Any program that spends a lot of time doing PL/SQL processing, as opposed to issuing DDL statements likeCREATE TABLEthat are just passed directly to SQL. You will want to investigate native compilation. Because many built-in database features use PL/SQL, you can apply this tuning feature to...
版工曾听过台湾某半导体大厂的新进程序员,所组出来的一段 PL/SQL 跑了好几分钟还跑不完;想当然尔,即使他的 AJAX 及ooxx框架用得再漂亮,系统性能也会让使用者无法忍受。以下是版工整理出的一些数据库规划、SQL performance tuning 简单心得,让长年钻研 .NET、AJAX、一堆高深 ooxx framework,却无暇研究 SQL sta...
As Figure E-1 shows, if your application is database-intensive, you can use control structures to group SQL statements in a PL/SQL block, then send the entire block to Oracle. This can drastically reduce communication between your application and Oracle. Also, you can use PL/SQL subprograms...
15. SQL Performance Tuning recommends when cretin data are used frequently, it is a good idea to store them into intermediate tables. 16. SQL Performance Tuning OR vs. IN. Our tests showed that using IN in WHERE condition is a little faster then using OR. Example: --Do not use: SELECT...
Oracle ACE authors with decades of experience building complex production systems for government, industry, and educational organizations present a hands-on approach to enabling optimal results from PL/SQL. Real-world examples and...Rosenblum Michael...
SQL Server Articles SQL Server Database Performance Tuning You’re a developer, DBA, or sysadmin stuck with long running queries in SQL Server, and you need to do SQL Server performance tuning. I can help! I’m a consultant, and I do this for a living. I don’t keep anything secret ...
Oracle Performance Tuning —— 我的学习理解过程 1. Gathering Database Statistics Using the Automatic Workload Repository Gathering database statistics using the AWR is enabled by default and is controlled by theSTATISTICS_LEVELinitialization parameter. TheSTATISTICS_LEVELparameter should be set toTYPICALor...
You'll learn the basics of SQL performance tuning: How to get and read an execution plan How to create indexes and materialized views to make SQL faster How to find the slowest SQL statements in your code What do I get for completing the class?
Spark SQL 之 Performance Tuning & Distributed SQL Engine 转载请注明出处:http://www.cnblogs.com/BYRans/ 缓存数据至内存(Caching Data In Memory) Spark SQL可以通过调用sqlContext.cacheTable("tableName") 或者dataFrame.cache(),将表用一种柱状格式( an inmemory columnar format)缓存至内存中。然后Spa...
I am implementing Power BI service (reporting system ) in Professional year project,We have 6 databases hosted on SQL Server on premise. Step 1:Plan is to connect all 6 databases to SSAS(On premise) Step 2: Connect SSAS to Power BI Service. ...