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Why is my Amazon RDS using so much CPU?
I am experiencing high CPU utilization on my Amazon Relational Database Service (Amazon RDS) for MySQL, MariaDB, or Amazon Aurora for MySQL instances. How can I troubleshoot and resolve high CPU utilization? Several factors can cause an increase in CPU utilization.
Why is MySQL instance using so much CPU?
You can use Performance Insights to identify the exact queries that are running on the instance and causing high CPU usage. First, enable Performance Insights for MySQL. Then, you can use Performance Insights to optimize your workload after consulting with your DBA.
How are DB instances represented in Amazon RDS?
Amazon RDS DB instance classes support Intel Hyper-Threading Technology, which enables multiple threads to run concurrently on a single Intel Xeon CPU core. Each thread is represented as a virtual CPU (vCPU) on the DB instance. A DB instance has a default number of CPU cores, which varies according to DB instance type.
What to do when RDS is using slow query log?
Tip: When you use Slow Query Log or General Query Log, set the parameter log_output to FILE. You can also use the MariaDB Audit Plugin to audit database activity such as users who are logging on to the database or queries that are run against the database.
How to know if mysqld is using too much CPU?
In the operating system (OS) process list section of Enhanced Monitoring, review the OS processes and RDS processes to confirm the percentage of CPU utilization of a mysqld or Aurora process. These metrics can help you confirm if the increase in CPU utilization is caused by OS or RDS processes.
How to reduce CPU usage in Amazon cloud?
First, you can identify the source of the CPU usage by: After you identify the source, you can analyze and optimize your workload to reduce CPU usage. Enhanced Monitoring provides granular real-time metrics that you can review in addition to Amazon CloudWatch metrics, which provide statistics each minute.
How can I tell if my CPU utilization is too high?
You can use CloudWatch metrics to identify CPU patterns over extended periods. Compare the graphs WriteIOPs, ReadIOPs, ReadThroughput, and WriteThroughput with the CPU utilization to find out the times at which the workload caused high CPU.
What does high Amazon RDS load average mean?
For the same load average, exceeding 170 indicates that the machine is under heavy load during the time frame measured: Note: Amazon RDS gives your workload a higher priority over other tasks that are running on the DB instance. To prioritize these tasks, workload tasks have a higher Nice value.
What does NICE% mean in Amazon RDS?
Note: Amazon RDS gives your workload a higher priority over other tasks that are running on the DB instance. To prioritize these tasks, workload tasks have a higher Nice value. As a result, in Enhanced Monitoring, Nice% represents the amount of CPU being used by your workload against the database.
How does Amazon RDS work with PostgreSQL?
PostgreSQL logging parameters to log long-running queries, autovacuum, lock waits, and connection and disconnection requests, and so on. For more information, see How do I enable query logging using Amazon RDS for PostgreSQL?
Is there a problem with MySQL CPU usage?
We’re running an m1.xlarge MySQL RDS server and having some issues with high CPU usage. We had some problems a couple of weeks ago with CPU utilization reaching 100% on a large instance.
What’s the CPU usage on my DB Server?
For the last week or so CPU utilization has been in the high 90s, reaching 100% or thereabouts consistently yesterday, which ground our production site to a halt. After rebooting the db server, within hours CPU usage climbed back up to the same levels.