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How much memory does MySQL use in Amazon RDS?
MySQL allocates buffers and cache to carry out database operations. For more information, see the MySQL Documentation for How MySQL Uses Memory. When using Amazon RDS, 80% to 90% of the available memory on an instance is allocated with the default parameters.
Why is my MariaDB server out of memory?
If the MariaDB server is crashing because of ‘out-of-memory’ then it is probably wrongly configured. There are two kind of buffers in MariaDB: Query cache query_cache_size . Internal ones used during engine index creation ( myisam_sort_buffer_size, aria_sort_buffer_size). Internal buffers for storing blobs.
When to worry about RDS running out of freeable memory?
Short answer – you shouldn’t worry about FreeableMemory unless it is became really low (about 100-200 Mb) or significant swapping occur (see RDS SwapUsage metric). FreeableMemory is not a MySQL metric, but OS metric.
Why is my Amazon RDS instance using swap memory?
If you see that a large amount of swap is used and you have low FreeableMemory, your DB instance might be under memory pressure, which can degrade performance. For more information, see Why is my Amazon RDS instance using swap memory when I have sufficient memory? To monitor the resource utilization on a DB instance, enable Enhanced Monitoring.
What should max connections be in Aurora MySQL?
The max_connections value can be different for Aurora MySQL and RDS MySQL DB instances that use the same instance class. The values listed apply only to Aurora MySQL. Make sure to consider the following when working with the max_connections parameter for your DB instance.
What causes an Amazon RDS DB instance to go out?
For more information about modifying a DB instance, see Modifying an Amazon RDS DB instance . A DB instance outage can occur when a DB instance is rebooted. It can also occur when the DB instance is put into a state that prevents access to it, and when the database is restarted.