Disk contention occurs when multiple processes try to access the same physical disk simultaneously. Disk contention can be reduced, thereby increasing performance, by distributing the disk I/O more evenly over the available disks.
![](https://learning.oreilly.com/library/view/oracle-database-12c/9781259589690/e0100-01.jpg)
A large difference in the number of physical writes and reads between disks may indicate that a disk is being overburdened.
![](https://learning.oreilly.com/library/view/oracle-database-12c/9781259589690/e0100-01.jpg)
A large difference in the number of physical writes and reads between disks may indicate that a disk is being overburdened.
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