Oracle Optimizer Statistics Transfer Guide This guide demonstrates how to migrate schema statistics between Oracle databases using DBMS_STATS procedures - crucial for maintaining consistent execution plans across environments. Exporting and importing optimizer statistics in Oracle Database is essential for maintaining …

Oracle Database: Deleting Statistics with DBMS_STATS Package The Oracle Database DBMS_STATS package provides powerful procedures for managing database statistics. This post explores the delete_stats procedures, which are crucial for maintaining accurate query optimization. Understanding DBMS_STATS.DELETE_STATS …

Optimizing Oracle Database Performance with GATHER_SYSTEM_STATS Oracle Database's DBMS_STATS package is a powerful tool for gathering and managing database statistics. This post focuses on the GATHER_SYSTEM_STATS procedure, which is crucial for optimizing query performance by collecting system-level statistics. …

Identifying Oracle Database Hot Blocks using Oracle Table v$system_event: A Comprehensive Guide Purpose Understanding Hot Blocks In an Oracle database, a "hot block" refers to a data block in the buffer cache that experiences a disproportionately high volume of concurrent requests. This contention can lead to …

Oracle "Data Block" Waits using Oracle table v$waitstat to identify disk Contention Purpose In Oracle databases, waiting for "data blocks" signifies contention for specific data blocks in memory. This contention can lead to performance bottlenecks and slowdowns. Understanding the root cause of these waits is crucial to …

Unmasking Buffer Busy Waits in Oracle: A Deep Dive with v$session_wait Purpose "Buffer busy waits" are a common performance bottleneck in Oracle databases, occurring when multiple sessions try to access the same data block concurrently. Identifying the specific blocks and understanding the reasons behind these waits is …

Analyzing Oracle Performance Statistics with v$statname and v$sysstat Purpose Monitoring and understanding your Oracle database instance's performance is crucial for maintaining optimal efficiency. Oracle provides dynamic performance views, such as v$statname and v$sysstat, to access a wealth of performance statistics. …

Real-Time Oracle Rollback Detection: Is Your Database Undoing Changes? This SQL query monitors real-time rollbacks in Oracle databases. It identifies which sessions are actively undoing changes and tracks their progress by observing the used_ublk value (the number of undo blocks in use). When used_ublk reaches zero, …