoo.biz wrote: I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 Works quite well. As I plan to put 100 more mail accounts soon on the server I was wondering if the memory swap was ok on the server considering these figures: last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 125 processes: 1 running, 124 sleeping CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse Though It looks good to me - the server swaps a bit (between 8 to 14%) and there is not much memory left. Looks like the server would run more smoothly with a bit more RAM. At least an additional 256M, I would think, but considering the price of RAM, you might as well just up it to 2G. The amount of used swap is much less important than whether you are actively swapping (if there are In/Out values on the Swap line in top, or if vmstat 1 shows nonzero values in the pi/po columns). 160MB of used swap is fine if it's just unused daemons (getty, idle webserver, etc). More memory can never hurt, but it doesn't seem like it's urgently needed here. -- Dan Nelson dnel...@allantgroup.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Swap and memory optimization
In response to Dan Nelson dnel...@allantgroup.com: In the last episode (Oct 01), Bill Moran said: bsd b...@todoo.biz wrote: I have a FBSD 6.4p7 box that I use as a mail server - 1Go RAM - RAID1 Works quite well. As I plan to put 100 more mail accounts soon on the server I was wondering if the memory swap was ok on the server considering these figures: last pid: 18956; load averages: 0.04, 0.11, 0.05 up 19+08:36:23 09:53:38 125 processes: 1 running, 124 sleeping CPU: 0.0% user, 0.0% nice, 1.5% system, 0.4% interrupt, 98.1% idle Mem: 499M Active, 70M Inact, 362M Wired, 41M Cache, 111M Buf, 20M Free Swap: 2000M Total, 160M Used, 1840M Free, 8% Inuse Though It looks good to me - the server swaps a bit (between 8 to 14%) and there is not much memory left. Looks like the server would run more smoothly with a bit more RAM. At least an additional 256M, I would think, but considering the price of RAM, you might as well just up it to 2G. The amount of used swap is much less important than whether you are actively swapping (if there are In/Out values on the Swap line in top, or if vmstat 1 shows nonzero values in the pi/po columns). 160MB of used swap is fine if it's just unused daemons (getty, idle webserver, etc). More memory can never hurt, but it doesn't seem like it's urgently needed here. I don't know about that, Dan. Especially considering it's a mail server he's talking about, there's no RAM left for disk cache on that machine. We've seen performance gains on our mail server by putting obscene amounts of RAM into it. After a bit of use, FreeBSD ends up having 6.5G of inactive RAM, which I assume is cache of mailboxes. The result is that while watching gstat, the amount of disk reads is very low (since a lot of data is already in RAM) and the IO is available to do fast writes when new mail comes in. -- Bill Moran http://www.potentialtech.com http://people.collaborativefusion.com/~wmoran/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
