{"id":4991,"date":"2025-11-28T23:51:19","date_gmt":"2025-11-28T23:51:19","guid":{"rendered":"https:\/\/w3buddy.com\/?p=4991"},"modified":"2026-01-20T10:14:02","modified_gmt":"2026-01-20T04:44:02","slug":"how-to-create-manage-oracle-bigfile-tablespaces","status":"publish","type":"post","link":"https:\/\/w3buddy.com\/blog\/how-to-create-manage-oracle-bigfile-tablespaces\/","title":{"rendered":"How to Create & Manage Oracle Bigfile Tablespaces"},"content":{"rendered":"\n

Bigfile tablespaces are commonly used in modern Oracle environments where large storage volumes, ASM, and Oracle Managed Files (OMF) are standard. They simplify tablespace administration by using a single large datafile<\/strong> instead of multiple small ones.<\/p>\n\n\n\n

This guide explains Bigfile tablespaces and provides all essential DBA commands in one SQL block with SQL*Plus formatting.<\/p>\n\n\n\n

What Is a Bigfile Tablespace?<\/strong><\/h1>\n\n\n\n

A Bigfile Tablespace (BFT)<\/strong> is a special Oracle tablespace that contains exactly one datafile<\/strong> (or one tempfile for temporary tablespaces).
However, that file can grow extremely large\u2014up to multiple terabytes depending on the block size.<\/p>\n\n\n\n

Key Characteristics<\/h3>\n\n\n\n
    \n
  • One datafile per tablespace<\/li>\n\n\n\n
  • Supports very large file sizes<\/li>\n\n\n\n
  • Simplifies storage administration<\/li>\n\n\n\n
  • Works best with ASM \/ OMF<\/li>\n\n\n\n
  • Fully supports autoextend and online resize<\/li>\n\n\n\n
  • Convertible to\/from smallfile tablespaces<\/li>\n<\/ul>\n\n\n\n

    When to Use Bigfile Tablespaces<\/h3>\n\n\n\n

    Use Bigfile tablespaces when:<\/p>\n\n\n\n

      \n
    • Your environment uses ASM or OMF<\/li>\n\n\n\n
    • You manage very large schemas\/databases<\/li>\n\n\n\n
    • You want simpler tablespace\/file management<\/li>\n<\/ul>\n\n\n\n

      Avoid them if:<\/p>\n\n\n\n

        \n
      • Your filesystem cannot support very large files<\/li>\n\n\n\n
      • Your environment requires multiple datafiles per tablespace<\/li>\n<\/ul>\n\n\n\n

