In Oracle Database, a redo log thread refers to a specific instance of redo log processing within the database. Redo logs are crucial components of a database system, responsible for recording changes made to data (such as inserts, updates, and deletes) in a sequential manner. These changes are logged in redo log files to ensure … Read more
Scenario 1: If the jobs are running too frequently, it is possible the queries are not releasing the lock and resulting in the error: “ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired”. DDL statements must obtain the library cache lock in order to perform DDL, so an explicit DDL lock timeout should … Read more
A full table scan reads all rows from a table, and then filters out those rows that do not meet the selection criteria. Just because during accessing large number of blocks with FTS Oracle can use multiblock I/O read call, FTS is sometimes better than index range scans. Reason Explanation No index exists. If no … Read more
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Computer memory is managed in blocks of storage known as pages, which have a predetermined size that depends on the computer’s architecture. These pages are organized using a page table, which is a data structure that links virtual memory addresses to their physical location in memory. As companies store more and more information in their … Read more