HelloDBA http://www.hellodba.com/blog/index.php Copyright 2009, Fuyuncat Fuyuncat zh-CN HelloDBA <![CDATA[Oracle 11g 直接IO自动调节]]> http://www.HelloDBA.com/reader.php?ID=187&lang=cn 文档 http://www.HelloDBA.com/reader.php?ID=187&lang=cn fuyuncat Wed, 04 Jan 2012 05:25:31 GMT http://www.HelloDBA.com/reader.php?ID=187&lang=cn <![CDATA[Oracle 11g Direct IO Auto Tune]]> http://www.HelloDBA.com/reader.php?ID=187&lang=en 文档 http://www.HelloDBA.com/reader.php?ID=187&lang=en fuyuncat Wed, 04 Jan 2012 05:25:31 GMT http://www.HelloDBA.com/reader.php?ID=187&lang=cn <![CDATA[小表临界值测试]]> http://www.HelloDBA.com/reader.php?ID=186&lang=cn 文档 http://www.HelloDBA.com/reader.php?ID=186&lang=cn fuyuncat Thu, 29 Dec 2011 08:53:12 GMT http://www.HelloDBA.com/reader.php?ID=186&lang=cn <![CDATA[Test Around Small Table Threshold]]> http://www.HelloDBA.com/reader.php?ID=186&lang=en 文档 http://www.HelloDBA.com/reader.php?ID=186&lang=en fuyuncat Thu, 29 Dec 2011 08:53:12 GMT 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<![CDATA[DISTINCT聚集函数转换]]> http://www.HelloDBA.com/reader.php?ID=183&lang=cn 文档 http://www.HelloDBA.com/reader.php?ID=183&lang=cn fuyuncat Wed, 31 Aug 2011 02:43:30 GMT http://www.HelloDBA.com/reader.php?ID=183&lang=cn <![CDATA[Distinct Aggregate Transformation]]> http://www.HelloDBA.com/reader.php?ID=183&lang=en 文档 http://www.HelloDBA.com/reader.php?ID=183&lang=en fuyuncat Wed, 31 Aug 2011 02:43:30 GMT http://www.HelloDBA.com/reader.php?ID=183&lang=cn <![CDATA[FyDB成为开源项目]]> http://www.HelloDBA.com/reader.php?ID=182&lang=cn 下载 http://www.HelloDBA.com/reader.php?ID=182&lang=cn fuyuncat Tue, 09 Aug 2011 05:29:19 GMT http://www.HelloDBA.com/reader.php?ID=182&lang=cn <![CDATA[FyDB becomes an open source project]]> http://www.HelloDBA.com/reader.php?ID=182&lang=en 下载 http://www.HelloDBA.com/reader.php?ID=182&lang=en fuyuncat Tue, 09 Aug 2011 05:29:19 GMT http://www.HelloDBA.com/reader.php?ID=182&lang=cn <![CDATA[空还是非空——浅谈非空约束对执行计划以及性能的影响]]> http://www.HelloDBA.com/reader.php?ID=181&lang=cn 文档 http://www.HelloDBA.com/reader.php?ID=181&lang=cn fuyuncat Thu, 21 Jul 2011 08:01:37 GMT http://www.HelloDBA.com/reader.php?ID=181&lang=cn <![CDATA[NULL or NOT NULL --- NOT NULL constraint impacts on execution plan and performance]]> http://www.HelloDBA.com/reader.php?ID=181&lang=en 文档 http://www.HelloDBA.com/reader.php?ID=181&lang=en fuyuncat Thu, 21 Jul 2011 08:01:37 GMT http://www.HelloDBA.com/reader.php?ID=181&lang=cn <![CDATA[FyDB --- 一个分布式内存No-SQL数据库]]> http://www.HelloDBA.com/reader.php?ID=180&lang=cn 文档 http://www.HelloDBA.com/reader.php?ID=180&lang=cn fuyuncat Mon, 11 Jul 2011 00:48:21 GMT http://www.HelloDBA.com/reader.php?ID=180&lang=cn <![CDATA[FyDB --- a distributed in-memory no-SQL DB]]> http://www.HelloDBA.com/reader.php?ID=180&lang=en 文档 http://www.HelloDBA.com/reader.php?ID=180&lang=en fuyuncat Mon, 11 Jul 2011 00:48:21 GMT http://www.HelloDBA.com/reader.php?ID=180&lang=cn <![CDATA[FyDB --- 一个分布式内存No-SQL数据库]]> http://www.HelloDBA.com/reader.php?ID=180&lang=cn 文档 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<![CDATA[An Oracle Call Tracer For Windows(32)]]> http://www.HelloDBA.com/reader.php?ID=6&lang=en 下载 http://www.HelloDBA.com/reader.php?ID=6&lang=en fuyuncat Fri, 28 May 2010 00:23:50 GMT http://www.HelloDBA.com/reader.php?ID=6&lang=cn <![CDATA[Oracle 内部函数调用追踪器 for windows(32)]]> http://www.HelloDBA.com/reader.php?ID=6&lang=cn 文档 http://www.HelloDBA.com/reader.php?ID=6&lang=cn fuyuncat Fri, 28 May 2010 00:23:50 GMT http://www.HelloDBA.com/reader.php?ID=6&lang=cn <![CDATA[An