Oracle Performance General

Query Segment Advisor Recommendations with DBA_ADVISOR_FINDINGS Purpose Which segments are actually worth shrinking right now, and which recommendation is safe to act on without second-guessing it? Oracle already ran that analysis — usually overnight, during the default automatic maintenance window — and wrote the …

Oracle Database: Show Currently Executing SQL Statements Purpose The help desk reports that the database is slow, and you open a session to look. You can see that sessions are connected, but you need to know what they are running. Session names do not tell you that. The SQL text does. It shows whether the load is a …

Oracle Database: Deep Dive into Session Statistics Purpose This Oracle SQL query is designed to retrieve a snapshot of active session statistics for a specific session within your Oracle database. Session statistics provide invaluable insights into the current activity and resource utilization of a particular database …

Pinpoint Resource-Hungry SQL in Oracle: A Performance Optimization Deep Dive Purpose This Oracle SQL query is your go-to tool for identifying SQL statements that are putting a strain on your database resources. By analyzing execution statistics, it highlights queries that are consuming significant disk reads and buffer …

Oracle Database: Unlocking File I/O Insights for Performance Tuning Purpose This Oracle SQL query provides a crucial window into your database's file input/output (I/O) activity. It displays statistics like physical reads, writes, and associated timings for each data file, empowering you to identify I/O bottlenecks and …

Oracle Database: Real-Time SQL Tracing for In-depth Performance Insights Purpose This Oracle database technique empowers you to dynamically enable or disable SQL tracing for specific sessions. SQL tracing captures detailed information about SQL statements executed within a session, providing valuable insights into …

Oracle Performance Tuning: Harness the Power of Event 10046 Tracing Purpose This Oracle Database technique allows you to enable extended SQL tracing using Event 10046. This produces highly detailed trace files capturing SQL statements, wait events, and more, making it an indispensable tool for performance tuning and …

Oracle Database: Understanding Rows per Block for Efficient Storage Purpose This Oracle SQL query helps you analyze the average, maximum, and minimum number of rows stored within each data block for a specific table. Understanding this metric is critical for optimizing storage efficiency, query performance, and overall …

Oracle Database: Deciphering the Buffer Cache Advisory for Performance Gains Purpose This Oracle SQL query, coupled with the necessary system setting, unveils the Buffer Cache Advisory, a valuable tool for optimizing your database's buffer cache size. By estimating the potential reduction in physical reads at various …