Direct I/O (-directio)
- Last Updated: December 1, 2025
- 1 minute read
- OpenEdge
- Version 12.8
- Documentation
Direct I/O (-directio)
| Operating system and syntax | UNIX / Windows |
|
||
|---|---|---|---|---|
| Use with | Maximum value | Minimum value | Single-user default | Multi-user default |
| CC, DBS | – | – | Not enabled | Not enabled |
Use Direct I/O (-directio)
to open all files in unbuffered mode, which enables the OpenEdge RDBMS
to use an I/O technique that bypasses the operating system buffer
pool and transfers data directly from a buffer to disk. This technique
avoids the overhead of maintaining the operating system buffer pool
and eliminates competition for operating system buffers between OpenEdge programs
and other programs.
Note: Use asynchronous page writers (APWs). They improve
database performance by performing overhead operations in the background.