Performance Engineering Interview Questions #18

Following are the Performance Engineering Interview Questions Set #18.

Q. 86 What is the ‘Load Profile’ section of the AWR and what information does it provide?

Ans: The ‘Load Profile’ summarizes key workload characteristics during the snapshot interval, including transactions per second, logical and physical reads, redo size, and other metrics that help assess the database load.

Q. 87 How can you use the ‘Transactions per Second’ metric in performance analysis?

Ans: It indicates the transaction throughput of the database. Sudden changes may point to workload shifts or performance issues affecting transaction processing.

Q. 88 What does a high ‘Redo Size per Transaction’ imply?

Ans: It suggests that transactions are generating a large amount of redo data, possibly due to extensive DML operations or inefficient batch processing. This can impact redo log performance and storage requirements.

Q. 89 How is ‘Logical Reads per Second’ relevant to performance?

Ans: It represents the volume of memory reads from the buffer cache. High values may indicate intensive data processing workloads, necessitating analysis of SQL statements, and indexing strategies.

Q. 90 What can you infer from the ‘User Calls per Second’ metric?

Ans: It reflects the number of calls made by client sessions to the database. High values may be due to chatty applications making frequent calls, which can increase network overhead and processing load.