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  • File System Corruption on / root partition on Exadata

    File System Corruption on Root (/) Partition of Exadata Storage Server – Oracle Linux 7

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    Osman DİNÇ
    , ,

    A file system corruption issue was detected on the root partition of an Exadata storage server running Oracle Linux 7.9. This was identified by AIDE due to changes in file attributes. Investigations revealed errors in the logs pointing to inode inconsistencies. Attempts to resolve the corruption faced obstacles due to the unavailability of diagnostic ISO images. Ultimately, the file system corruption was fixed by using an Oracle Linux 7.9 installation ISO and running fsck manually.

  • Change Oracle Central Inventory

    How To Change Oracle Central Inventory Location

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    Osman DİNÇ
    ,

    The content discusses the steps of changing the Oracle Central Inventory location for a non-standard installation to ensure consistency before applying Ansible Playbooks for Oracle Database Update. The article explains the role of the Central Inventory, details steps to find the current location, copy directories, update configuration files, and verify the process. It also notes that similar changes on Windows are unsupported.

  • Oracle DST time zone upgrade

    Upgrade Oracle Database Time Zone (DST) version: Key Considerations

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    Osman DİNÇ
    , ,

    The necessity of a time zone upgrade depends on whether a database stores timestamp data with time zones. For organizations with clients in various time zones, upgrading may be essential. The data types TIMESTAMP WITH TIME ZONE (TSTZ) and TIMESTAMP WITH LOCAL TIME ZONE (TSLTZ) are key considerations, with TSTZ retaining original time zone data while TSLTZ normalizes it according to DBTIMEZONE value. Oracle’s Data Pump requires matching time zone versions during data transfers. The steps for upgrading the time zone in a sample database are explained in detail.

  • DBMS_FGA audit_condition

    Column-Level Auditing in Oracle: audit_condition Explained

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    Osman DİNÇ
    , ,

    Unified Auditing mechanism currently in 19c lacks affected rows count reporting and column-level monitoring, presenting challenges in detecting data accesses. Upcoming Oracle Database 23ai will introduce column-level monitoring, allowing focused audits on specific sensitive columns like PAN and SSN. Until then, Fine-Grained Auditing can help track sensitive data at a granular level. Both auditing methods can be effectively used together for comprehensive auditing solutions. Is it possible to audit a specific column for specific users only, and only when rows are returned? I demonstrate how to do this using DBMS_FGA.

  • alter index enable

    ORA-30554 errors on Function-Based Spatial Indexes after Spatial Bundle Patch

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    Osman DİNÇ
    ,

    After applying the Spatial Bundle Patch, ORA-30554 errors may occur on functional indexes that use spatial operators. Functional indexes provide the benefit of spatial indexing but can become disabled after changes to dependent functions. Specific commands are required to re-enable them. This blog post provides details on handling spatial operations, managing indexes, and troubleshooting issues that arise after updates.

  • Internal flashback query fails

    ORA-00942 Errors from Wnnn Slave Processes working on Behalf of FBDA: Solutions Provided

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    by

    Osman DİNÇ
    , ,

    This post discusses troubleshooting ORA-00942 errors from Wnnn Processes working on Behalf of FBDA (Flashback Data Archive) process. By enabling error tracing, numerous ORA-00942 entries appeared in the alert log. The focus is on the relationship between Wnnn slave processes and Flashback Data Archive management, highlighting that untriggered archive history table creation leads to parsing failures. The absence of SYS_FBA_* tables due to lack of DML operations led to failed parsing attempts by FBDA, adversely affecting performance metrics. Two solutions are suggested: reconsidering Flashback Data Archive necessity for these tables or triggering the creation of SYS_FBA_* tables through minor modifications.