        All Bigfile Tablespace Commands<\/strong><\/h1>\n\n\n\n
        --------------------------------------------------------------------------------\n-- SQL*Plus Output Formatting\n--------------------------------------------------------------------------------\nSET LINES 200;\nCOL TABLESPACE_NAME FORMAT A25;\nCOL FILE_NAME       FORMAT A60;\nCOL BIGFILE         FORMAT A8;\nCOL STATUS          FORMAT A15;\nCOL MB              FORMAT 999,999,999;\n\n--------------------------------------------------------------------------------\n-- 1. Create a Bigfile Tablespace (Manual File Path)\n--------------------------------------------------------------------------------\nCREATE BIGFILE TABLESPACE big_tbs\nDATAFILE '\/opt\/oradata\/BIG_TBS01.dbf'\nSIZE 500M\nAUTOEXTEND ON NEXT 100M MAXSIZE 20G;\n\n--------------------------------------------------------------------------------\n-- 2. Create Bigfile Tablespace Using OMF (Recommended for ASM\/OMF)\n--------------------------------------------------------------------------------\nCREATE BIGFILE TABLESPACE big_tbs_omf\nDATAFILE SIZE 1G AUTOEXTEND ON NEXT 200M MAXSIZE UNLIMITED;\n\n--------------------------------------------------------------------------------\n-- 3. Check If a Tablespace Is Bigfile or Smallfile\n--------------------------------------------------------------------------------\nSELECT TABLESPACE_NAME, BIGFILE\nFROM DBA_TABLESPACES\nORDER BY TABLESPACE_NAME;\n\n--------------------------------------------------------------------------------\n-- 4. Check Datafile of a Bigfile Tablespace\n--------------------------------------------------------------------------------\nSELECT FILE_NAME,\n       BYTES\/1024\/1024 AS MB\nFROM DBA_DATA_FILES\nWHERE TABLESPACE_NAME = 'BIG_TBS';\n\n--------------------------------------------------------------------------------\n-- 5. Resize Bigfile Datafile\n--------------------------------------------------------------------------------\nALTER DATABASE DATAFILE '\/opt\/oradata\/BIG_TBS01.dbf'\nRESIZE 5G;\n\n--------------------------------------------------------------------------------\n-- 6. Enable or Modify Autoextend on Bigfile\n--------------------------------------------------------------------------------\nALTER DATABASE DATAFILE '\/opt\/oradata\/BIG_TBS01.dbf'\nAUTOEXTEND ON NEXT 500M MAXSIZE 50G;\n\n--------------------------------------------------------------------------------\n-- 7. Rename a Bigfile Tablespace\n--------------------------------------------------------------------------------\nALTER TABLESPACE big_tbs RENAME TO big_tbs_new;\n\n--------------------------------------------------------------------------------\n-- 8. Make a Bigfile Tablespace READ ONLY \/ READ WRITE\n--------------------------------------------------------------------------------\nALTER TABLESPACE big_tbs_new READ ONLY;\nALTER TABLESPACE big_tbs_new READ WRITE;\n\n--------------------------------------------------------------------------------\n-- 9. Drop a Bigfile Tablespace (With or Without Datafiles)\n--------------------------------------------------------------------------------\n-- Drop tablespace but keep physical datafile\nDROP TABLESPACE big_tbs_new;\n\n-- Drop tablespace and delete its datafile\nDROP TABLESPACE big_tbs_new INCLUDING CONTENTS AND DATAFILES;\n\n--------------------------------------------------------------------------------\n-- 10. Convert a Smallfile Tablespace to Bigfile (12c+)\n--------------------------------------------------------------------------------\nALTER TABLESPACE small_tbs CONVERT TO BIGFILE;\n\n--------------------------------------------------------------------------------\n-- 11. Convert Bigfile to Smallfile\n--------------------------------------------------------------------------------\nALTER TABLESPACE big_tbs_omf CONVERT TO SMALLFILE;\n\n--------------------------------------------------------------------------------\n-- 12. Create a Bigfile Temporary Tablespace\n--------------------------------------------------------------------------------\nCREATE BIGFILE TEMPORARY TABLESPACE big_temp\nTEMPFILE '\/opt\/oradata\/BIG_TEMP01.dbf'\nSIZE 1G AUTOEXTEND ON NEXT 500M;\n\n--------------------------------------------------------------------------------\n-- 13. Set Bigfile Tablespace as Default for New Users\n--------------------------------------------------------------------------------\nALTER DATABASE DEFAULT TABLESPACE big_tbs;\n\n--------------------------------------------------------------------------------\n-- 14. Check Block Size & Bigfile Support\n--------------------------------------------------------------------------------\nSELECT TABLESPACE_NAME, BLOCK_SIZE, BIGFILE\nFROM DBA_TABLESPACES;\n--------------------------------------------------------------------------------<\/code><\/pre>\n\n\n\n
        Summary<\/strong><\/h1>\n\n\n\n
        Bigfile tablespaces simplify the management of large Oracle databases by consolidating storage into a single, large datafile per tablespace. They are ideal for ASM, OMF, large OLTP systems, and data warehouses.
        The command block above gives DBAs everything they need to create, manage, convert, resize, monitor, and drop Bigfile tablespaces efficiently.<\/p>\n","protected":false},"excerpt":{"rendered":"
        Bigfile tablespaces are commonly used in modern Oracle environments where large storage volumes, ASM, and Oracle Managed Files (OMF) are standard. They simplify tablespace administration by using a single large datafile instead of multiple small ones. This guide explains Bigfile tablespaces and provides all essential DBA commands in one SQL block with SQL*Plus formatting. What […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAowu461DA:productID":"","footnotes":""},"categories":[1225],"tags":[],"class_list":["post-4991","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/posts\/4991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/comments?post=4991"}],"version-history":[{"count":1,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/posts\/4991\/revisions"}],"predecessor-version":[{"id":4992,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/posts\/4991\/revisions\/4992"}],"wp:attachment":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/media?parent=4991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/categories?post=4991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/tags?post=4991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}