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Aurora MySQL variances

At work with Aurora MySQL I believed would be a draft, but its delicate variances make me scratch my head. Thus, I want to find out further about this and transcribe a post.


What is Aurora?


It's a mySQL wire procedure well-suited storage organization system that sits on top of mySQL and adjusts some innodb internals. You can read approximately more of the architecture here: I contemplate of it as a Proxy Storing Engine System


The changes start from fair starting the server. Aurora MySQL has Enormous Page provision turned on by defaulting since AWS introductions Aurora MySQL server with their tradition flag for innodb big page provision:


innodb_shared_buffer_pool_uses_huge_pages


This is not an open source situation known by MySQL authorized build. In fact, there is not much info on this situation at all. I can only accept RDS instances are organized with Huge page provision as comprehensive here and this custom situation for Aurora goes big page provision on for mysqld.

So, what else is dissimilar between Aurora and Innodb? From Amazon's documents


The following MySQL limitations do not put on to Aurora MySQL:


  • innodb_adaptive_flushing

  • innodb_adaptive_flushing_lwm

  • innodb_checksum_algorithm

  • innodb_doublewrite

  • innodb_flush_method

  • innodb_flush_neighbors

  • innodb_io_capacity

  • innodb_io_capacity_max

  • innodb_log_buffer_size

  • innodb_log_file_size

  • innodb_log_files_in_group

  • innodb_max_dirty_pages_pct

  • innodb_use_native_aio

  • innodb_write_io_threads

  • thread_cache_size

The subsequent MySQL standing variables do not put on to Aurora MySQL:

  • innodb_buffer_pool_bytes_dirty

  • innodb_buffer_pool_pages_dirty

  • innodb_buffer_pool_pages_flushed

Note

These leans are not comprehensive.


In immediate, Aurora uses mySQL but it's also a deposit on top of mySQL. In all core, it's just additional storage engine which splits Innodb and delivers administration primitives made into the DBMS system.


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