https://gigaom.com/2011/12/06/facebook-shares-some-secrets-on-making-mysql-scale/ Facebook shares some secrets on making MySQL scale Derrick Harris Dec 6, 2011 - 1:00 PM CST When you're storing every transaction for 800 million users and handling mor…
“90% Percent Time” 表示90%的事务response time 都维持在某个值附近,不是 average response time * 90%;  “Average Time” 平均响应时间.这个值对于响应时间变动趋势很大的情况统计就不准确了,考虑下面两种情况有三个时间:1秒.5秒.12秒,则平均时间为6秒:而另外一种情况:5秒.6秒.7秒,平均时间也为6秒,显然第二种比第一种要稳定多了但是二者如果用平均值来衡量的话则表现一样! 所以,我们在查看平均事务响应时间的时候,先看整…
video from youtube: http://www.youtube.com/watch?v=79NWqv3aPRI one blog post: Monitor All SQL Queries in MySQL http://www.howtogeek.com/howto/database/monitor-all-sql-queries-in-mysql/ more: Using the New MySQL Query Profiler http://web.archive.org/w…
#    WELCOME TO SQUID 3.0.STABLE26#    ----------------------------##    This is the default Squid configuration file. You may wish#    to look at the Squid home page (http://www.squid-cache.org/)#    for the FAQ and other documentation.##    The def…
http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…
Tuning Methodology When dealing with performance problems, database professionals tend to focus on the technical aspects of the system, such as resource queues, resource utilization, and so on. However, users perceive performance problems simply as w…
http://queue.acm.org/detail.cfm?id=1854041 The July/August issue of acmqueue is out now acmqueue is free for ACM professional members. Non-members can purchase an annual subscription for $19.99 or a single issue for $6.99. Download the app from iTune…
In this post, I will give a list of all undocumented parameters in Oracle 12.1.0.1c. Here is a query to see all the parameters (documented and undocumented) which contain the string you enter when prompted: – Enter name of the parameter when prompted…
In this post, I will give a list of all undocumented parameters in Oracle 11g. Here is a query to see all the parameters (documented and undocumented) which contain the string you enter when prompted: – Enter name of the parameter when prompted SET l…
1. Detecting Performance Issues 2. Scripting Strategies 3. The Benefits of Batching 4. Kickstart Your Art 5. Faster Physics 6. Dynamic Graphics 7. Masterful Memory Management 8. Tactical Tips and Tricks 1. Detecting Performance Issues  The Unity Prof…