my system is running oracle9i with ZFS and some statistic is strange. iostat
output is show disk is busy then i run iotop for find out what's process
consume io and sched is use more than other. please suggest me how to reduce
disk busy
many thanks
Pao.
[b]iostat output[/b]
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 0.2 0.0 1.6 0.0 0.0 0.0 9.6 0 0 c0t0d0s0
0.0 0.2 0.0 1.6 0.0 0.0 0.0 10.5 0 0 c0t1d0s0
0.0 0.4 0.0 0.2 0.0 0.0 0.0 3.8 0 0 c0t1d0s7
650.8 6.8 82457.2 31.8 0.0 4.8 0.0 7.4 0 74
c2t500507630510040Cd2s0
631.2 6.2 79903.5 84.8 0.0 4.8 0.0 7.5 0 74
c2t500507630510040Cd1s0
638.2 15.4 80867.5 121.8 0.0 4.8 0.0 7.3 0 74
c2t500507630523C40Cd2s0
640.2 6.4 81059.5 107.5 0.0 4.9 0.0 7.5 0 73
c2t500507630523C40Cd1s0
638.8 6.8 80918.5 105.3 0.0 4.9 0.0 7.6 0 72
c3t50050763051B040Cd2s0
634.0 15.8 80467.7 194.5 0.0 4.7 0.0 7.2 0 73
c3t50050763051B040Cd1s0
640.4 7.2 81212.8 81.3 0.0 4.8 0.0 7.4 0 74
c3t500507630528C40Cd2s0
650.0 4.4 82451.9 29.7 0.0 4.9 0.0 7.6 0 75
c3t500507630528C40Cd1s0
[b]
iotop output[/b]
2008 Mar 27 01:55:36, load: 4.07, disk_r: 1065948 KB, disk_w: 851 KB
UID PID PPID CMD DEVICE MAJ MIN D BYTES
0 3 0 fsflush sd18 32 151 W 1024
0 0 0 sched ssd0 118 0 W 4096
0 0 0 sched ssd3 118 24 W 4096
0 0 0 sched ssd9 118 72 W 4096
500 14738 1 oracle ssd1 118 8 W 4096
500 14911 1 oracle ssd9 118 72 R 7680
0 0 0 sched ssd4 118 32 W 8192
0 0 0 sched ssd6 118 48 W 8192
0 3 0 fsflush md0 85 0 W 14336
0 3 0 fsflush sd17 32 136 W 14336
0 3 0 fsflush sd18 32 144 W 14336
500 14738 1 oracle ssd0 118 0 W 20480
500 14736 1 oracle ssd3 118 24 W 24576
500 14736 1 oracle ssd7 118 56 W 28672
500 14736 1 oracle ssd1 118 8 W 32768
500 14736 1 oracle ssd9 118 72 W 32768
500 14738 1 oracle ssd4 118 32 W 36864
500 14736 1 oracle ssd10 118 80 W 40960
500 14736 1 oracle ssd6 118 48 W 40960
500 14736 1 oracle ssd4 118 32 W 49152
500 14972 1 oracle ssd1 118 8 R 65536
500 14972 1 oracle ssd9 118 72 R 65536
500 15104 1 oracle ssd7 118 56 R 65536
500 14736 1 oracle ssd0 118 0 W 73728
0 0 0 sched ssd7 118 56 131072
500 14911 1 oracle ssd0 118 0 R 131072
500 14911 1 oracle ssd10 118 80 R 131072
500 14911 1 oracle ssd4 118 32 R 131072
500 14911 1 oracle ssd6 118 48 R 131072
500 14911 1 oracle ssd7 118 56 R 131072
500 14958 1 oracle ssd10 118 80 R 131072
500 14970 1 oracle ssd0 118 0 R 131072
500 14970 1 oracle ssd10 118 80 R 131072
500 14970 1 oracle ssd6 118 48 R 131072
500 14972 1 oracle ssd10 118 80 R 131072
500 14972 1 oracle ssd3 118 24 R 131072
500 14972 1 oracle ssd4 118 32 R 131072
500 15104 1 oracle ssd4 118 32 R 131072
500 14968 1 oracle ssd4 118 32 R 196608
500 14970 1 oracle ssd3 118 24 R 262144
500 14970 1 oracle ssd7 118 56 R 262144
500 14970 1 oracle ssd9 118 72 R 262144
500 14972 1 oracle ssd6 118 48 R 327680
500 14968 1 oracle ssd1 118 8 R 393216
500 14970 1 oracle ssd4 118 32 R 393216
500 14968 1 oracle ssd0 118 0 R 458752
500 14968 1 oracle ssd10 118 80 R 458752
500 14968 1 oracle ssd6 118 48 R 524288
500 14968 1 oracle ssd9 118 72 R 524288
500 14968 1 oracle ssd3 118 24 R 786432
0 0 0 ssd10 118 80 851968
500 14968 1 oracle ssd7 118 56 R 851968
0 0 0 ssd3 118 24 1179648
0 0 0 ssd4 118 32 1441792
0 0 0 ssd7 118 56 2228224
0 0 0 ssd9 118 72 2228224
0 0 0 ssd6 118 48 2490368
0 0 0 ssd0 118 0 2883584
0 0 0 ssd1 118 8 3145728
500 15106 1 oracle ssd3 118 24 R 4587520
500 15106 1 oracle ssd7 118 56 R 4784128
500 15106 1 oracle ssd10 118 80 R 5046272
500 15106 1 oracle ssd0 118 0 R 5439488
500 15106 1 oracle ssd6 118 48 R 5963776
500 15106 1 oracle ssd1 118 8 R 6291456
500 15106 1 oracle ssd4 118 32 R 6946816
500 15106 1 oracle ssd9 118 72 R 7143424
500 14899 1 oracle ssd10 118 80 R 8781824
500 14899 1 oracle ssd3 118 24 R 8781824
500 14899 1 oracle ssd1 118 8 R 8912896
500 14899 1 oracle ssd4 118 32 R 9895936
500 14899 1 oracle ssd6 118 48 R 10027008
500 14899 1 oracle ssd7 118 56 R 10092544
500 14899 1 oracle ssd9 118 72 R 10158080
500 14899 1 oracle ssd0 118 0 R 10354688
500 15033 1 oracle ssd0 118 0 R 10878976
500 15033 1 oracle ssd7 118 56 R 10878976
500 15033 1 oracle ssd4 118 32 R 11862016
500 15033 1 oracle ssd1 118 8 R 12648448
500 15033 1 oracle ssd6 118 48 R 12648448
500 15033 1 oracle ssd9 118 72 R 12845056
500 15033 1 oracle ssd3 118 24 R 13434880
500 15033 1 oracle ssd10 118 80 R 13631488
0 0 0 sched ssd0 118 0 R 34668544
0 0 0 sched ssd10 118 80 R 35586048
0 0 0 sched ssd3 118 24 R 36372480
0 0 0 sched ssd7 118 56 R 37945344
0 0 0 sched ssd9 118 72 R 39124992
0 0 0 sched ssd1 118 8 R 40573440
0 0 0 sched ssd6 118 48 R 41549824
0 0 0 sched ssd4 118 32 R 44236800
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