On Tue, Mar 7, 2017 at 3:14 PM, Erich Dollansky <erichsfreebsdl...@alogt.com > wrote:
> Hi, > > On Tue, 7 Mar 2017 23:30:58 +1100 (EST) > Ian Smith <smi...@nimnet.asn.au> wrote: > > > On Tue, 7 Mar 2017 10:19:35 +0800, Erich Dollansky wrote: > > > Hi, > > > > > > I wonder about the slow speed of my machine while top shows ample > > > inactive memory: > > > > ( quoting from this top output because it's neater :) > > > > > last pid: 85287; load averages: 2.56, 2.44, 1.68 > > > up 6+10:24:45 10:13:36 191 processes: 5 running, 186 sleeping > > > CPU 0: 47.1% user, 0.0% nice, 51.4% system, 0.0% interrupt, 1.6% > > > idle CPU 1: 38.4% user, 0.0% nice, 60.4% system, 0.0% interrupt, > > > 1.2% idle CPU 2: 38.8% user, 0.0% nice, 59.2% system, 0.0% > > > interrupt, 2.0% idle CPU 3: 45.5% user, 0.0% nice, 51.0% system, > > > 0.4% interrupt, 3.1% idle Mem: 677M Active, 5600M Inact, 1083M > > > Wired, 178M Cache, 816M Buf,301M Free > > > Swap: 16G Total, 1352M Used, 15G Free, 8% Inuse > > > > Others have covered the swap / inactive memory issue. > > > > But I'd expect this to be slow, for any new work anyway .. there's > > next to no idle on any CPU. I'd be asking, what's all of that system > > usage? > > > this is building ports in the background. Still, used doing this ones a > month, I know the feeling when the ports are updated. This one was > really slow. Hopefully, it was just an unlucky coincidence. > > I rebooted meanwhile the machine. It is faster now, I would say, it is > back to normal now. It did not come to its limits since the new start. > It is now on: > > FreeBSD 10.3-STABLE #3 r314363 > > Erich > Well, looks like over half of the CPU is running in system space and that seems rather high for what I would assume is compilation. I thinnk you will need to poke around with things like systat, and the like to see just what the system is doing for 55% or so of all CPUs. Since there doe snot seem to be a lot of IO or memory at issue, the various command for those are probably not very interesting. Probably not lock stats, either. This reminds me of when some operation (IIRC NFS related) was calling system time routines that are fairly expensive on FreeBSD almost continually. -- Kevin Oberman, Part time kid herder and retired Network Engineer E-mail: rkober...@gmail.com PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683 _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
