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NEW QUESTION 53
A business just transitioned from an on-premises Oracle database to Amazon Aurora PostgreSQL. Following the move, the organization observed that every day around 3:00 PM, the application's response time is substantially slower. The firm has determined that the problem is with the database, not the application.
Which set of procedures should the Database Specialist do to locate the erroneous PostgreSQL query most efficiently?
- A. Modify the logging database parameter to log all the queries related to locking in the database and then check the logs after the next slow period for this information.
- B. Enable Amazon RDS Performance Insights on the PostgreSQL database. Use the metrics to identify any queries that are related to spikes in the graph during the next slow period.
- C. Create an Amazon CloudWatch dashboard to show the number of connections, CPU usage, and disk space consumption. Watch these dashboards during the next slow period.
- D. Launch an Amazon EC2 instance, and install and configure an open-source PostgreSQL monitoring tool that will run reports based on the output error logs.
Answer: B
Explanation:
Explanation
https://aws.amazon.com/blogs/database/optimizing-and-tuning-queries-in-amazon-rds-postgresql-based-on-nativ
"AWS recently released a feature called Amazon RDS Performance Insights, which provides an easy-to-understand dashboard for detecting performance problems in terms of load." "AWS recently released a feature called Amazon RDS Performance Insights, which provides an easy-to-understand dashboard for detecting performance problems in terms of load."
NEW QUESTION 54
A media company is using Amazon RDS for PostgreSQL to store user dat
a. The RDS DB instance currently has a publicly accessible setting enabled and is hosted in a public subnet. Following a recent AWS Well- Architected Framework review, a Database Specialist was given new security requirements.
Only certain on-premises corporate network IPs should connect to the DB instance. Connectivity is allowed from the corporate network only.
Which combination of steps does the Database Specialist need to take to meet these new requirements? (Choose three.)
- A. Modify the pg_hba.conf file. Add the required corporate network IPs and remove the unwanted IPs.
- B. Move the DB instance to a private subnet using AWS DMS.
- C. Connect to the DB instance using private IPs and a VPN.
- D. Enable VPC peering between the application host running on the corporate network and the VPC associated with the DB instance.
- E. Modify the associated security group. Add the required corporate network IPs and remove the unwanted IPs.
- F. Disable the publicly accessible setting.
Answer: C,D,F
NEW QUESTION 55
A company is planning to close for several days. A Database Specialist needs to stop all applications along with the DB instances to ensure employees do not have access to the systems during this time. All databases are running on Amazon RDS for MySQL.
The Database Specialist wrote and executed a script to stop all the DB instances. When reviewing the logs, the Database Specialist found that Amazon RDS DB instances with read replicas did not stop.
How should the Database Specialist edit the script to fix this issue?
- A. Use the AWS CLI to stop each read replica and source instance at the same time
- B. Stop the read replicas before stopping their source instances
- C. Delete each read replica before stopping its corresponding source instance
- D. Stop the source instances before stopping their read replicas
Answer: A
NEW QUESTION 56
A company runs hundreds of Microsoft SQL Server databases on Windows servers in its on-premises data center. A database specialist needs to migrate these databases to Linux on AWS.
Which combination of steps should the database specialist take to meet this requirement? (Choose three.)
- A. On the AWS Management Console, set up AWS Database Migration Service (AWS DMS) by entering details of the source SQL Server database and the destination SQL Server database on AWS. Start migration.
- B. Install AWS Systems Manager Agent on the on-premises servers. Use Systems Manager Run Command to install the Windows to Linux replatforming assistant for Microsoft SQL Server Databases.
- C. On the Amazon EC2 console, launch EC2 instances and select a Linux AMI that includes SQL Server. Install and configure AWS Systems Manager Agent on the EC2 instances.
- D. Use AWS Systems Manager Run Command to install and configure the AWS Schema Conversion Tool on the on-premises servers.
- E. Open the Windows to Linux replatforming assistant tool. Enter configuration details of the source and destination databases. Start migration.
- F. On the AWS Management Console, set up Amazon RDS for SQL Server DB instances with Linux as the operating system. Install AWS Systems Manager Agent on the DB instances by using an options group.
Answer: B,C,E
Explanation:
https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/replatform-sql-server.html
https://d1.awsstatic.com/events/reinvent/2019/REPEAT_1_Leverage_automation_to_re-platform_SQL_Server_to_Linux_WIN322-R1.pdf
NEW QUESTION 57
......
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