Re: swap device io

From: hopehope_123 (hopehope_123_at_yahoo.com)
Date: 09/23/05 

Date: 22 Sep 2005 23:16:49 -0700

Hi Tommy ,

This is /etc/raidtab:

raiddev /dev/md2
raid-level 1
nr-raid-disks 2
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
    device /dev/sda2
    raid-disk 0
    device /dev/sdb2
    raid-disk 1

When i check the sda2 and sdb2 i see no io , but the system pageout
lots of pages.

[oracle@tanidw1 data]$ iostat -x /dev/sda2 1
Linux 2.4.18-e.37smp (tanidw1) 09/23/2005

avg-cpu: %user %nice %sys %idle
         121.03 0.02 34.80 1022.35

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sda2 0.01 2.02 0.63 1.93 20.50 126.67 57.40 0.00
0.19 0.22 0.06

avg-cpu: %user %nice %sys %idle
         458.25 0.00 76.25 489.50

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sda2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00

avg-cpu: %user %nice %sys %idle
         451.00 0.00 91.00 482.00

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sda2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00

avg-cpu: %user %nice %sys %idle
         424.25 0.00 151.25 448.50

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sda2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00

[oracle@tanidw1 data]$ iostat -x /dev/sdb2 1
Linux 2.4.18-e.37smp (tanidw1) 09/23/2005

avg-cpu: %user %nice %sys %idle
         121.03 0.02 34.80 1022.35

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sdb2 0.01 2.02 0.63 1.93 20.56 126.67 57.35 0.00
0.38 0.20 0.05

avg-cpu: %user %nice %sys %idle
         486.25 0.00 87.00 450.75

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sdb2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00

avg-cpu: %user %nice %sys %idle
         428.00 0.00 60.00 536.00

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sdb2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00

avg-cpu: %user %nice %sys %idle
         325.50 0.00 41.25 657.25

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz
await svctm %util
sdb2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00

sar -B

08:15:06 AM pgpgin/s pgpgout/s activepg inadtypg inaclnpg inatarpg
08:15:09 AM 49196.00 16692.67 204807 93075 14122 62400
08:15:12 AM 38528.58 21267.10 204846 93075 14122 62408

Kind Regards,
tolga

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