pasted below is the results of running iostat -x 10 10 (a command to look at disk performance):
avg-cpu: %user %nice %system %iowait %steal %idle
0.32 0.00 0.17 29.31 0.00 70.19
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 4.30 74.03 6.49 387.31 131.87 3678.72 9.68 152.44 385.31 2.54 99.92
sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
sda2 4.30 74.03 6.49 387.31 131.87 3678.72 9.68 152.44 385.31 2.54 99.92
dm-0 0.00 0.00 10.49 458.94 125.47 3671.53 8.09 185.92 394.49 2.13 99.92
dm-1 0.00 0.00 1.30 0.00 10.39 0.00 8.00 0.96 537.85 325.38 42.26
How can i find the reason of such disk I/O usage on a server where i install magento. This was running fine before but last few days site almost goes down. But canot find the reason. Please help