Home > Ask the Oracle Database / Applications Experts > Oracle database design and architecture Questions & Answers > Guessing whether tablespace has sufficient space
Ask The Oracle Expert: Questions & Answers
EMAIL THIS

Guessing whether tablespace has sufficient space

Brian Peasland EXPERT RESPONSE FROM: Brian Peasland

Pose a Question
Other Oracle Categories
Meet all Oracle Experts
Become an Expert for this site


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us   


>
QUESTION POSED ON: 27 September 2002
We perform a load of several million records a day in a Oracle 9i database. We can roughly estimate the total size the load will take in the database, in bytes. But before we go ahead with loading the records using SQL*Loader, we need to be able to state whether the tablespace has sufficient number of free extents to accomodate the load. In Uniform Size extents, we can know this for sure. But with Autoallocated extents, the sizes of extents are unpredictable. Using the data dictionary views or some other technique, is it possible to guess whether the tablespace has sufficient space? Can you suggest a way of checking this?

>

When your LMT is AUTOALLOCATE, then Oracle will allocate extent sizes of 64K, 1MB and 8MB. The next extent will be equal to, or larger than the largest extent already allocated. For instance, suppose your table has allocated sixteen 64K extents and two 1MB extents. The next extent allocated will not be 64K. It will be 1MB. After fourteen more 1MB extents have been allocated, 8MB extents will be allocated.

So you will need to check that your tablespace has sufficient 1MB extents or 8MB extents available in free space.

For More Information


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us   



RELATED CONTENT
Oracle database design and architecture
Why am I receiving Oracle memory allocation errors?
How to join two tables with unique keys in Oracle
How does the Oracle LGWR write to online redo log files?
Can I check an Oracle instance without logging into the Oracle server?
How to use V$SEGMENT_STATISTICS to find the most accessed Oracle table
Can I install an Oracle client on Windows 7?
How to use the Oracle Database Upgrade Assistant (DBUA)
Can I specify Oracle column order in my database table?
Can I have a single Oracle 11g RAC instance across multiple databases?
How to use the Oracle export utility to duplicate database structure

Oracle database design and architecture
Why am I receiving Oracle memory allocation errors?
How to join two tables with unique keys in Oracle
Can I check an Oracle instance without logging into the Oracle server?
How does the Oracle LGWR write to online redo log files?
How to determine your SQL database through needs analysis
Breaking down the contenders in the SQL database market
The MySQL open source database in the enterprise
Diving deeper into the SQL database features
What managers should consider when starting a database scaling project
How to use V$SEGMENT_STATISTICS to find the most accessed Oracle table

RELATED GLOSSARY TERMS
Terms from Whatis.com − the technology online dictionary
E. F. Codd  (SearchOracle.com)
extent  (SearchOracle.com)
flexfield  (SearchOracle.com)
foreign key  (SearchOracle.com)
multidimensional database  (SearchOracle.com)
object-oriented database management system  (SearchOracle.com)
quad tree  (SearchOracle.com)
relational online analytical processing  (SearchOracle.com)
row  (SearchOracle.com)
splay tree  (SearchOracle.com)

RELATED RESOURCES
2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems
Search Bitpipe.com for the latest white papers and business webcasts
Whatis.com, the online computer dictionary



Search and Browse the Expert Answer Center
Search and browse more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.
Browse our Expert Advice



Oracle White Papers: Fusion Middleware
HomeNewsTopicsTipsAsk the ExpertsMultimediaWhite PapersProductsBlogs
About Us  |  Contact Us  |  For Advertisers  |  For Business Partners  |  Site Index  |  RSS
SEARCH 
TechTarget provides technology professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective purchase decisions and managing their organizations' technology projects - with its network of technology-specific websites, events and online magazines.

TechTarget Corporate Web Site  |  Media Kits  |  Site Map




All Rights Reserved, Copyright 2003 - 2009, TechTarget | Read our Privacy Policy
  TechTarget - The IT Media ROI Experts