Error
Error Code: ORA-28604

Oracle Bitmap Index Fragmentation

📦 Oracle Database
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Description

The ORA-28604 error indicates excessive fragmentation within a table, preventing the creation of a bitmap index. This typically occurs when a table contains many deleted rows, leading to sparse data blocks.
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Error Message

ORA-28604: table too fragmented to build bitmap index ( string , string , string )
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Known Causes

3 known causes
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Deleted Rows
Numerous deleted rows leave gaps in data blocks, exceeding the allowed row limit for bitmap index creation.
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Frequent DML Operations
Heavy insert, update, and delete activity on the table leads to fragmentation over time.
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Inappropriate PCTFREE/PCTUSED
Incorrect settings for PCTFREE and PCTUSED can exacerbate fragmentation issues.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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