High Performance My SQL  THIRD EDITION A locking strategy is a compromise between lock overhead and data safety, and thatcompromise affects performance. Most commercial database servers don't give youmuch choice: you get what is known as row-level lo…

BACKGROUND OF THE INVENTION The present invention relates to data transfer across domains, and more particularly, to data transfer across a number of different protection domains using page remapping. Operating systems that utilize different protecti…

After we introduced locked thread detection to Plumbr couple of months ago, we have started to receive queries similar to “hey, great, now I understand what is causing my performance issues, but what I am supposed to do now?” We are working hard to b…

Data Race Detector 数据种类探测器:数据种类探测器手册 Introduction Usage Report Format Options Excluding Tests How To Use Typical Data Races Race on loop counter Accidentally shared variable Unprotected global variable Primitive unprotected variable Supported Systems…

小结: 1. conflicting access 2.性能危害 优化 The cost of race detection varies by program, but for a typical program, memory usage may increase by 5-10x and execution time by 2-20x. 3.典型案例与修复 Accidentally shared variable // ParallelWrite writes data to file1…

Articles Locking in Microsoft SQL Server (Part 12 – Lock Escalation) http://dba.stackexchange.com/questions/12864/what-is-lock-escalation 2008 R2 Lock Escalation (Database Engine) ---Forward from Locking in Microsoft SQL Server (Part 12 – Lock Escala…

ABSTRACT Recent technological advancement have led to a deluge of data from distinctive domains (e.g., health care and scientific sensors, user-generated data, Internet and financial companies, and supply chain systems) over the past two decades. The…

今天,在一台旧机器上编译一个新的Mysql,install时出了错: /usr/local/mysql_5615/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql_5615/ --datadir=/mnt/disk1/mysql_5615/ Installing MySQL system tables...-- :: [Warning] TIMESTAMP with implicit DEFAULT value is…

在介绍Lock与synchronized时,先介绍下Lock: public interface Lock { void lock(); void lockInterruptibly() throws InterruptedException; boolean tryLock(); boolean tryLock(long time, TimeUnit unit) throws InterruptedException; void unlock(); Condition newCondition…

最近在看Java Threads第三版,收获颇多.全英文阅读,感觉真的是爽歪歪.推荐大家都看看. 这一篇想系统的讲一讲,线程之间通信的2种模式,wait-notify 和 Condition. 先上一个生产者和消费者的例子 package waitnotify; import java.util.ArrayList; import java.util.List; import java.util.Random; public class Data { private List<Integer>…