DBA Archive / Redo Log Rate
Description:
If the database is running in ARCHIVELOG mode, the amount of generated archive log is shown. For databases on NOARCHIVELOG, the approximate amount of generated redo is calculated by the number of log switches per hour and log file size. Note that this log rate is just an approximated maximum as switches could also occur without the log files being full.
Redo log files are located here: select * from sys.v_$logfile
Parameters
Days
Used tables
v$database, dual, gv$instance, gv$archived_log, gv$log_history, gv$log
Categories
Related reports
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 Archive Redo Log Rate 13-Jul-2018 173740.xlsx
Report SQL
www.enginatics.com/reports/dba-archive-redo-log-rate/
Blitz Report™ import options
Executive Summary
The DBA Archive / Redo Log Rate report analyzes the volume of Redo Log generation over time. This metric is a fundamental indicator of database activity and write intensity. It is essential for sizing backup storage, planning network bandwidth for Data Guard (Disaster Recovery), and identifying abnormal spikes in database workload.
Business Challenge
- Capacity Planning: “How much disk space do we need for our archive log destination?”
- DR Bandwidth: “Do we have enough network throughput to replicate changes to the standby site in real-time?”
- Performance Spikes: “Why was the system slow at 10 AM? Was there a massive data load?”
Solution
The report calculates the log generation rate based on historical log switches.
Key Features:
- Archivelog Mode: Uses
GV$ARCHIVED_LOGfor precise volume measurement. - NoArchivelog Mode: Estimates volume based on
GV$LOG_HISTORY(switch frequency) and log file size. - Trend Analysis: Shows the daily or hourly generation rate.
Architecture
The report queries the instance history views.
Key Tables:
GV$ARCHIVED_LOG: History of archived logs.GV$LOG_HISTORY: History of log switches.GV$LOG: Current log configuration.
Impact
- Infrastructure Sizing: Prevents “disk full” outages by accurately forecasting storage needs.
- Disaster Recovery: Ensures the DR strategy is viable by validating network requirements.
- Workload Characterization: Helps DBAs understand the “personality” of the database (write-heavy vs. read-heavy).
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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