最近尝试了一下在 Dell PowerEdge 6850 上部署 EM64T 版本的 Oracle。 Intel 的 EM64T 技术不是真正的 64 位技术，但也可以体验一些 64 位的特性。

Intel EM64T 就是 Extended Memory 64 Technology，也有误缩写做 EMT64 的，通过 EM64T 可以实现 40 位的物理内存寻址与 48 位的虚拟内存寻址。真正的 64 位技术能够实现 50 位的物理地址寻址与 64 位虚拟地址寻址。

对于 Oracle RDBMS 来说，一个显著的变化是能够使用超过 1.7G 的内存边界，SGA 可以默认支持使用 4G 的内存(实际 3.7G 左右)。数据库 Cache 可以设置大一点，这样内存使用效率会好一些。Dell 很多 PC 服务器现在都支持 EM64T , 有不少被用来跑 Oracle 数据库，据我了解，实际使用 EM64T 的用户非常少。PowerEdge 6950 是 AMD 64bit CPU，用户群好像还没有积累起来。

现在 EM64T 已经叫做 Intel64 Architecture 了。

两个参考文档：

Dell 网站的评测报告
Running Oracle on 10g on Windows Server 2003 x64 Editions

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豆瓣上线的前半年里，因为团队只有我一人，豆瓣Blog也夹杂了零星纯粹个人的内容。今天阿北抢闲录开通了，以后我个人的东西将搬到那里去。 豆瓣的团队，包括我自己，将在这里谈论和豆瓣，和工作有关的东西。这虽然是一个团队博客，每篇文章仍是个人写作，使用第一人称。提醒读者注意作者名称，不都是阿北。:) 我期待着更新提速，感谢大家关注！

在经过没有希望，没有尽头的漫长等待后，在熬过孤独，被抛弃和无边的独自承受后，重新见面的时刻，心里剩下的是绝望，愤怒，还是不凋谢的爱？你已经失去了声音，再有没有千言万语的机会，在一堆卡片之中，选出心里最想说的话。   Tags: No Tags

突然发现今天是豆瓣冷笑话小组一周岁的生日，刚刚查看了一下小组的排名（按人数），在豆瓣2万多个小组中，冷笑话小组已经稳坐第2把交椅了，恭喜恭喜！冷笑话小组是我在豆瓣加入的第一个小组，我喜欢冷笑话和兔子，曾大胆地盗用了该小组的图标，作为我在豆瓣的第一个头像，今天在她一周岁生日时趁机认个错误：p 最后，很高兴能和冷笑话小组的成员一起度过他们的第一个生日！ 简单介绍一下我们的寿星： 组名：我们爱讲冷笑话门牌：2984 组长：Gia 人数：13133（此时此刻） 标签：冷笑话历史：本小组的起源 最热闹的小组讨论： 话题回应数 说说各自城市的冷广告牌120 自从上了豆瓣124 冷答案大比拼331 爆强！只一句话的鬼故事585 从前有一盆冷水695 把头留下：大家来玩分析楼上头像1309 送个礼物给所有冷笑话小组成员，你们最最精准的生日时间是： 2006-01-27 19:11:09 小白兔一岁了 企鹅也一岁了 生日快乐 ：）

Posted by Glenn Trewitt and Albert Bodenhamer, Software Engineers



We believe that getting kids interested in science, computers, and technology early on is very important, so we were honored last weekend to receive the "FIRST LEGO^® League Outreach" award at the Northern California FLL championship tournament. FLL is a program encouraging fourth- to eighth-grade kids to study science and technology. Each fall, student teams (who compete at the local, national and international level) build autonomous LEGO^® robots to tackle a set of challenge missions -- and finish as many as they can in 2-½ minutes! This year's challenge: called Nano Quest.

We hosted a couple of FLL meetings and put on our own Google Qualifying Tournament (beta) in December. We loved hosting these events -- they are a great way to reach out to the community, and putting on the tournament was fun! We had a couple of dozen Google volunteers, several FLL volunteers, and 16 student teams -- about 150 people in all. (The winning team from our Northern California region will go on to the World FLL Festival -- 104 teams from 38 countries -- to be held in April in Atlanta.)

So we thought that was that, until next season. Neither we or our partners at Playing@Learning (who coordinate regional FLL events in Northern California, along with the FIRST Vex Challenge, a more ambitious program for high school students) expected what happened next: other Silicon Valley companies took notice, and are now planning to get involved. That's a great kind of viral marketing -- the more outreach, the better.

FLL teams form between May and September, with qualifying tournaments in late November or early December. So if you're between 9 and 14, and robotics and a LEGO^® challenge sound like a lot of fun -- there's bound to be a competition for you.