Maximum Datafile Size In an Oracle Database

March 7, 2009Gokhan Atil1 CommentOracledatafile, maximum

Each Oracle datafile can contain maximum 4194303 (4 Million) data blocks. So maximum file size is 4194303 multiplied by the database block size.

Block Size | Maximum Datafile Size
———————————————
2k 4194303 * 2k = 8 GB
4k 4194303 * 4k = 16 GB
8k 4194303 * 8k = 32 GB
16k 4194303 * 16k = 64 GB
32k 4194303 * 32k = 128 GB

In Oracle Database 10g, BIGFILE tablespace was introduced. The BIGFILE tablespace can ONLY have a single datafile, but this datafile can contain maximum 4294967295 (4 billion) data blocks.

Block Size | Maximum Datafile Size
———————————————
2k 4294967295 * 2k = 8 TB
4k 4294967295 * 4k = 16 TB
8k 4294967295 * 8k = 32 TB
16k 4294967295 * 16k = 64 TB
32k 4294967295 * 32k = 128 TB

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Gokhan Atil

AWS Big Data Specialist. Oracle Certified Professional (OCP) for EBS R12, Oracle 10g and 11g. Co-author of "Expert Oracle Enterprise Manager 12c" book published by Apress. Awarded as Oracle ACE (in 2011) and Oracle ACE Director (in 2016) for the continuous contributions to the Oracle users community. Founding member, and vice president of Turkish Oracle User Group (TROUG). Presented at various international conferences including Oracle Open World.