Q

Redo log buffer and buffer cache sizing

I want to change my redo log buffer or database buffer cache size. Kindly tell me what the algorithm is to change...

the size.

For the redo log buffer, if your database is experiencing a high degree of waits for space in the log buffer, consider increasing the size, but remember that it is almost never necessary for the size of a redo log buffer to exceed several hundred kilobytes.

For the buffer cache, make use of the buffer cache sizing advice embodied in the V$DB_CACHE_ADVICE data dictionary table, either via your own queries or the Enterprise Manager interface to this information. Each row in this view shows the estimated I/O activity for a given cache size; you can thus see how much more (or less) disk reads would be required for various cache sizes.

This was last published in May 2004

Dig Deeper on Oracle database performance problems and tuning

PRO+

Content

Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

SearchDataManagement

SearchBusinessAnalytics

SearchSAP

SearchSQLServer

TheServerSide

SearchDataCenter

SearchContentManagement

SearchFinancialApplications

Close