为什么Oracle在11g R2中把NUMA支持默认关闭了？
最近要在一个比较高配置的服务器上搭建RAC，关注了一下NUMA，发现NUMA在11g R2版本中默认关闭了。Oracle是出于什么考虑将NUMA改为默认关闭呢？ Is NUMA Enabled?
The following query was posted on helpkern as a way to determine whether NUMA is enabled:
select distinct proc_group from x$kcbwds;
If more than one row is returned then NUMA is enabled.
By default NUMA (Non Uniform Memory Access) is turned on in 10.2. It is disabled by default under 10.2.0.5 and 11.2.
从10.2.0.5开始 numa就默认关闭了 。 我的理解是 oracle vos 开发组认为Numa在实际广泛测试后并没带来多大好处，还引入了其他问题。 所以干脆默认不开了。 谢谢Maclean的回答。
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