Informix Error -21529: Defragment: Could not find a large enough extent to cover 2 or more extents.

Reasons / Common Causes

-21529 fires when the defragmenter can't find a single free extent large enough to consolidate two or more existing extents into — per the official guidance.

1. Insufficient free space in the dbspace to consolidate extents, per the official guidance — the direct, only cause.

Solutions / Resolution

1. Add another chunk to the dbspace, or delete some partitions to free space, per the official guidance.

Examples

N/A

No specific triggering statement is documented beyond insufficient free space to consolidate extents.

Diagnostic Checks

1. Check the dbspace's free space, and add a chunk or free space if defragmentation can't find a large-enough consolidation target.

Related Errors / Related Topics

• -21528 — "Defragment: The partition does not require defragmentation." A related defragmentation condition, on the partition not needing the operation at all rather than lacking space to perform it.

Defragmentation couldn't find a large enough free extent to consolidate into — add a chunk or free space in the dbspace.