Although it may seem that you should back up online redo logs along with the datafiles and control file, this technique is dangerous. You should not back up online redo logs for the following reasons:* The best method for protecting the online logs a…
Choosing a good InnoDB log file size is key to InnoDB write performance. This can be done by measuring the amount of writes in the redo logs. You can find a detailed explanation in this post. To sum up, here are the main points: The redo logs should…
1.Redo Log The redo log is a disk-based data structure used during crash recovery to correct data written by incomplete transactions. During normal operations, the redo log encodes requests to change table data that result from SQL statements or low-…
http://searchoracle.techtarget.com/answer/Recover-database-using-backup-controlfile-until-cancel What is checked or what happens when we "run recover database using backup controlfile until cancel;"? What does this command do and when do we use…
Recovering After the Loss of Online Redo Log Files If a media failure has affected the online redo logs of a database, then the appropriate recovery procedure depends on the following considerations: The configuration of the online redo log: mirrored…
