Indexing is a cornerstone of database performance tuning, particularly in Oracle. While a basic B-tree index cansignificantly speed up queries, Oracle offers a rich variety of indexing techniques suited for different usecases—whether you’re optimizing an OLTP application or a data warehouse.In this article, we’ll explore several Oracle index types and . . . Read more
Key Oracle Memory Structures ��️ Memory Management Modes in Oracle Manual PGA Memory Management – Uses SORT_AREA_SIZE, HASH_AREA_SIZE, etc.;discouraged.⚙️ Memory Tuning Parameters MEMORY_TARGET, SGA_TARGET, PGA_AGGREGATE_TARGET – Set memory allocation goals. SGA_MAX_SIZE, MEMORY_MAX_SIZE – Upper bounds for dynamic resizing. DB_*_CACHE_SIZE, SHARED_POOL_SIZE, LOG_BUFFER – Component-specific allocations. WORKAREA_SIZE_POLICY – Must be set to . . . Read more
When working with large Oracle databases, particularly in data warehouse environments, it’s crucialto estimate how much space an index will consume before creating it. Without this foresight, you riskrunning out of disk or temporary tablespace, which can cause index creation to fail and potentiallyimpact overall system performance.In this article, I’ll . . . Read more
Answer: – Data Files store actual table data, indexes, and metadata.– Redo Log Files store change vectors (redo entries) that describe how to reapply changes for crash recovery. Answer: Redo ensures durability. By logging the change before applying it, Oracle can recover up to the point of failure in the . . . Read more
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