DBA AWR Tablespace Usage
Description:
Tablespace usage over time from the AWR
Parameters
Date From, Diagnostic Pack enabled, Container Data
Used tables
v$parameter, v$database, dba_hist_tbspc_space_usage, ts$
Categories
Related reports
DBA SGA+PGA Memory Configuration
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 AWR Tablespace Usage 18-Jan-2018 223607.xlsx
Report SQL
www.enginatics.com/reports/dba-awr-tablespace-usage/
Blitz Report™ import options
Executive Summary
The DBA AWR Tablespace Usage report tracks the historical growth of database storage. Unlike real-time checks that only show current usage, this report uses AWR history to show trends. This is essential for capacity planning, allowing DBAs to predict when a tablespace will fill up based on its growth rate over the last month or year.
Business Challenge
- Capacity Planning: “When will we need to buy more disk storage?”
- Budgeting: “How much storage did the ‘Archive’ tablespace consume last year?”
- Anomaly Detection: “Why did the UNDO tablespace suddenly grow by 50GB yesterday?”
Solution
This report displays the used size of tablespaces over time.
Key Features:
- Used Space: The amount of space actually occupied by data.
- Allocated Space: The size of the datafiles.
- Growth Trend: By comparing snapshots, you can calculate the daily growth rate.
Architecture
The report queries DBA_HIST_TBSPC_SPACE_USAGE.
Key Tables:
DBA_HIST_TBSPC_SPACE_USAGE: Historical tablespace usage metrics.TS$: Tablespace metadata.
Impact
- Uptime: Prevents outages caused by tablespaces reaching 100% capacity.
- Cost Control: Helps justify storage purchases and identify wasted space.
- Proactive Management: Allows DBAs to add space during maintenance windows rather than in a panic during business hours.
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