Internals and Portability

Internals and Portability:
• Written in C and C++.
• Tested with a broad range of different compilers.
• Works on many different platforms. See Section 2.1.1, “Operating Systems Supported by MySQL
Community Server”.
• For portability, uses CMake in MySQL 5.5 and up. Previous series use GNU Automake, Autoconf,
and Libtool.
• Tested with Purify (a commercial memory leakage detector) as well as with Valgrind, a GPL tool
(http://developer.kde.org/~sewardj/).
• Uses multi-layered server design with independent modules.
• Designed to be fully multi-threaded using kernel threads, to easily use multiple CPUs if they are
available.
• Provides transactional and nontransactional storage engines.
• Uses very fast B-tree disk tables (MyISAM) with index compression.
• Designed to make it relatively easy to add other storage engines. This is useful if you want to provide
an SQL interface for an in-house database.
• Uses a very fast thread-based memory allocation system.
• Executes very fast joins using an optimized nested-loop join.
• Implements in-memory hash tables, which are used as temporary tables.
• Implements SQL functions using a highly optimized class library that should be as fast as possible.
Usually there is no memory allocation at all after query initialization.
• Provides the server as a separate program for use in a client/server networked environment, and as
a library that can be embedded (linked) into standalone applications. Such applications can be used
in isolation or in environments where no network is available.
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