Informix Error -21528: Defragment: The partition does not require defragmentation.

Reasons / Common Causes

-21528 fires when a defragmentation is requested on a partition that doesn't need it — per the official guidance.

1. The partition already being sufficiently unfragmented, per the official guidance — the direct, only cause.

Solutions / Resolution

1. No action is required, per the official guidance.

Examples

N/A

No specific triggering statement is documented beyond requesting defragmentation on an already-unfragmented partition.

Diagnostic Checks

1. No diagnostic action is needed — this is an informational condition, not a fault.

Related Errors / Related Topics

• -21529 — "Defragment: Could not find a large enough extent to cover 2 or more extents." A related defragmentation condition, on insufficient free space rather than the partition simply not needing defragmentation.
• -21533 — "Defragment: A defragmentation task is already in progress on this dbspace." A related defragmentation restriction, on a concurrent task rather than fragmentation level.

The partition doesn't require defragmentation — no action needed.