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When Oracle cannot write an archived redo log because its destination is full or unavailable, it reports an archiver error. If the problem is not resolved, Oracle warns that transaction execution can stop; a disk-full archiving failure can also leave a database unresponsive. The exact impact depends on which destination failed and how it is configured.
What happens when Oracle cannot archive redo?
Oracle’s error reference labels OCI-00257: “Archiver error. Connect AS SYSDBA only until resolved.” It warns: “If the problem is not resolved soon, the database will stop executing transactions.” The warning describes a potential availability incident, not a fixed countdown: Oracle does not give a universal time before transactions stop.
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Oracle administration guidance also warns that a disk-full error during archiving can cause a fatal error and make the database stop responding. The documented behavior may vary by release and configuration, so do not assume every archiver failure produces identical symptoms.
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Oracle must be able to write archived redo to its configured destination. A full destination device is a likely cause of OCI-00257; a failed destination configured as MANDATORY can also be involved. A destination might be a local path, an ASM disk group, the Fast Recovery Area (FRA), or a remote service.
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| Situation | What it means |
|---|---|
| FRA full or unavailable | Oracle Cloud Base Database troubleshooting documents a full FRA as one cause of a stuck archiver and backup failures. This is one scenario, not the explanation for every archiver error. |
| Another archive destination full or unavailable | A different destination device can prevent archiving; a failed MANDATORY destination is another possible cause. |
| Destination reports FULL or ERROR | The status identifies a destination problem, but alert logs and trace files are needed to investigate the underlying storage or destination error. |
How to diagnose the failure
- Read the alert log and trace files. Find the complete error stack and the underlying operating-system, storage, or destination message. Oracle specifically directs administrators to inspect these records.
- Check destination status and binding. Query
V$ARCHIVE_DESTfor destination status, including FULL or ERROR, and its binding, such as MANDATORY or OPTIONAL. Use those results to identify which configured destination is affected. - Identify the destination resource. Determine whether the failing target is a local path, ASM disk group, FRA, or remote service, and check its availability and capacity.
- Check recovery and standby dependencies. Before freeing space, changing a destination, or deferring it, establish whether archived logs are needed for retention, backup, recovery, or Data Guard operations.
How to restore archiving safely
Resolve the underlying capacity or availability problem while preserving the logs and destinations your recovery and standby arrangements require. The appropriate remedy depends on what failed; there is no universally safe archive-log deletion recipe. Do not treat manual deletion as a general fix.
For a full-FRA or stuck-archiver incident, Oracle’s cloud troubleshooting guidance directs administrators to resolve the underlying full or unavailable resource and then confirm the instance status. After restoring the destination, verify that archiving has resumed and that dependent backup or standby operations are healthy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why MANDATORY and OPTIONAL settings matter
V$ARCHIVE_DEST reports whether a destination is MANDATORY or OPTIONAL. Oracle documents that a failed MANDATORY destination configured with REOPEN can stall production when archiving cannot succeed. OPTIONAL destinations behave differently, but changing a required destination’s status can affect recoverability or standby protection.
For a failing MANDATORY destination, Oracle documents several administrator options:
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- Manually archive to the failed destination.
- Change the destination, including deferring it or making it optional.
- Drop the destination.
These are operational choices with different availability and recovery consequences, not interchangeable quick fixes. Oracle Database 26ai documentation gives REOPEN a default of 300 seconds; this is a configuration value, not a promise that recovery will take that long.
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Sources and version scope
- Oracle Database Error Messages: OCI-00257 lists 26ai, 21c, and 19c and was updated July 19, 2026.
- Oracle Database 26ai reference for V$ARCHIVE_DEST.
- Oracle Database 26ai redo transport guidance.
- Oracle Database 26ai REOPEN guidance.
- Oracle Database 12.1 archived redo-log administration guidance documents the disk-full stop-responding warning.
- Oracle Cloud Base Database backup troubleshooting covers the full-FRA and stuck-archiver scenario.
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