Weird high load on server
Dan Track
dan.track at gmail.com
Tue Jul 19 15:07:17 UTC 2005
On 7/19/05, nodata <fedora at nodata.co.uk> wrote:
> > On 7/19/05, nodata <fedora at nodata.co.uk> wrote:
> >> > Hi Guys,
> >> >
> >> > Hope you experts can help me out here.
> >> >
> >> > Basically I have server running at a very high load 2.44, although
> >> > nothing is noticably high when using top. There aren't any processes
> >> > running on the box except the standard linux OS tools. This box is
> >> > used for backup, and only becomes active during the night.
> >> >
> >> > Its a compaq dl380 with a raid 5 configuration.
> >> >
> >> > Can anyone suggest what I can do to find out why the load is high?
> >> >
> >> > Thanks for your help in advance.
> >> >
> >> > Dan
> >> >
> >>
> >> I bet you have hanging nfs mounts.
> >> If the box is constantly at a load of around 2.44, and isn't sluggish, I
> >> wouldn't worry.
> >>
> >> Look at iostat, sar, etc. to find out why the load is like that.
> >>
> >
> >
> > Hi
> >
> > I've looked at these but can't see anything. The server doesn't mount
> > or export any filesystems using nfs or any other protocol. If it helps
> > here are the various outputs:
> >
> > uptime
> > 14:45:49 up 62 days, 43 min, 2 users, load average: 1.46, 1.57, 1.59
> >
> > sar 5 10
> > Linux 2.4.21-27.0.4.ELsmp (orion.gs.moneyextra.com) 19/07/05
> >
> > 14:46:02 CPU %user %nice %system %idle
> > 14:46:07 all 0.00 0.00 0.00 100.00
> > 14:46:12 all 0.00 0.00 0.10 99.90
> > 14:46:17 all 0.00 0.00 0.10 99.90
> > 14:46:22 all 0.00 0.00 0.00 100.00
> > 14:46:27 all 0.00 0.00 0.00 100.00
> > 14:46:32 all 0.00 0.00 0.10 99.90
> > 14:46:37 all 0.00 0.00 0.00 100.00
> > 14:46:42 all 0.10 0.00 0.31 99.59
> > 14:46:47 all 0.00 0.00 0.00 100.00
> > 14:46:52 all 0.00 0.00 0.00 100.00
> > Average: all 0.01 0.00 0.06 99.93
> >
> > vmstat -a
> > procs memory swap io system
> > cpu
> > r b swpd free inact active si so bi bo in cs us sy
> > wa id
> > 0 0 0 15404 189668 202836 0 0 3 1 0 2 3 4
> > 1 3
> >
> > free -m
> > total used free shared buffers cached
> > Mem: 498 483 15 0 128 301
> > -/+ buffers/cache: 53 445
> > Swap: 1027 0 1027
> >
> > iostat
> > Linux 2.4.21-27.0.4.ELsmp (orion.gs.moneyextra.com) 19/07/05
> >
> > avg-cpu: %user %nice %sys %idle
> > 3.11 0.00 3.72 93.17
> >
> > Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
> > /dev/ida/c0d0 19.68 427.93 279.15 2147483647 1400883506
> > /dev/ida/c0d0p1
> > 0.00 0.22 0.00 1087144 8986
> > /dev/ida/c0d0p2
> > 0.65 3.72 10.24 18680778 51401528
> > /dev/ida/c0d0p3
> > 0.00 0.00 0.00 248 0
> > /dev/ida/c0d0p4
> > 0.00 0.00 0.00 0 0
> > /dev/ida/c0d0p5
> > 0.74 3.90 6.88 19570498 34517568
> > /dev/ida/c0d0p6
