What is the difference between AWR and ADDM report?

What is the difference between AWR and ADDM report?

The Automatic Database Diagnostic Monitor (ADDM) analyzes data in the Automatic Workload Repository (AWR) to identify potential performance bottlenecks. For each of the identified issues it locates the root cause and provides recommendations for correcting the problem.

What is AWR and ADDM?

The Automatic Database Diagnostic Monitor (ADDM) is a self-diagnostic engine built into Oracle Database. ADDM examines and analyzes data captured in the Automatic Workload Repository (AWR) to determine possible performance problems in Oracle Database.

What is the use of AWR ADDM ash?

Using ADDM AWR ASH Reports. ADDM is diagnostic software built into Oracle Database. ADDM examines and analyzes data captured in Automatic Workload Repository (AWR) to determine possible database performance problems.

What is the difference between AWR and ash?

AWR – It holds historic past snapshot intervals and the session performance statistics for analysis later. ASH report provides the following information: Top Events. Load Profile.

What is Oracle ASH report?

ASH reports enable you to perform analysis of: Transient performance problems that typically last for a few minutes. Scoped or targeted performance analysis by various dimensions or their combinations, such as time, session, module, action, or SQL identifier.

What is the difference between ash and AWR?

AWR – historic past snapshot intervals. AWR, stores the session performance statistics for analysis later. ASH – the storage is not persistent and as time progresses, the old entries are removed to accommodate new ones. They can be viewed using V$ACTIVE_SESSION_HISTORY.

What does AWR stand for?

The Agency Workers Regulations (AWR) were introduced in 2011 as a measure to protect agency workers by granting them the same rights as employees.

What is CPU wait in Oracle?

“CPU Wait” time is Oracle foreground process OS CPU run queue time. I ran an experiment (detailed below) and as the OS CPU utilization increased, so did the DB Time “gap” implying that the gap is CPU run queue time or at least a significant part of it.

How do you read AWR report for performance issues?

Reading the AWR Report The main sections in an AWR report include: Report Summary: This gives an overall summary of the instance during the snapshot period, and it contains important aggregate summary information. Cache Sizes (end): This shows the size of each SGA region after AMM has changed them.