1. SQL Performance Tuning team recommends using COUNT(1) instead COUNT(*) for SQL query performance optimization. Example: --Do not use: SELECT COUNT(*) FROM master; --Use: SELECT COUNT(1) FROM master; 2. Never compare NULL with NULL. Consider that NULL is not like an empty string or...
作者:eygle | 【转载请注出处】|【云和恩墨 领先的zData数据库一体机 | zCloud PaaS云管平台 | SQM SQL审核平台 | ZDBM 数据库备份一体机】 链接:https://www.eygle.com/archives/2012/08/database_performance_tuning_download.html 《Oracle数据库性能优化》一书在2005年出版,至今已有8年,该书已经绝版,而且...
On the basis of these problems, research needs to be done to improve the performance of the application. This research uses SQL Tuning, Structuring Objects, and Initial Parameter Database methods. After testing by processing the payment of Pension Benefits (LM18 report), the au...
name>SQL SELECT 1 FROM DUAL</test-table-name> <login-delay-seconds>0</login-delay-seconds> <statement-cache-size>5</statement-cache-size> <statement-cache-type>LRU</statement-cache-type> <remove-infected-connections>true</remove-infected-connections> <seconds-to-trust-an-idle-pool-connection...
SQL statement performance Change management 2)实例调优(DBA负责) MemoryDatabase structure Instance configuration 3)操作系统(DBA与系统管理员合作) I/O Swap Parameters 三、调优方法论 OWI全称 Oracle Wait Interface,即基于等待事件的调优方法。等待事件到11g已发展到近1000个。从10g开始,性能调优的重点已经不再单...
C H A P T E R 15 Executing SQL in Parallel Parallelism can help improve performance on particular operations simply by assigning multiple resources to a task. Parallelism is … - Selection from Oracle Database 11g Performance Tuning Recipes: A Problem-S
oracle performance tuning guide https://docs.oracle.com/cd/E11882_01/server.112/e41573/toc.htmVLDB and Partitioning Guide https://docs.oracle.com/cd/E11882_01/server.112/e25523/toc.htmUtilitiesAdvanced Application Developer's GuideSQL Language Reference...
Ingest to targets like Hadoop, Kafka, JMS, NoSQL databases and Machine Learning. Learn more (PDF) GoldenGate for high availability and scalability Oracle GoldenGate increases database availability and scalability by providing read/write (active-active) databases in multiple regions or data centers. ...
Part I Performance Tuning 1 Performance Tuning Overview 1.1 Introduction to Performance Tuning 1.1.1 Performance Planning 1.1.2 Instance Tuning 1.1.2.1 Performance Principles 1.1.2.2 Baselines 1.1.2.3 The Symptoms and the Problems 1.1.2.4 When to Tune 1.1.3 SQL Tuning 1.1.3.1 Query Optimizer ...
welcome to my oracle support get the most out of your oracle products and services, find answers, engage with communities, and resolve issues. sign in help us route you to a support portal email required next unified sign in experience for cloud users we redesigned the sign in page as part...