Columnar Formats in Exadata Flash Cache

With the introduction of Oracle Database 12c Release 2 it is now possible to take advantage of the Database In-Memory columnar format, and all of its ground-breaking scan performance, in the Exadata flash cache. Unfortunately there isn't much documentation on this feature (see Section 7.9 Enabling or Disabling In-Memory Columnar Caching on Storage Servers in the Oracle Exadata System Software User's Guide). The following is a description of the different columnar formats...

Monday, October 30, 2017 | Read More

OOW 2017 - It's a wrap!

The Database In-Memory team would like to thank everyone for attending the In-Memory sessions and Hands On Labs. The response was great and we were able to meet lots of new friends and re-connect with old ones. I was asked about the HOL lab guide and it is now available in the OOW Session Catalog so you can download it directly from there: Other presentations are also available in their respective schedule listings.  

Friday, October 6, 2017 | Read More

What's New in 12.2: In-Memory Expressions, Part 3

In our previous two posts on In-Memory Expressions (IM expressions) we discussed the two types of IM expressions, user-defined In-Memory virtual columns and automatically detected In-Memory expressions. Now let's visit some of the details of IM expressions. Probably the first thing to note is that since IM expressions are stored in the IM column store, their use is going to require more memory to store the IM expressions. We can see this when we populate IM expressions. In Pa...

Thursday, September 28, 2017 | Read More

Oracle Open World 2017 - It's that time again!

It's almost time for Oracle Open World again. Open World starts on Sunday October 1 and runs through Thursday October 5th. There will be lots of Database In-Memory sessions, hands-on-labs and we will be in the Oracle demo grounds and Engineered Systems showcase as well. Here is a list of sessions to help with your planning. Oracle Presentations: HOL7584 - Oracle Database In-Memory Hands-on Lab Monday, Oct 02, 6:00 p.m. - 7:00 p.m. | Hilton San Francisco Union Square (Lobby...

Thursday, September 14, 2017 | Read More

What's New in 12.2: In-Memory Expressions, Part 2

In our previous post on In-Memory Expressions (IM expressions) we described what an IM expression is and showed the potential for additional high-performance acceleration using the feature. We said that there are two types of IM expressions, user-defined IM virtual columns and automatically detected IM expressions which are stored as hidden virtual columns. This post will focus on automatically detected IM expressions and how they work. In Oracle Database 12c Release 2 (12.2)...

Tuesday, August 29, 2017 | Read More

New Database In-Memory Implementation and Usage White Paper

A new Database In-Memory Implementation and Usage White Paper is now available. This complements the Database In-Memory Technical White Paper and provides specific information to help you implement and use Database In-Memory.  

Thursday, August 24, 2017 | Read More
 

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