我想对数据库里的表作分析 analyze table stat.TA000104 compute statistics for all columns; 做完后，使用以下语句查看： select table_name,column_name,last_analyzed from user_tab_columns where table_name='TA000104'; 结果发现last_analyzed出居然没显示。 这张表我作了partition 然后，我在另一个数据库里又挑了一张作了partition的表作分析 analyze table VMIS.AREAPARA compute statistics for all columns; 这次再...
In this third case we get to see some really fun stuff: The effect of analyze on index selection for a three table join, an ORDER BY with LIMIT optimization, and documented evidence that what we'll fix makes a night and day difference for the better. The customer in this case runs a gaming website using the Neocrome Land Down Under website engine. The customer's website averages...
这是一个链接分析工具，借助 nutch/tools/DistributedAnalysisTool.java 做了一个封装，便于更方便的使用 nutch/tools/LinkAnalysisTool.java 上 RUN: mydb 3 进行3层链接分析 程序先打开webDB/stats 看有多少page,linke 一下三行代码可以看出 stats文件的内容 int version = (byte) in.read(); this.totalPages = in.readLong(); this.totalLinks = in.readLong(); 然后根据分...
A Case Study on debugging a system panic due to memory corruption. System panics due to kernel heap corruption The system panicked multiple times. This crash dump was taken after setting kmem_flags. SolarisCAT(vmcore.4):10> stat core file: /cores/63804466/vmcore.4 user: Cores User (cores:911) release: 5.8 (64-bit) version: Generic_108528-24 machine: sun4u n...
我这里有一块新的36G硬盘，放在sun multipack中。为了确认硬盘是否存在物理问题，使用format中的analyze中的verify对全盘进行检查。但是检查的进程意外中断了。再进入format并选择此盘的时候，提示该盘没有进行lable，选yes。然后查看分区情况，发现分区变成了另外一种形式，和之前的完全不同。之前在这块硬盘的一个分区上已经建立了文件系统，而且mount成功了。我手动修改了分区表，恢复成原来的状态，进行lable。但是再一次verif...
Any tool out there can monitor SCO Unix 505 tcp/ip ? I can't find the snoop command....
A nice artical talking about IDS locking :- http://www-128.ibm.com/developerworks/db2/library/techarticle/dm-0609herber/
我的数据库一做analyze或vacuum或者是其他导入导出命令报如下错误 FATAL: XLogFlush: request 0/CCB6018 is not satisfied --- flushed only to 0/CA26 请问什么原因？怎样处理？谢谢！ [ 本帖最后由 YOU_NG 于 2006-6-30 10:23 编辑 ]
