HTML5集成了所有ria的功能，包括数据库连接和把正式的W3C印章加到AJAX。
To make things even more complicated, HTML 5 is incorporating all sorts of RIA functionality, including database connectivity, and putting the formal W3C stamp on AJAX.
它包括了数据库连接数量，内存分配，以及相互共存，通常是不相关系统之间的共存问题。
It includes things such as number of connections to the database, memory allocation, and coexistence with other, often unrelated systems.
例如，常见的可伸缩性问题，包括同步问题和数据库连接，直到负载测试的时候还没有表露。
For example, common scalability problems, including synchronization issues and database contention, do not surface until load tests.
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