Oracle Call Tracer For Windows(32)]]> http://www.HelloDBA.com/reader.php?ID=6&lang=en 文档 http://www.HelloDBA.com/reader.php?ID=6&lang=en fuyuncat Fri, 28 May 2010 00:23:50 GMT http://www.HelloDBA.com/reader.php?ID=6&lang=cn Look Oracle from inside (tracing internal calls) --- Latches http://www.hellodba.com/Doc/Look_Oracle_from_inside_4_en.html 文档 http://www.hellodba.com/Doc/Look_Oracle_from_inside_4_en.html fuyuncat Tue, 15 Jun 2010 06:54:07 GMT http://www.hellodba.com/Doc/Look_Oracle_from_inside_4_en.html Look Oracle from inside (tracing internal calls) --- Lock (Enqueue) http://www.hellodba.com/Doc/Look_Oracle_from_inside_3_en.html 文档 http://www.hellodba.com/Doc/Look_Oracle_from_inside_3_en.html fuyuncat Fri, 11 Jun 2010 07:41:48 GMT http://www.hellodba.com/Doc/Look_Oracle_from_inside_3_en.html Look Oracle from inside (tracing internal calls) --- Logical IOs http://www.hellodba.com/Doc/Look_Oracle_from_inside_2_en.html 文档 http://www.hellodba.com/Doc/Look_Oracle_from_inside_2_en.html fuyuncat Thu, 10 Jun 2010 05:43:58 GMT http://www.hellodba.com/Doc/Look_Oracle_from_inside_2_en.html Look Oracle from inside (tracing internal calls) --- Execution Plan http://www.hellodba.com/Doc/Look_Oracle_from_inside_1_en.html 文档 http://www.hellodba.com/Doc/Look_Oracle_from_inside_1_en.html fuyuncat Wed, 09 Jun 2010 03:52:11 GMT http://www.hellodba.com/Doc/Look_Oracle_from_inside_1_en.html OraTracer upgrade http://www.hellodba.com/Download/OraTracer_upgrade.htm 下载 http://www.hellodba.com/Download/OraTracer_upgrade.htm fuyuncat Tue, 01 Jun 2010 08:27:13 GMT http://www.hellodba.com/Download/OraTracer_upgrade.htm An Oracle Call Tracer For Windows(32) http://www.hellodba.com/Download/OraTracer_en.html 下载 http://www.hellodba.com/Download/OraTracer_en.html fuyuncat Fri, 28 May 2010 08:23:50 GMT http://www.hellodba.com/Download/OraTracer_en.html Oracle 内部函数调用追踪器 for windows(32) http://www.hellodba.com/Download/OraTracer_cn.html 下载 http://www.hellodba.com/Download/OraTracer_cn.html fuyuncat Fri, 28 May 2010 08:15:50 GMT http://www.hellodba.com/Download/OraTracer_cn.html Query Execution Call Stack Trace http://www.hellodba.com/Doc/Query_Execution_Call_stack_trace.html 文档 http://www.hellodba.com/Doc/Query_Execution_Call_stack_trace.html fuyuncat Wed, 12 May 2010 09:54:07 GMT http://www.hellodba.com/Doc/Query_Execution_Call_stack_trace.html 执行计划(Execution Plan)过程分析 http://www.hellodba.com/Doc/Execution_Plan_cn.html 文档 http://www.hellodba.com/Doc/Execution_Plan_cn.html fuyuncat Fri, 30 Apr 2010 09:13:41 GMT http://www.hellodba.com/Doc/Execution_Plan_cn.html SQL Rolling Invalidation http://www.hellodba.com/Doc/SQL_Rolling_invalidation_en.htm 文档 http://www.hellodba.com/Doc/SQL_Rolling_invalidation_en.htm fuyuncat Mon, 19 Apr 2010 07:06:26 GMT http://www.hellodba.com/Doc/SQL_Rolling_invalidation_en.htm 布隆过滤器 （Bloom Filter） http://www.hellodba.com/Doc/Bloom_Filter.html 文档 http://www.hellodba.com/Doc/Bloom_Filter.html fuyuncat Thu, 25 Mar 2010 08:22:14 GMT http://www.hellodba.com/Doc/Bloom_Filter.html Oracle的排序 http://www.hellodba.com/Doc/oracle_sorting_cn.htm 文档 http://www.hellodba.com/Doc/oracle_sorting_cn.htm fuyuncat Thu, 18 Mar 2010 03:17:15 GMT http://www.hellodba.com/Doc/oracle_sorting_cn.htm All about oracle sorting http://www.hellodba.com/Doc/oracle_sorting_en.htm 文档 http://www.hellodba.com/Doc/oracle_sorting_en.htm fuyuncat Thu, 18 Mar 2010 03:11:51 GMT http://www.hellodba.com/Doc/oracle_sorting_en.htm TIPS: 快速建立OUTLINE http://www.hellodba.com/Doc/quick_outline.htm 文档 