Date: Tue, 12 Dec 2000 13:38:18 -0800 From: Kachun Lee <kachun@pathlink.com> To: Matt Dillon <dillon@earth.backplane.com> Cc: freebsd-stable@freebsd.org Subject: Re: Extreme high load with 12/7 4-releng Message-ID: <200012122138.NAA69074@pathlink.net> In-Reply-To: <200012122046.eBCKkUc52350@earth.backplane.com> References: <200012120230.SAA32402@pathlink.net> <200012121801.KAA42878@pathlink.net>
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At 12:46 PM 12/12/00 -0800, you wrote: > >:Yep, they are news (nntp) frontends, but no feed stuff. They run a custom >:nntpd that access the spool by NFS. They have been running that way for >:several years and the last rev to the nntpd was at least 6 months old. This >:was the top from a server still running 4.1.1-releng (just before >:4.2-release): >: >:-------- >:last pid: 73544; load averages: 1.52, 2.07, 2.24 up 1+20:15:10 >:20:43:28 >:574 processes: 7 running, 567 sleeping >:CPU states: 19.5% user, 0.4% nice, 22.9% system, 9.9% interrupt, 47.3% idle >:Mem: 286M Active, 92M Inact, 107M Wired, 15M Cache, 61M Buf, 996K Free >:Swap: 600M Total, 600M Free >:------- >: >:I saw there was a big different in Inact and no swap used. >: >:>:----- >:>:last pid: 26893; load averages: 36.05, 40.55, 47.01 up 0+04:29:07 >:>:18:14:54 >:>:513 processes: 9 running, 503 sleeping, 1 zombie >:>:CPU states: 21.3% user, 0.7% nice, 30.0% system, 10.7% interrupt, 37.3% >:idle >:>:Mem: 196M Active, 204M Inact, 83M Wired, 17M Cache, 61M Buf, 1152K Free >:>:Swap: 600M Total, 17M Used, 583M Free, 2% Inuse, 232K Out >: >:Here was a pxl from one of the servers... thanks for helping >: >: UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND >: 0 0 0 0 -18 0 0 0 sched DLs ?? 0:00.74 (swapper) >:... > > Hmm. It all looks normal, even the swap useage. Except for the > load average. Is the machine less responsive then normal? It could > just be the way the load average is being computed. > > -Matt Sorry to say, the system performance degraded with the high load. In telnet, it felt like a system with load of 40. With the 'working' FreeBSD, the servers would still performance better (load >10) with twice the connections. I still suspect that it was related to the server start to swap heavily even with 200+M of Inact memory? The strange part was the swap Used stayed relatively low (>20M), but, with top, the swap In and Out changed every refresh. Regards Best regards To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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