DBA Segments
Description:
Database segments such as tables, indexes, lob segments by size and total database size summary
Parameters
Segment Name like, Segment Type, Table Name, Tablespace Name, Owner, Size bigger than x MB, Group by
Used tables
dba_segments, dba_indexes, dba_lobs, dba_secondary_objects
Categories
Related reports
DBA Index Columns, DBA Objects, DBA SGA Buffer Cache Object Usage
Dependencies
If you would like to try one of these Oracle EBS SQLs without having Blitz Report installed, note that some of the reports require functions from utility package xxen_util.
Example Report
DBA Segments 22-Dec-2025 084642.xlsx
Report SQL
www.enginatics.com/reports/dba-segments/
Blitz Report™ import options
Case Study & Technical Analysis
Abstract
The DBA Segments report is a fundamental storage analysis tool used to visualize space consumption within the Oracle database. It aggregates data at the segment level—covering tables, indexes, LOBs, and partitions—to identify the largest objects and their growth patterns. This analysis is critical for capacity planning, reclaiming wasted space, and managing tablespace quotas.
Technical Analysis
Core Components
- Segment Classification: Categorizes storage by type (TABLE, INDEX, LOBSEGMENT, TABLE PARTITION, etc.).
- Size Metrics: Reports physical space allocated (bytes/blocks) versus actual space used, helping to identify fragmentation or “high water mark” issues.
- Ownership & Location: Maps segments to their owners (schemas) and tablespaces.
Key Views
DBA_SEGMENTS: The primary source for storage allocation data.DBA_INDEXES: Used to correlate index segments with their parent tables.DBA_LOBS: Links LOB segments (which often have system-generated names) back to their parent table and column.DBA_SECONDARY_OBJECTS: Handles secondary objects like domain indexes.
Operational Use Cases
- Top N Analysis: Identifying the top 10 or 20 largest objects in the database to focus tuning or archiving efforts.
- Growth Monitoring: Tracking segment size changes over time to forecast storage requirements.
- Cleanup: Finding temporary or “backup” tables (e.g.,
EMP_BKP_2023) that are consuming space unnecessarily. - LOB Management: Specifically analyzing Large Object storage, which can often grow uncontrollably if not monitored.
Oracle E-Business Suite Reporting Library
We provide an open source Oracle EBS SQLs as a part of operational and project implementation support toolkits for rapid Excel reports generation.
Blitz Report™ is based on Oracle EBS forms technology, and hence requires minimal training. There are no data or performance limitations since the output files are created directly from the database without going through intermediate file formats such as XML.
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The Filters, Columns, Rows and Values fields are used to create and deliver the data in pivot table format with full drill down to details.

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