The article explains the performance problems of using OFFSET and LIMIT for database pagination on large tables, demonstrates their inefficiency with real‑world examples, and presents cursor‑based pagination as a high‑performance alternative that leverages indexed primary keys.
The article explains why using the KEYS command on large Redis datasets can cause service blockage and demonstrates how the SCAN command with MATCH and COUNT options provides a non‑blocking, incremental way to list keys, including syntax and practical examples.
This article explains Oracle cursor concepts, the key V$SQL and V$SQLAREA views with their most important columns for tuning, how open‑cursor limits and the CURSOR_SHARING parameter affect execution plan sharing, and provides practical guidance for DBA performance optimization.
This article explains Oracle cursor concepts, details the key V$SQL and related views, highlights crucial columns for performance tuning, and describes important parameters such as open_cursor and cursor_sharing, helping DBAs optimize SQL execution and manage shared pool memory effectively.
