Solved

Redo log rotation frequency

Posted on 2007-03-29
3
814 Views
Last Modified: 2013-12-19
I've read redo logs should rotate every 20 - 30 mins.   Is there a problem if the rotation is even more infrequent say 50 - 60 mins?
0
Comment
Question by:xoxomos
  • 2
3 Comments
 
LVL 7

Accepted Solution

by:
gattu007 earned 250 total points
ID: 18823408
That is not a problem but only thing your recovery may go up...

0
 
LVL 7

Expert Comment

by:gattu007
ID: 18823462
The size of the redo log files can influence performance, because the behavior of
the database writer and archiver processes depend on the redo log sizes.
Generally, larger redo log files provide better performance, however
it must balanced out with the expected recovery time.Undersized log files
increase checkpoint activity and increase CPU usage.

Checkpoint frequency is affected by several factors, including log file size and
the setting of the FAST_START_MTTR_TARGET initialization parameter.
If the FAST_START_MTTR_TARGET parameter is set to limit the instance recovery time,
Oracle automatically tries to checkpoint as frequently as necessary.
Under this condition, the size of the log files should be large enough to avoid
additional checkpointing due to under sized log files.

You can find more info metalink        REDO LOGS SIZING ADVISORY
        Doc ID:       Note:274264.1
0
 

Author Comment

by:xoxomos
ID: 18837354
Thanks
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Join & Write a Comment

Suggested Solutions

Introduction A previously published article on Experts Exchange ("Joins in Oracle", http://www.experts-exchange.com/Database/Oracle/A_8249-Joins-in-Oracle.html) makes a statement about "Oracle proprietary" joins and mixes the join syntax with gen…
Configuring and using Oracle Database Gateway for ODBC Introduction First, a brief summary of what a Database Gateway is.  A Gateway is a set of driver agents and configurations that allow an Oracle database to communicate with other platforms…
Via a live example, show how to take different types of Oracle backups using RMAN.
Via a live example, show how to restore a database from backup after a simulated disk failure using RMAN.

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now