Turn on IO monitoring:
sysctl vm.block_dump=1# or echo 1 >/proc/sys/vm/block_dump
The kernel will dump IO read and write to the diary after booting , use dmesg to view:
dmesg
process read and write block to disk dm-0:
mysqld(7822): READ block 78196624 on dm-0kjournald(529): WRITE block 211136 on dm-0bash(8336): dirtied inode 7391146 (dmesg) on dm-0
Statistically the top 10 processes currently occupying IO:
dmesg
1 Start vSphere Client2 Start Virtual Machine [Right-click on VM, select Power —>Open] and
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