Fwd: NFS , Kjournald - status D (uninterruptible sleep) - maquina lenta.
From: Denis
Date: Fri Dec 14 2007 - 16:33:20 EST
Dears, I've got a double dual xeon wich sometimes is getting too slow.
While i was observing one of these slowly times, I realized the time
wait of processors come close to 100% and nfsd and kjournald process
become to D status (uniterruptible sleep) .Does someone know why this
can be happening or how can I troubleshoot it?
Below is a 'draw' of my top at one of these moments.
[root@cromo src]# top
top - 10:59:02 up 6 days, 19:30, 17 users, load average: 14.77, 13.46, 13.00
Tasks: 189 total, 1 running, 188 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0% us, 0.4% sy, 0.0% ni, 0.2% id, 98.5% wa, 0.0% hi, 0.9% si
Cpu1 : 0.0% us, 0.4% sy, 0.0% ni, 0.0% id, 99.6% wa, 0.0% hi, 0.0% si
Cpu2 : 0.0% us, 0.2% sy, 0.0% ni, 7.8% id, 92.0% wa, 0.0% hi, 0.0% si
Cpu3 : 0.2% us, 0.8% sy, 0.0% ni, 0.0% id, 98.7% wa, 0.2% hi, 0.0% si
Mem: 4025540k total, 4018264k used, 7276k free, 7908k buffers
Swap: 4096564k total, 3288k used, 4093276k free, 3553252k cached
3941 root 15 0 0 0 0 D 2 0.0 80:29.30 nfsd
3938 root 15 0 0 0 0 D 1 0.0 81:02.02 nfsd
2459 root 15 0 0 0 0 D 1 0.0 30:57.04 kjournald
3937 root 15 0 0 0 0 D 1 0.0 82:07.99 nfsd
96 root 15 0 0 0 0 S 0 0.0 34:12.48 kswapd0
3940 root 15 0 0 0 0 D 0 0.0 80:22.55 nfsd
3942 root 15 0 0 0 0 D 0 0.0 80:23.66 nfsd
3939 root 15 0 0 0 0 D 0 0.0 82:22.55 nfsd
4283 root 16 0 20936 8136 1276 S 0 0.2 0:44.47 hald
21289 denismpa 16 0 6280 1092 776 R 0 0.0 0:00.12 top
1 root 16 0 4752 552 460 S 0 0.0 0:01.28 init
2 root RT 0 0 0 0 S 0 0.0 0:00.21 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:00.05 ksoftirqd/0
4 root RT 0 0 0 0 S 0 0.0 0:00.28 migration/1
5 root 34 19 0 0 0 S 0 0.0 0:00.09 ksoftirqd/1
6 root RT 0 0 0 0 S 0 0.0 0:00.15 migration/2
7 root 34 19 0 0 0 S 0 0.0 0:00.05 ksoftirqd/2
8 root RT 0 0 0 0 S 0 0.0 0:00.15 migration/3
9 root 34 19 0 0 0 S 0 0.0 0:00.06 ksoftirqd/3
10 root 5 -10 0 0 0 S 0 0.0 0:01.01 events/0
11 root 5 -10 0 0 0 S 0 0.0 0:00.11 events/1
12 root 5 -10 0 0 0 S 0 0.0 0:00.06 events/2
13 root 5 -10 0 0 0 S 0 0.0 0:00.12 events/3
14 root 5 -10 0 0 0 S 0 0.0 0:00.00 khelper
15 root 15 -10 0 0 0 S 0 0.0 0:00.00 kacpid
63 root 5 -10 0 0 0 S 0 0.0 0: 00.00 kblockd/0
64 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/1
65 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/2
66 root 5 -10 0 0 0 S 0 0.0 0: 00.00 kblockd/3
67 root 15 0 0 0 0 S 0 0.0 0:00.06 khubd
97 root 12 -10 0 0 0 S 0 0.0 0:00.00 aio/0
98 root 5 -10 0 0 0 S 0 0.0 0:00.00 aio/1
99 root 5 -10 0 0 0 S 0 0.0 0:00.00 aio/2
100 root 5 -10 0 0 0 S 0 0.0 0:00.00 aio/3
244 root 23 0 0 0 0 S 0 0.0 0:00.00 kseriod
359 root 20 0 0 0 0 S 0 0.0 0:00.00 scsi_eh_0
360 root 15 0 0 0 0 S 0 0.0 0:00.00 aacraid
379 root 5 -10 0 0 0 S 0 0.0 0:00.00 ata/0
380 root 5 -10 0 0 0 S 0 0.0 0: 00.00 ata/1
381 root 5 -10 0 0 0 S 0 0.0 0:00.00 ata/2
382 root 8 -10 0 0 0 S 0 0.0 0:00.00 ata/3
388 root 20 0 0 0 0 S 0 0.0 0:00.00 scsi_eh_1
389 root 21 0 0 0 0 S 0 0.0 0:00.00 scsi_eh_2
403 root 15 0 0 0 0 D 0 0.0 0:03.87 kjournald
1708 root 6 -10 3604 444 364 S 0 0.0 0:00.00 udevd
Thanks and regards
--
Denis Anjos.
Cisco Certified Network Associate.
Universidade Federal do ABC
Santo André - SP - BR
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