Comments for OS与Oracle http://www.os2ora.com 专注于现实世界Oracle数据库的高性能，高可扩展性与新一代数据库Exadata架构 Thu, 08 Sep 2011 13:01:35 +0000 hourly 1 http://wordpress.org/?v=3.2.1 Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by Kaya http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3825 Kaya Thu, 08 Sep 2011 13:01:35 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3825 呵，Tom也用过这个Demo呢。 呵，Tom也用过这个Demo呢。

]]> Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by Kaya http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3824 Kaya Thu, 08 Sep 2011 13:00:25 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3824 翻墙。。或许应该把它下载下来并上传到国内的视频网站，不过我不知怎么下载。。 翻墙。。或许应该把它下载下来并上传到国内的视频网站，不过我不知怎么下载。。

]]> Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by Kaya http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3823 Kaya Thu, 08 Sep 2011 12:58:34 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3823 我一直把它和交通系统类比，二十四车道的公路，非要并行开几千辆车，不可能开得快，不可能不发生小摩擦，不可能不互相等待。。 我一直把它和交通系统类比，二十四车道的公路，非要并行开几千辆车，不可能开得快，不可能不发生小摩擦，不可能不互相等待。。

]]> Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by liusx http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3806 liusx Tue, 06 Sep 2011 02:03:50 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3806 上面的demo从哪里可以下载？ 上面的demo从哪里可以下载？

]]> Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by cityvigil http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3649 cityvigil Mon, 29 Aug 2011 02:36:48 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3649 英文不好， “如果把Connection 的个数降到96，又会有什么结果？ ” 我看“OLTP Performance – Concurrent Mid-Tier Connections ”这个视频，他是把 [c]Set Initial pool Size 从1024调到96. -->可是不清楚为何性能就提高了那么多? 英文不好，
“如果把Connection 的个数降到96，又会有什么结果？ ”

我看“OLTP Performance – Concurrent Mid-Tier Connections ”这个视频，他是把
[c]Set Initial pool Size 从1024调到96.

–>可是不清楚为何性能就提高了那么多?

]]> Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by cityvigil http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3646 cityvigil Mon, 29 Aug 2011 01:14:20 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3646 我们这翻不出去的，看不到， 可惜呀！ 有什么别的方法吗？我看那个视频比较小，能不能下载下来，共享一下:) 我们这翻不出去的，看不到，
可惜呀！
有什么别的方法吗？我看那个视频比较小，能不能下载下来，共享一下:)

]]> Comment on OLTP Performance Video – Concurrent Mid-Tier Connections and Trouble of Parsing by Charlie 木匠 (@mujiang) http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/comment-page-1/#comment-3629 Charlie 木匠 (@mujiang) Fri, 26 Aug 2011 21:30:46 +0000 http://www.os2ora.com/oltp-performance-video-concurrent-mid-tier-connections-and-trouble-of-parsing/#comment-3629 the goal, in system design, is to not allow the system to kill itself. A lot of people, for some reason, find it counterintuitive that FEWER CONNECTIONS can do a lot more work (better throughput) than A LOT OF CONNECTIONS can do. http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:2143974700346554115#3145977500346972164 the goal, in system design, is to not allow the system to kill itself. A lot of people, for some reason, find it counterintuitive that FEWER CONNECTIONS can do a lot more work (better throughput) than A LOT OF CONNECTIONS can do.

http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:2143974700346554115#3145977500346972164

]]> Comment on Exadata V2 架构分析 (1) by boypoo http://www.os2ora.com/exadata-architecture-analysis-1/comment-page-1/#comment-3628 boypoo Fri, 26 Aug 2011 17:22:12 +0000 http://www.os2ora.com/exadata-architecture-analysis-1/#comment-3628 kaiyao,如何能让cell node的CPU利用起来呢？今天开始正式测试，OLTP的性能居然没有原先的单节点好，challenge。 kaiyao,如何能让cell node的CPU利用起来呢？今天开始正式测试，OLTP的性能居然没有原先的单节点好，challenge。

]]> Comment on Exadata V2 架构分析 (4) by hzhou http://www.os2ora.com/exadata-architecture-analysis-4/comment-page-1/#comment-3584 hzhou Sun, 21 Aug 2011 13:50:31 +0000 http://www.os2ora.com/exadata-architecture-analysis-4/#comment-3584 在EHCC中pctfree是失效的。也不会发生行迁移，但如果你更新一行记录，这行记录会以oltp的方式进行存贮。 请教： 以我的理解，oltp的方式应该就是指原始的行存储方式吧？那如果更新了某个CU里面的一条记录的话你估计Exadata会怎么做呢？ 在EHCC中pctfree是失效的。也不会发生行迁移，但如果你更新一行记录，这行记录会以oltp的方式进行存贮。

请教：

以我的理解，oltp的方式应该就是指原始的行存储方式吧？那如果更新了某个CU里面的一条记录的话你估计Exadata会怎么做呢？

]]> Comment on Linux性能分析工具重点推荐 – nmon analyser by wangliang http://www.os2ora.com/linux-performance-analysis-tool-recommend-nmon-analyser-2/comment-page-1/#comment-3442 wangliang Tue, 09 Aug 2011 03:22:05 +0000 http://www.os2ora.com/linux-performance-analysis-tool-recommend-nmon-analyser-2/#comment-3442 "可以用nmon analyser来产生由collectl产生的文件。这当然需要对nmon analyser的脚本做一定的改写" 有具体的改写代码的方法和步骤吗？ “可以用nmon analyser来产生由collectl产生的文件。这当然需要对nmon analyser的脚本做一定的改写”
有具体的改写代码的方法和步骤吗？

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