http://www.hellodba.com/Doc/quick_outline.htm fuyuncat Mon, 15 Mar 2010 02:46:03 GMT http://www.hellodba.com/Doc/quick_outline.htm CBO 中如何计算调整的MBRC http://www.hellodba.com/Doc/CBO_MBRC_formula_cn.html 文档 http://www.hellodba.com/Doc/CBO_MBRC_formula_cn.html fuyuncat Wed, 10 Mar 2010 07:30:12 GMT http://www.hellodba.com/Doc/CBO_MBRC_formula_cn.html Adjusted MBRC formual in CBO http://www.hellodba.com/Doc/CBO_MBRC_formula_en.html 文档 http://www.hellodba.com/Doc/CBO_MBRC_formula_en.html fuyuncat Wed, 10 Mar 2010 07:22:26 GMT http://www.hellodba.com/Doc/CBO_MBRC_formula_en.html CBO代价估算 http://www.hellodba.com/Doc/CBO_Cost_Estimation_cn.html 文档 http://www.hellodba.com/Doc/CBO_Cost_Estimation_cn.html fuyuncat Mon, 08 Mar 2010 03:22:28 GMT http://www.hellodba.com/Doc/CBO_Cost_Estimation_cn.html CBO Cost estimation http://www.hellodba.com/Doc/CBO_Cost_Estimation.html 文档 http://www.hellodba.com/Doc/CBO_Cost_Estimation.html fuyuncat Fri, 05 Mar 2010 08:07:07 GMT http://www.hellodba.com/Doc/CBO_Cost_Estimation.html NULL IS NOT NULL in execution plan http://www.hellodba.com/Doc/NULL_IS_NOT_NULL.html 文档 http://www.hellodba.com/Doc/NULL_IS_NOT_NULL.html fuyuncat Thu, 04 Mar 2010 03:09:52 GMT http://www.hellodba.com/Doc/NULL_IS_NOT_NULL.html CBO Statistics data gathering and internal arithmetic analysis -- Sampling http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_5.html 文档 http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_5.html fuyuncat Wed, 20 Jan 2010 07:34:44 GMT http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_5.html CBO Statistics data gathering and internal arithmetic analysis -- Calculating NDV and Density http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_4.html 文档 http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_4.html fuyuncat Mon, 18 Jan 2010 06:23:13 GMT http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_4.html CBO Statistics data gathering and internal arithmetic analysis -- Converting to endpoint value http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_3.html 文档 http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_3.html fuyuncat Wed, 13 Jan 2010 03:06:07 GMT http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_3.html CBO Statistics data gathering and internal arithmetic analysis -- Frequency or Height Balanaced? http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_2.html 文档 http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_2.html fuyuncat Mon, 11 Jan 2010 06:13:34 GMT http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_2.html CBO Statistics data gathering and internal arithmetic analysis -- when will gather histogram data http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_1.html 文档 http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_1.html fuyuncat Thu, 07 Jan 2010 09:47:08 GMT http://www.hellodba.com/Doc/CBO_STATS_GATHER_INTERNAL_1.html 《Oracle IO 问题解析》PDF下载 http://www.hellodba.com/Download/ORACLE_IO_PDF.html 下载 http://www.hellodba.com/Download/ORACLE_IO_PDF.html fuyuncat Tue, 05 Jan 2010 09:22:19 GMT http://www.hellodba.com/Download/ORACLE_IO_PDF.html 《Oracle 中 ROWNUM 的使用技巧》PDF下载 http://www.hellodba.com/Download/ORA_ROWNUM_PDF.html 下载 http://www.hellodba.com/Download/ORA_ROWNUM_PDF.html fuyuncat Thu, 31 Dec 2009 09:44:54 GMT http://www.hellodba.com/Download/ORA_ROWNUM_PDF.html TIPS: 如何获取数据的存储大小 http://www.hellodba.com/Doc/sys_op_opnsize.html 文档 http://www.hellodba.com/Doc/sys_op_opnsize.html fuyuncat Wed, 30 Dec 2009 09:10:55 GMT http://www.hellodba.com/Doc/sys_op_opnsize.html 《Oracle 