Progress
Database Administration
Guide and Reference


Disk I/O

Because reading and writing data to disk is a relatively slow operation, disk I/O is a common database performance bottleneck. The Progress database engine performs three primary types of I/O operations:

If performance monitoring indicates that I/O resources are overloaded, try the techniques in the following sections to better balance disk I/O.

The best way to reduce disk I/O bottlenecks is to spread I/O across several physical disks, allowing multiple disk accesses to occur concurrently. You can extend files across many disk volumes or file systems.

NOTE: For a complete description of storage areas, see The Progress Database."


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