Why is MySQL so slow in Amazon RDS?
If the sum of all the time returned by the profiling is less than the actual execution time of the query, then maybe other factors like Network bandwidth may be the cause of it.
How long does RDS keep performance insights data?
The default retention period for Performance Insights data is 7 days . That’s the time RDS allows to keep the data without any charges. You can choose to go beyond this window for an extra price. To know more about the extra cost, visit the AWS RDS Performance Insights pricing page.
How to change the time zone in RDS MariaDB?
By default, the time zone for RDS MariaDB DB instances is Coordinated Universal Time (UTC). For more information, see Local time zone for MariaDB DB instances. SQL Server – To change the time zone, specify the time zone when creating a new Amazon RDS for SQL Server instance.
How to troubleshoot a slow running RDS SQL instance?
Troubleshooting a slow running RDS SQL instance would usually start with the DBA quickly having a look at these counters for an idea about of the system’s overall health. This would be followed by checking currently running queries and statements.
How can we use RDS SQL Server to troubleshoot performance bottlenecks?
Amazon RDS SQL Server now supports Performance Insights. How can we use it to troubleshoot SQL Server performance bottlenecks? Amazon Web Services’ (AWS) managed database platform, RDS, frees up most DBAs from installing, configuring, patching or backing up database servers.
How often does performance insights query RDS instance?
To get this kind of information, Performance Insights queries the RDS instance’s internal data structures in memory once every second. It’s not a disk-based operation, so the sampling does not put any pressure on the system. Later, we will talk about the types of data that’s collected during the samplings.
How to slow query tracing in Amazon MySQL?
Towards the bottom is a section marked Log Exports. Check the Slow query log, but be careful! This option will require a DB restart, so you want to schedule it for a time of low usage. You would think that would be it, but it’s not. To get logs to export, you need to set a number of database parameters, too.
What does it mean when MySQL Query is slow?
`long_query_time` — this defines the threshold beyond which a query is considered slow. Values are in seconds (the docs have more detail), so 2 means log anything that runs more than 2 seconds. Since the default is 0, nothing will be logged unless you change this.
Why is MySQL cache off by default in RDS?
It is worth noting that, for whatever reason, MySQL query cache is OFF by default in RDS. We learned that the hard way ourselves this week. This won’t help performance of your initial query, but it may speed things up in general. To re-enable query cache: Be sure to set both query_cache_size and query_cache_type