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Oracle Database Is Running Out of Space

Fixing storage exhaustion

Identify Partitioned Tables

Querying partition metadata

Drop Expired Partitions

DBA-only destructive step

Prevent Recurrence

Keeping storage from refilling

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Oracle Database Is Running Out of Space

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Symptoms

The Oracle database or an APM_DATAMART tablespace is approaching its storage limit, datafiles are growing unexpectedly, or GermainUX can no longer insert monitoring data. A common cause is that expired partitions have not been removed according to the configured GermainUX retention policy.

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1. Confirm the Cause

Before deleting anything, determine whether storage is being consumed by: Do not assume that old partitions are the cause until database utilization has been reviewed.

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2. Identify Partitioned Tables

List the partitioned tables available to the current account:
Limit the query to the GermainUX datamart schema when appropriate:

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3. List the Partitions

To inspect the partitions of a specific table:
Replace <TARGET_TABLE_NAME> with the uppercase Oracle table name. Review each partition’s boundary and confirm which dates it contains before considering removal.

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4. Verify the Retention Policy

Before removing a partition, confirm:
  • The applicable GermainUX retention period
  • The partition’s date range
  • Whether the data is still required for reporting, analysis, or compliance
  • Whether aggregated data has been generated
  • Whether a valid backup or snapshot exists
  • Whether dependent indexes or materialized views will be affected
  • Whether the partition is still receiving data
Never remove a partition based only on its name.

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5. Drop Expired Partitions

Only a qualified Oracle DBA should remove partitions. Partition deletion is destructive and may be difficult or impossible to reverse without a valid backup. Use the Oracle-supported ALTER TABLE ... DROP PARTITION procedure appropriate for the installed Oracle version and the table’s partitioning strategy. Do not copy a generic drop command into production without verifying:
  • Schema
  • Table
  • Partition
  • Retention boundary
  • Index-maintenance behavior
  • Backup availability
  • Application impact
Where supported and appropriate, include the required global-index maintenance option to avoid leaving indexes unusable.

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6. Validate After Removal

After removing an expired partition:
1

Confirm that the intended partition was removed

2

Verify the status of affected indexes

3

Confirm that GermainUX continues to insert data

4

Validate representative dashboards and analyses

5

Check materialized-view refresh jobs

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Review tablespace utilization

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Confirm that no required data was removed

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Verify that the automated retention process will handle future partitions

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Prevent Recurrence

To prevent future storage exhaustion:
  • Monitor tablespace utilization.
  • Alert before storage reaches a critical threshold.
  • Review retention jobs regularly.
  • Confirm that expired partitions are removed automatically.
  • Monitor datafile auto-extension and maximum size.
  • Track daily ingestion growth.
  • Reassess storage when monitoring scope or retention increases.
  • Periodically test backup and recovery procedures.
If old partitions are not being removed automatically, contact Germain Software before implementing a recurring manual deletion process.

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Get Help

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The content of this document is proprietary to GERMAIN SOFTWARE.