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Storage Engine
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– The MEMORY storage engine is now included in MySQL 5.5 by default.
– MySQL Cluster has been updated to version 7.3.
– The InnoDB storage engine now supports FULLTEXT indexes.
– InnoDB now provides support for Memcached integration through the InnoDB Memcached Plugin.
InnoDB Changes
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– A number of optimizations have been made, including improvements in buffer pool management, locking, and scalability.
– The InnoDB Performance Schema instrumentation has been expanded.
– InnoDB now includes support for partitioning a table by RANGE or LIST on a secondary index.
Performance Schema
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– The Performance Schema has been enhanced with several new tables, including tables for transaction summary by user, table IO operations, and file IO operations.
– The Performance Schema now includes support for statement, stage, and connection summary by user and host.
GIS
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– The GIS functionality provides spatial analysis capabilities including spatial indexing, geometry functions, and querying capabilities.
– The GIS capabilities are further enhanced with new functions for polygon union, intersection, and overlap.
Other Improvements
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– MySQL now includes support for server-side prepared statements.
– Improvements have been made to SQL parsing and the optimizer.
– A number of additional changes have been made to improve performance, scalability, and reliability.