10g特性》PDF文档下载 http://www.hellodba.com/Download/Oracle_10_features_pdf.html 下载 http://www.hellodba.com/Download/Oracle_10_features_pdf.html fuyuncat Fri, 25 Dec 2009 03:20:19 GMT http://www.hellodba.com/Download/Oracle_10_features_pdf.html [En] Oracle Row Shipping http://www.hellodba.com/Doc/Oracle_row_shipping_en.html optimzating -> Row Source generating -> result producting. In traditional mode, one job of Row Source gernerator is that choose the columns in SELECT clause from the rows return to client, which named Projection. We could find such information from output DBMS_XPLAN (10g later): ]]> 文档 http://www.hellodba.com/Doc/Oracle_row_shipping_en.html fuyuncat Fri, 25 Dec 2009 01:21:17 GMT http://www.hellodba.com/Doc/Oracle_row_shipping_en.html [中]Oracle Row Shipping http://www.hellodba.com/Doc/oracle_row_shipping_cn.html 优化(Optimize)->生产数据源(Row Source Generate)->返回结果(Result Product)。在传统模式下，数据源生成组件(Row Source Generator)要做一步工作就是从记录中找出SELECT子句的中出现的字段，返回给客户端，这一过程称为投射（Projection）。我们可以通过DBMS_XPLAN(10g)查看查询计划中的投射字段信息]]> 文档 http://www.hellodba.com/Doc/oracle_row_shipping_cn.html fuyuncat Thu, 24 Dec 2009 05:26:15 GMT http://www.hellodba.com/Doc/oracle_row_shipping_cn.html 《Oracle 内存全面分析》PDF下载 http://www.hellodba.com/Download/ora_Memory_pdf.html 下载 http://www.hellodba.com/Download/ora_Memory_pdf.html fuyuncat Tue, 22 Dec 2009 01:12:43 GMT http://www.hellodba.com/Download/ora_Memory_pdf.html 《ORA-01555 错误浅析》PDF下载 http://www.hellodba.com/Download/ora_1555_pdf.html 下载 http://www.hellodba.com/Download/ora_1555_pdf.html fuyuncat Mon, 21 Dec 2009 09:22:44 GMT http://www.hellodba.com/Download/ora_1555_pdf.html Oracle Redo Strand http://www.hellodba.com/Doc/oracle_redo_strand_en.html 文档 http://www.hellodba.com/Doc/oracle_redo_strand_en.html fuyuncat Fri, 18 Dec 2009 06:26:13 GMT http://www.hellodba.com/Doc/oracle_redo_strand_en.html Oracle Redo 并行机制 http://www.hellodba.com/Doc/Oracle_redo_strand_cn.html 文档 http://www.hellodba.com/Doc/Oracle_redo_strand_cn.html fuyuncat Fri, 18 Dec 2009 04:05:22 GMT http://www.hellodba.com/Doc/Oracle_redo_strand_cn.html Unwrap 工具更新 http://www.hellodba.com/Download/fyunwrap_upgrade.html 下载 http://www.hellodba.com/Download/fyunwrap_upgrade.html fuyuncat Mon, 23 Nov 2009 09:28:02 GMT http://www.hellodba.com/Download/fyunwrap_upgrade.html HowTo: Trace the statistics data gathtering http://www.hellodba.com/Doc/trace_stat_gathering.html 文档 http://www.hellodba.com/Doc/trace_stat_gathering.html fuyuncat Thu, 19 Nov 2009 05:59:21 GMT http://www.hellodba.com/Doc/trace_stat_gathering.html Oracle 内存回滚 (In Memory Undo) http://www.hellodba.com/Doc/Oracle_IMU_CN.html 文档 http://www.hellodba.com/Doc/Oracle_IMU_CN.html fuyuncat Tue, 17 Nov 2009 03:12:09 GMT http://www.hellodba.com/Doc/Oracle_IMU_CN.html Oracle In Memory Undo http://www.hellodba.com/Doc/Oracle_IMU.html 文档 http://www.hellodba.com/Doc/Oracle_IMU.html fuyuncat Mon, 16 Nov 2009 08:16:22 GMT http://www.hellodba.com/Doc/Oracle_IMU.html Secret of oracle logical IO: Index Scan http://www.hellodba.com/Doc/logic_io_secret_index_scan.html 文档 http://www.hellodba.com/Doc/logic_io_secret_index_scan.html fuyuncat Wed, 11 Nov 2009 02:29:55 GMT http://www.hellodba.com/Doc/logic_io_secret_index_scan.html Secret of oracle logic IO: Sorting http://www.hellodba.com/Doc/logic_io_secret_sorting.html 文档 http://www.hellodba.com/Doc/logic_io_secret_sorting.html fuyuncat Tue, 10 Nov 2009 01:14:31 GMT http://www.hellodba.com/Doc/logic_io_secret_sorting.html Secret of oracle logic 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