HOT DISKS TRYING TO LOOK COOOOOL Have you ever noticed a system where the users are reporting slow response times, but topas -D (or pressing D from within the topas main screen) shows the Disk Busy is constantly 0.0%, even on disks with high I/O? Suspicious, isn't it? Let's try iostat -d:
System configuration: lcpu=4 drives=7 paths=14 vdisks=2
" Disk history since boot not available. "
Aha! What's going on? The iostat command documentation explains Disk Input/Output History To
improve performance,... [More]