very high wait rates @pe2600
rico reichenberg
reichenberg at ksu-soft.de
Sat Oct 30 21:52:08 CDT 2004
hello
for example:
i copy a 3gb file from sdc1 -> sdb1
the wait rates in top are very high. til 90%.
vmstat shows 0-30.
how can i found out why wait is so high?
another problem:
used swap is 700mb???
why is so much swap used?
which command tells me which process is swapped out?
thx for your help!!
rico
below my configuration and the output.
pe2600
2gb
2xcpu
perc4/di
6x73gb
slackware 10.0
kernel 2.6.9
xfs-filesystem on all partitions
for oracle i am using hugetlb:
/usr/bin/echo 360 > /proc/sys/vm/nr_hugepages
/dev/sda = 0+1 = raid1 = operating system
/dev/sdb = 2+3+4 = raid0 = oradata
/dev/sdc = raid0 = samba-fileserver
#top
top - 16:32:03 up 4 days, 22:20, 2 users, load average: 0.26, 0.07, 0.08
Tasks: 101 total, 1 running, 100 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0% us, 1.0% sy, 0.0% ni, 99.0% id, 0.0% wa, 0.0% hi, 0.0% si
Cpu1 : 0.0% us, 2.0% sy, 0.0% ni, 94.1% id, 4.0% wa, 0.0% hi, 0.0% si
Cpu2 : 2.0% us, 9.9% sy, 0.0% ni, 0.0% id, 83.2% wa, 1.0% hi, 4.0% si
Cpu3 : 0.0% us, 2.0% sy, 0.0% ni, 92.2% id, 5.9% wa, 0.0% hi, 0.0% si
Mem: 2075688k total, 2065880k used, 9808k free, 0k buffers
Swap: 1992040k total, 724400k used, 1267640k free, 523232k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31376 reichenb 15 0 3932 1844 3524 D 8.0 0.1 0:32.59 /usr/bin/mc -P /tmp/mc-reichenberg/mc.pwd.21286
76 root 15 0 0 0 0 D 7.0 0.0 5:55.50 [kswapd0]
31485 root 16 0 1956 1044 1776 R 2.0 0.1 0:00.05 top
1 root 16 0 480 76 456 S 0.0 0.0 0:01.23 init [3]
#df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda4 67G 4.8G 62G 8% /
/dev/sda1 278M 11M 268M 4% /boot
/dev/sdb1 205G 41G 164G 20% /mnt/oracle
/dev/sdc1 69G 61G 7.8G 89% /mnt/backup
tmpfs 1014M 0 1014M 0% /1
#free
total used free shared buffers cached
Mem: 2075688 1964920 110768 0 0 419648
-/+ buffers/cache: 1545272 530416
Swap: 1992040 718708 1273332
#swapon -s
Filename Type Size Used Priority
/dev/sda2 partition 996020 714808 -1
/dev/sda3 partition 996020 0 -2
#vmstat 1
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 769280 82688 0 458912 20 9 2 7 22 12 0 0 99 1
0 1 769280 6604 0 534528 0 0 40192 13 1690 1081 1 5 75 19
1 1 769280 22300 0 518140 0 0 46848 22880 2024 6654 3 9 67 21
0 1 769280 22480 0 517528 0 0 39168 28376 2272 5116 2 8 73 17
0 2 769280 4624 0 535140 0 0 52096 29704 2228 5025 2 10 73 16
0 2 769280 12552 0 527320 0 0 22144 58563 2368 3459 1 6 71 22
2 0 769280 9352 0 530652 0 0 6784 81908 2582 847 1 3 75 21
0 1 769280 7432 0 532624 0 0 64256 0 2064 7384 3 11 72 13
1 0 769280 20920 0 519228 0 0 37504 12200 1848 5831 2 7 71 19
0 2 769280 1464 0 538540 0 0 12160 91140 2552 542 1 4 72 23
1 0 769280 3656 0 536636 0 0 40080 20752 2145 4895 2 8 73 17
0 1 769280 5528 0 534732 0 0 54784 6392 2048 7360 2 11 70 16
0 2 769280 23132 0 517256 0 0 9984 93188 2536 2306 0 5 72 23
0 1 769280 5656 0 534596 0 0 53120 9920 2187 5367 3 9 73 15
0 3 769280 8980 0 531332 0 0 60800 9272 2033 7214 3 11 71 15
0 1 769280 7440 0 532760 0 0 3328 93862 2618 498 0 3 74 23
0 1 769280 7320 0 532964 0 0 50968 33 1968 6397 3 9 73 16
MfG
Rico Reichenberg
GPG Public Key ID: 0xE7440BFF
----
KSU-Soft GmbH
http://www.ksu-soft.de
http://www.ksu-soft.de/ksuforum
reichenberg at ksu-soft.de
Tel: 0395/4226918
Fax: 0395/4226919
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