Re: tuning a system for a single user
On Mon, Apr 4, 2011 at 7:32 PM, Eitan Adler wrote: > > I believe no FreeBSD system is "single user". As root, daemon users, > > system users, "nobody" is required for running system smoothly, > > securely and easy, so scheduling is nessecary :) > > Obviously :-) > > I guess a better way to ask the question would be "for a desktop > user". I see a lot tuning guides that show how to getting scalable > systems - but few show potential changes for desktop users. > Some people have reported setting kern.sched.preempt_thresh=224 yields a smoother desktop experience, but I don't know exactly what that sysctl actually changes, nor have I tried it myself. I haven't experienced any thing I would consider a problem with my FreeBSD desktop experience, but my machines are relatively well powered. If you're targeting something like an embedded system, I'd guess you'd find the lowest hanging fruit by profiling a specific workload. I imagine it would start to get pretty complicated quite rapidly if you're in a complex environment as what's good for one workload might be rather poor on another. I might be way off in guessing your end goal, but what I would do on the embedded system is develop a minimal baseline automated testing for each subsystem(eg disk, network) then tie that into something like ministat(1) and one of those graphing utilities. Something like that could give you a comprehensive picture of what changes to kernel, sysctl's, etc are doing to performance. -- Adam Vande More ___ 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: tuning a system for a single user
On Mon, Apr 4, 2011 at 9:42 AM, Kristaps Kūlis wrote: > Hi, > I believe no FreeBSD system is "single user". As root, daemon users, > system users, "nobody" is required for running system smoothly, > securely and easy, so scheduling is nessecary :) Obviously :-) I guess a better way to ask the question would be "for a desktop user". I see a lot tuning guides that show how to getting scalable systems - but few show potential changes for desktop users. -- Eitan Adler ___ 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: tuning a system for a single user
Hi, I believe no FreeBSD system is "single user". As root, daemon users, system users, "nobody" is required for running system smoothly, securely and easy, so scheduling is nessecary :) Quotas / MAC / Auditing can be disabled by compiling your own kernel, please refer to handbook for futher info. kern.maxusers is autotuned. FreeBSD is multiuser OS, if you wan't singleuser os, install FreeDOS :) Kristaps Kūlis On Sat, Apr 2, 2011 at 5:24 AM, Eitan Adler wrote: > When I look for tuning guides online, or reading tuning(7) I find a > lot of guides for tuning a system for multiple users or for specific > purposes (web servers, file servers, etc) > > I am looking for specific tunables that might make the experience of > using FreeBSD better. I found the sysctl kern.maxusers but I'm unsure > how things affects things. Can I reduce the amount of time, memory, > etc the kernel spends enforcing quota, scheduling, etc? > > I don't have anything particular in mind - just want to get a general > set of tunables I might be interested in. > > > -- > Eitan Adler > ___ > 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: tuning a system for a single user
On Fri, 1 Apr 2011, Eitan Adler wrote: When I look for tuning guides online, or reading tuning(7) I find a lot of guides for tuning a system for multiple users or for specific purposes (web servers, file servers, etc) I am looking for specific tunables that might make the experience of using FreeBSD better. I found the sysctl kern.maxusers but I'm unsure how things affects things. Can I reduce the amount of time, memory, etc the kernel spends enforcing quota, scheduling, etc? I don't have anything particular in mind - just want to get a general set of tunables I might be interested in. Since you have nothing particular in mind: Did you have a look at # man tuning Might be a good starting point. Greetings Uli. -- Eitan Adler ___ 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" | Peter Ulrich Kruppa | Wuppertal | Germany ___ 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"
tuning a system for a single user
When I look for tuning guides online, or reading tuning(7) I find a lot of guides for tuning a system for multiple users or for specific purposes (web servers, file servers, etc) I am looking for specific tunables that might make the experience of using FreeBSD better. I found the sysctl kern.maxusers but I'm unsure how things affects things. Can I reduce the amount of time, memory, etc the kernel spends enforcing quota, scheduling, etc? I don't have anything particular in mind - just want to get a general set of tunables I might be interested in. -- Eitan Adler ___ 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"
Tuning a system..
We have a pretty high load mail server that does AV and spam filtering. I am looking to perf. tune this machine. It's FreeBSD 4.9-REL and Postfix. I am trying to correlate the info in systat to things I need to worry about. I am using systat with vmstat output since that seems to basically show everything you need to see. By the way, I did read 'man tuning'. First, I see that my memory is fine: 3 usersLoad 9.75 4.46 3.24 Mar 15 17:02 Mem:KBREALVIRTUAL VN PAGER SWAP PAGER Tot Share TotShareFree in out in out Act 1067128704 303637630772 35356 count All 502468 37816 3878800 181488 pages The major thing I'm looking at is SWAP PAGER: SWAP PAGER in out I see that I have processes in the run state and 14 waiting on the disk: Proc:r p d s wCsw Trp Sys Int Sof Flt 814 77 6305 297429015 950 1863 2293 I have 77 processes sleeping. I have 0 processes in w state, which means that my CPU isn't having a problem. I am spending a lot of time in sys and the rest in user: 49.5%Sys 1.7%Intr 44.5%User 0.0%Nice 4.4%Idl Here are my disks: Disks aacd0 acd0 KB/t 13.19 0.00 tps 111 0 MB/s 1.43 0.00 % busy2 0 >From %Sys I would say that disk is a problem for us. However, I'm having problems really understanding the numbers for Disks. We are running the server on RAID-1 (2 disks) IDE. What should I be looking for here? Here is the right side: 2626 cow 867 total 106472 wireata0 irq14 147376 act 464 bge0 irq11 222104 inact 110 aac0 irq7 28304 cache atkbd0 irq 6992 free100 clk irq0 daefr 128 rtc irq8 2841 prcfr react pdwake pdpgs intrn 62032 buf 508 dirtybuf 40239 desiredvnodes 38005 numvnodes 13105 freevnodes ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
