Exadata Bigfile Tablespaces

Posted: January 30, 2015 in Uncategorized
Tags:

Good afternoon, Oracle fans!

This week, I inherited a newly created database system on an Exadata 1/4 Rack. Not only is this my first time running with Exadata but it is also the first time I have worked with Bigfile Tablespaces. There are a couple of upfront differences between Bigfile Tablespaces and normal tablespaces.

  1. Bigfile Tablespaces are created with one and only one datafile. You are not permitted to add datafiles. If your Bigfile Tablespace gets full, you can only extend it.
  2. When you set a Bigfile Tablespace to autoextend max size unlimited, it is really unlimited. Okay, it is limited to 32 TB. I am used to the standard tablespace which is limited to 32GB when you set it to autoextend max size unlimited. This will be revealed when running Exachk…

Fail message:    Some bigfile tablespaces do not have non-default maxbytes values set     

I am not completely sure why this is considered a failure. It may take years before this becomes a problem. Nevertheless, it’s an easy fix. Determine your maxsize and alter your datafiles set to maxsize unlimited.

alter database datafile '+DATA/some/file/data.dbf' autoextend on maxsize 3T';

 

Thanks for reading! Only two weeks until RMOUG!!

Jason

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s