> > 0.00 0.00 0.00 168 0
> > /dev/ida/c0d0p7
> > 0.00 0.00 0.00 168 0
> > /dev/ida/c0d0p8
> > 18.29 427.93 262.03 2147483647 1314955424
> >
> > top
> > 14:47:51 up 62 days, 45 min, 2 users, load average: 1.73, 1.61, 1.59
> > 61 processes: 60 sleeping, 1 running, 0 zombie, 0 stopped
> > CPU states: cpu user nice system irq softirq iowait idle
> > total 0.4% 0.0% 0.0% 0.0% 0.0% 0.0% 99.5%
> > cpu00 0.9% 0.0% 0.0% 0.0% 0.0% 0.0% 99.0%
> > cpu01 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0%
> > Mem: 510400k av, 495224k used, 15176k free, 0k shrd, 132000k
> > buff
> > 203040k actv, 182824k in_d, 6852k in_c
> > Swap: 1052592k av, 0k used, 1052592k free 308668k
> > cached
> >
> > PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
> > 13100 root 20 0 1092 1092 888 R 0.4 0.2 0:00 0 top
> > 1 root 15 0 512 512 452 S 0.0 0.1 1:18 0 init
> > 2 root RT 0 0 0 0 SW 0.0 0.0 0:00 0
> > migration/0
> > 3 root RT 0 0 0 0 SW 0.0 0.0 0:00 1
> > migration/1
> > 4 root 15 0 0 0 0 SW 0.0 0.0 0:00 1 keventd
> > 5 root 34 19 0 0 0 SWN 0.0 0.0 0:00 0
> > ksoftirqd/0
> > 6 root 34 19 0 0 0 SWN 0.0 0.0 0:00 1
> > ksoftirqd/1
> > 9 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 bdflush
> > 7 root 15 0 0 0 0 SW 0.0 0.0 70:21 0 kswapd
> > 8 root 15 0 0 0 0 SW 0.0 0.0 23:07 1 kscand
> > 10 root 15 0 0 0 0 SW 0.0 0.0 3:30 0 kupdated
> > 11 root 25 0 0 0 0 SW 0.0 0.0 0:00 0
> > mdrecoveryd
> > 18 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 ahc_dv_0
> > 19 root 25 0 0 0 0 SW 0.0 0.0 0:00 0
> > scsi_eh_0
> > 23 root 15 0 0 0 0 SW 0.0 0.0 2:30 1
> > kjournald
> > 192 root 15 0 0 0 0 SW 0.0 0.0 0:00 0
> > kjournald
> > 193 root 15 0 0 0 0 SW 0.0 0.0 13:57 1
> > kjournald
> > 194 root 15 0 0 0 0 SW 0.0 0.0 4:18 0
> > kjournald
> > 568 root 15 0 576 576 492 S 0.0 0.1 0:57 0 syslogd
> > 572 root 15 0 472 472 408 S 0.0 0.0 0:00 1 klogd
> > 582 root 15 0 452 452 388 S 0.0 0.0 5:33 1
> > irqbalance
> > 599 rpc 15 0 600 600 524 S 0.0 0.1 0:22 0 portmap
> > 618 rpcuser 25 0 720 720 644 S 0.0 0.1 0:00 0
> > rpc.statd
> > 629 root 15 0 400 400 344 S 0.0 0.0 0:18 0 mdadm
> > 712 root 15 0 3160 3160 2024 S 0.0 0.6 3:22 1 snmpd
> > 713 root 25 0 3160 3160 2024 S 0.0 0.6 0:00 0 snmpd
> > 722 root 15 0 1576 1576 1324 S 0.0 0.3 4:58 1 sshd
> >
> > Anyone have any ideas. Literally the box is sitting there not doing
> > anything that has been scheduled.
> >
> > This happens occassionally then the load spontaneously goes down. Do
> > you reckon it has something to do with the raid 5?
> >
> > Thanks
> > Dan
> >
>
> ps auxw | grep " D "
>
Hi,
I get the following:
ps auxw | grep " D "
root 15802 0.0 0.1 3688 660 pts/0 S 16:06 0:00 grep D
Dan
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