Accurate statistics are essential for Oracle database performance, enabling the query optimizer to create efficient execution plans. For a table like test, which may experience frequent data changes, automating statistics collection ensures consistent query performance without manual effort. This article provides a corrected PL/SQL script to create an Oracle Scheduler job for gathering statistics on […]

Physical reads in Oracle databases, where data is retrieved directly from disk, can significantly impact query performance and system efficiency. High physical read activity often signals inefficient buffer cache usage or suboptimal SQL execution plans. By leveraging Oracle’s DBA_HIST_SQLSTAT and V$SESSTAT views, database administrators can pinpoint resource-intensive SQL statements and sessions, enabling targeted performance tuning. […]

Parallel indexing in Oracle databases can significantly enhance query performance by leveraging multiple CPU cores to process operations concurrently. However, improper use of parallelism can lead to resource contention or inefficiencies. This article outlines how to identify, monitor, and manage parallel indexes and tables in an Oracle database to optimize performance. Below, we provide corrected […]

Lock and blocking sessions in an Oracle database can significantly impact performance, causing delays and resource contention. The “Oracle Database Lock and Blocking Sessions Script” provides a comprehensive set of SQL queries to identify, analyze, and resolve locking issues. This blog post explains the purpose, functionality, and usage of the scripts, with corrections to errors […]

Maintaining the health of an Oracle database is critical for ensuring performance, availability, and compliance. The “Oracle Database Health Check Script” provides a comprehensive set of SQL queries and commands to monitor key database components, including instance status, tablespace usage, ASM disk groups, backups, jobs, and more. This blog post explains the script’s purpose, functionality, […]

Oracle Automatic Storage Management (ASM) is a powerful feature for managing database storage, and monitoring disk group usage is essential for ensuring optimal performance and preventing storage-related issues. The “Oracle ASM Disk Group Usage Script” provides a straightforward way to check the disk group usage in an Oracle ASM environment, helping administrators track available space […]

Monitoring user logon activities in an Oracle database is critical for security and auditing purposes. The “Oracle Database User Logon Mail Script With DBLink” is a powerful tool designed to track user logins across databases and send email notifications with relevant details. This script leverages Oracle’s database link (DBLink) feature to access remote database information […]