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Wadhah DAOUEHI
Wadhah DAOUEHI
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Author Archives: Wadhah DAOUEHI

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Oracle ODA X9 (19c): Resize DB Home Storage

By Wadhah DAOUEHI | June 13, 2026 - 3:01 pm |July 11, 2026 Linux, ODA 19c, RAC 19c
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A good news, starting from Oracle Database Appliance ODA 19.6, the Oracle Database Home (DB … Read More →

Oracle Database 19c: How to Verify Locked and Expired User Accounts

By Wadhah DAOUEHI | June 8, 2026 - 3:07 pm |June 9, 2026 Oracle 19c, Oracle Database
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In Oracle Database 19c managing user accounts is very important for database security. Checking how … Read More →

Oracle Database 19c: How to Verify DBA Accounts and Audit DBA Roles

By Wadhah DAOUEHI | June 6, 2026 - 2:03 pm |June 9, 2026 Oracle 19c, Oracle Database
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When you are using Oracle Database 19c in a company the people with DBA accounts … Read More →

Oracle 19c – SQL Access Path: Index Fast Full Scan

By Wadhah DAOUEHI | February 8, 2026 - 7:06 pm |May 31, 2026 Oracle 19c, Oracle Database
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In Oracle Database 19c, the Cost-Based Optimizer (CBO) determines the most efficient method to retrieve … Read More →

Oracle ASM : Monitor Disk Group Space Usage in 19c

By Wadhah DAOUEHI | January 25, 2026 - 2:37 pm |May 31, 2026 Oracle 19c, Oracle Database
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In Oracle 19c environments using ASM (Automatic Storage Management), monitoring disk group space is critical … Read More →

Hourly Redo Activity Analysis Using V$LOG_HISTORY

By Wadhah DAOUEHI | January 11, 2026 - 2:18 pm |May 31, 2026 Oracle 19c, Oracle Database
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Understanding redo generation patterns is essential for Oracle performance monitoring, backup planning, and Data Guard … Read More →

Identify Where Database Time Is Spent (Wait Events + CPU)

By Wadhah DAOUEHI | December 21, 2025 - 2:02 pm |May 31, 2026 Oracle 19c, Oracle Database
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One of the most important tasks for an Oracle DBA is understanding where database time … Read More →

Calculate Real Table Size (Including Indexes, LOBs and LOB indexes)

By Wadhah DAOUEHI | November 30, 2025 - 1:44 pm |May 31, 2026 Oracle Database, SQL
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In Oracle database (starting from 10g), a table’s real storage size is not limited to … Read More →

Oracle 19c: Index-Organized Table (IOT)

By Wadhah DAOUEHI | November 9, 2025 - 7:05 pm |March 9, 2026 Oracle 19c, Oracle Database
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In Oracle Database 19c, tables are typically stored as heap-organized tables, where data rows are … Read More →

Oracle 19c – SQL Access Path: Index Skip Scan

By Wadhah DAOUEHI | November 1, 2025 - 6:44 pm |March 9, 2026 Oracle 19c, Oracle Database, SQL
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In Oracle Database 19c, the Cost-Based Optimizer (CBO) selects the best method to retrieve rows … Read More →

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