DB 2V8.2.2 forLinux现在包含这样一种能力，即对基于NUMA的服务器上的逻辑数据库分区支持本地内存numa亲和力。
DB2 V8.2.2 for Linux now includes the ability to support local memory NUMA-affinity for logical database partitions on NUMA-based servers.
DB 2Express在整个数据库服务器中最多支持4GB内存(数据库引擎将限制内存消耗，使其不超过4 GB)。
DB2 Express is limited to 4 GB of memory for the entire database server (the database engine will throttle the amount of memory consumption such that it does not exceed the 4 GB limit).
根据一份SAP文档，HANA放在内存中的数据由一个记录事务并具有能创建数据库映像的保存点的持久化层提供支持，这让它能够从停电或其它的中断中恢复。
Data held in memory by HANA is backed by a persistence layer that logs transactions and incorporates savepoints that create images of the database, according to an SAP document.
由于跨数据库查询不被支持，所以跨多个数据库的分区是个棘手的问题，任何union或join操作都需要在内存中完成。
Partitioning across multiple databases wouldn’t be a big deal if it were not for the fact that cross-database queries are not supported, forcing any unions or joins to be done in memory.
以内存数据库作为其底层支持。
以内存数据库作为其底层支持。
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