aed tuning

tuning needs to focus on several aspects of memory tuning CPU using tuning lock competitive tuning I/O Tuning Fundamentals: The number of objects to be transferred to the old age is minimized. Reduce the execution time of full GC. The goal is to minor GC time within 100MS an

Tuning log switching (tuning log switches) Log switching: The LGWR process stops writing logs to the current log file, closes the log file, opens a new log file, and writes the data from the log cache to the new log file. Log switching can either command alter system SWITCH logfile or alter system ARCHIVE log for manual execution, or it can be automatically performed by setting parameters Log_archive_

MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you master more of the tuning and optimization techniques of MySQL.MySQL server hardware and operating

MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you master more of the tuning and optimization techniques of MySQL.MySQL server hardware and operating

JVM Tuning Tool Jconsole,jprofile,visualvm JCONSOLE:JDK, the function is simple, but can be used in a certain load of the system. The garbage collection algorithm is tracked in detail. Detailed description Reference here Jprofiler: Commercial software, you need to pay. function is powerful. Detailed description Reference here VISUALVM:JDK, powerful, similar to Jprofiler. Recommended. How to Tune Observe memory release, collection class checking, Ob

MySQL is a powerful open source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the tricks are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you learn more about MySQL's tuning and optimization skills. MySQL server hardware and operating system

weeks data in tens of millions of.Lan Hua Main 16:13:22Ok.Orchid Island Main 16:16:29So change the SQL:with T1 as (Select count (t.c1), t.c1,t.c2,t.c3,t.c4,t.c5From Tab1 twhere T.c2 not in (' Val1 ', ' val2 ', ' val3 ', ' val4 ', ' VAL5 ')and C1 is not NULLGroup by T.C1, T.C2,T.C3,T.C4,T.C5)Select T1.c1,t1.c2,t1.c3,t1.c4,t1.c5from T1Where NOT EXISTS (Select/*+ Use_hash (m,n) */M.C1, M.C2,M.C3,M.C4,M.C5from T1 m,tab2 Nwhere N.c2 > Sysdate-14and m.c1 = N.c1and t1.c2 = M.C2);Orchid Island Main 16:

This article is the third of the GC expert series. In the first understanding of Java garbage Collection, we learned several different GC algorithm processing processes, the way GC works, the difference between the new generation and the old age. So, you should have known about the 5 GC types in JDK 7, and the performance impact of each GC.The second monitoring of Java garbage collection describes how the JVM runs the GC in real-world scenarios, how to monitor GC data, and what tools are availab

Tags: Star ref note + + limit base min ant into1, Preface: SQL Tuning has been the DBA of the more laborious technology, and many DBAs if not engaged in the development of the work, then tuning is a headache work, even if the SQL tuning is a strong master, in the process of SQL tuning to constantly analyze the executio

Label:Http://www.cnblogs.com/digdeep/p/4885948.htmlMySQL typically runs on Linux systems. Tuning for MySQL is generally divided into Linux OS-level tuning and MySQL-level tuning (and of course, architectural, business, application-level tuning). The operating system is mainly to manage and allocate hardware resources,

Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It has a large number of tuning parameters and techniques to improve the performance of your Oracle database. Or

Lecture 01st: Chapter 01 -- Overview of Oracle9i Database Performance Tuning Lecture 02nd: Chapter 01 -- Overview of Oracle9i Database Performance Tuning Lecture 03rd: Chapter 02 -- Diagnostic and tuning tools Lecture 04th: Chapter 02 -- Diagnostic and tuning tools Lecture 05th: Chapter 02 -- Diagnostic and

Performance Tuning overview: I. Overview 2. what is performance tuning? (What) 3. Why performance optimization? (Why) 4. When do I need performance optimization? (When) 5. where do I need performance tuning? (Where) 6. Who will perform performance optimization? (Who) 7. how to optimize performance? (How) VIII. Summary Note: hardware configuration: CPU Xeon E5620

WebSphere Pool resource tuning-thread pool, connection pool, and ORBFrom: https://www.ibm.com/developerworks/cn/websphere/library/techarticles/1106_zhuxl_websphereenhancement/1106_ Zhuxl_websphereenhancement.htmlIBM WebSphere Application Server (was) can support an increasing number of applications that have their own unique features, requirements, and services. Just as no two applications are using the application server in exactly the same way, we c

Original: Database Engine Tuning AdvisorSQL Server provides a tool called Database Engine Tuning Advisor. This tool helps to confirm an optimal set of indexes for a given workload without requiring an in-depth understanding of the database structure or the internal structure of SQL Server. It can also suggest tuning options for a small subset of problematic queri

ObjectiveIn the field of big data computing, Spark has become one of the increasingly popular and increasingly popular computing platforms. Spark's capabilities include offline batch processing in big data, SQL class processing, streaming/real-time computing, machine learning, graph computing, and many different types of computing operations, with a wide range of applications and prospects. In the mass reviews, many students have tried to use spark in various projects. Most students, including t

Outline: I. Overview 2. What is performance tuning? (What) 3. Why performance optimization? (Why) 4. When do I need performance optimization? (When) 5. Where do I need performance tuning? (Where) 6. Who will perform performance optimization? (WHO) 7. How to optimize performance? (How) VIII. Summary Note: hardware configuration: CPU Xeon e5620 x 2 8 core, 16 GB memory, hard disk raid 10, operating system: ce

SQL Server Tuning Series Article summary: This is a series of articles on SQL Server tuning, which basically covers the decomposition of the query operations we write in the day and the tuning content items, all original ... The first basic module focus on the basic content of the master, a total of 7 articles to complete, covering a series of basic algorithms, d

Label:The main steps used by SQL Tunning Advisor: 1 Setting up Tunning task 2 Execute Task 3 showing tunning results 4 Follow the recommendations to run the corresponding tuning methodHere's how to do it in this order: 1 Setting up test tables and indexes Sql> CREATE TABLE test_sql_advisor as SELECT owner,object_name,object_id from Dba_objects;Table createdSql> Select COUNT (*) from Test_sql_advisor;COUNT (*)----------757229 2 Authorized SYSDBA Permis

collection process are explained.The five articles will explain the principles of Java Program Performance tuning, especially the necessary knowledge in this process and the need to determine whether your program needs tuning. It also describes the problems you may encounter during tuning. At the end of this article, I'll give you some advice on how to make bett