High "direct path sync" Waits on Unix Due to Oracle Not Using Direct I/O to Interact with the Filesystem
(Doc ID 1492706.1)
Last updated on NOVEMBER 07, 2023
Applies to:
Oracle Database - Enterprise Edition - Version 11.2.0.1 and laterOracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
- AWR reports "direct path sync" wait events in the Top 5 Wait events
- ASH report indicates the object where it is occurring is a table, for example:
- Describe of table mytab reveals that the table includes a lob column
- Initialization parameter filesystemio_options is not set or set to none.
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| References |