Oracle和MySQL - 博客园

Script:列出用户表空间的定额

摘要：以下脚本用于列出用户表空间的使用量和定额:PROMPT Print the details of the Users Tablespace QuotasTTITLE left _date center ' Database Users Space Quotas by Tablespace' skip 2 Quotas by Tablespace"COL un format a25... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(190) 评论(0) 推荐(0)

利用ProcDump工具诊断Windows平台上的Oracle数据库性能

摘要： ProcDump与Procexp一样是Windows平台上的内部调试工具，Procexp采用图形界面体现系统整体及个别进程的性能信息，而ProcDump则与我们在Unix平台上使用的性能分析工具类似使用CLI命令行界面。Procdump目前的版本号为3.04，可以从其Homepage上下载到该工具，该监控软件由Mark Russinovich开发，是一款Free Software。其官方介绍如下:... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(348) 评论(0) 推荐(0)

Restore Production Database to Development Platform A step-by-step example

摘要： Overview of setup and configuration Oracle Enterprise Edition 11gR2. 11.2.0.1.0 Linux RH5 NetBackup 6.5.5 Identical environments: Identical versions of Oracle. Same ORACLE_HOME and ORACLE_BASE. The ar... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(141) 评论(0) 推荐(0)

Buffer Cache Hit Ratio

摘要： SolutionBy itself, the buffer cache hit ratio is not very meaningful except for databases with undersized data buffer cache (db_cache_size parameter).Oracle provides the data buffer cache advisory uti... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(166) 评论(0) 推荐(0)

Cardinality

摘要： The terms "high cardinality" and "low cardinality" are frequently used when discussing table columns. A high cardinality column means that a column has many unique values. For example, a primary key c... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(193) 评论(0) 推荐(0)

Oracle Compressed Indexes

摘要： Key compressed indexes are a way to index a low cardinality column without talking up as much space storing the repetitive values. Please view the Oracle Manuals for a full description on implementing... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(147) 评论(0) 推荐(0)

DB Commit Time

摘要： Average number of milliseconds waiting for the "log file sync" event, indicating commit times for this database. SolutionsIf this is high, review solutions presented in the help file for "log file syn... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(206) 评论(0) 推荐(0)

DFS lock handle等待事件

摘要： The session waits for the lock handle of a global lock request on the distributed file system (DFS). It is most common in a parallel server situation. SolutionsDuring a period of wait, use the followi... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(649) 评论(0) 推荐(0)

提高DBWR进程的吞吐量

摘要： Improve DBWR ThroughputTo improve DBWR's throughput, consider the following: Disk capabilities and setup (stripe size, speed, controllers etc...) Using raw devices instead of File System files -- depe... 阅读全文

posted @ 2013-03-19 00:47 Oracle和MySQL 阅读(323) 评论(0) 推荐(0)

Changing an Init.ora Parameter

摘要： To change an init.ora parameter, follow these steps. Open the file called init.ora. For example, if the database is called oraprod, then the file would be called initoraprod.ora. The file can be in a ... 阅读全文