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in 10g, Oracle launched its own SQL optimization aids :  SQL Optimizer (SQL Tuning Advisor :STA) , it is the new Dbms_sqltune package. Use the STA to make sure that the optimizer is in CBO mode. but I think that using this tool is only suitable

when you set different size db_block_size in the local management table space, the data file header reserve space corresponds to the following:--?? db_block_size=2kb, the file header retains 32 pieces of data, i.e. 64KB. db_block_size=4kb, the file

OverviewOne of the previous blogs has written about server logins, server roles, database users, database roles, and some knowledge of the theory, so you can look at this blog: logins, server roles, user names, and database roles. This blog focus on

These days to do dynamic menu with the plug-in, the current use of a very wide open source framework, the latest release of the Qui framework is the use of this plugin development of the menu part, so it is well worth in-depth research and learning,

SQL queries the database, you can take a series of ways to improve the speed and performance of queries. For example, use case instead of update, using temporary tables and batch updates, and so on. This article introduces 7 ways to improve the

Event playback uses OpenVPN to transmit virtual desktop traffic. The terminal screen is obviously refreshed frame by frame, and the network environment is a 10-Gigabit LAN.Analysis 1. First, change OpenVPN to the TCP mode, because the difference

For more information about FTP servers, see the previous blog: http://yttitan.blog.51cto.com/70821/1178663.It should be emphasized that the file server we previously implemented with Samba can only be used within the lan. If users on the internet

A Microsoft spokesman confirmed on September 18 that Microsoft plans to launch Silverlight 3 and Expression Studio 3 software design tools in September. Silverlight 3 has more than 50 new features, including 3D, graphics processor acceleration, H.26

Recently, the BetaNews website tested Opera 10.50 Beta, and selected the current highest version of Build 3271, slightly lower than the latest version released today. According to the test results, the overall performance of Opera 10.50 Beta has

Last weekend, Firefox 13 ushered in Beta 7. Soon after, Mozilla uploaded the official version of the download file on the official FTP, although the official website is not updated to Firefox 13, but if you can't wait to try the new version,

BKJIA quick translation] at present, most mainstream browsers have a certain degree of password management mechanism, but do you really have no worries about handing over passwords to them? Let's take a look. It is convenient for Web browsers to

Aoyou, a world-leading software service company, today launched the RC2 version of The aoyou cloud browser. This is another comprehensive optimization and performance improvement of maxcompute's cloud browser after the RC version was launched in

In IPv6, we can experience new performance. Now let's talk about the IPv6 Domain Routing Protocol in detail. First, let's take a look at the routing protocol types in the network. At present, the IP domain routing protocol mainly uses IS-IS and OSPF.

Today, I sorted out the url regular example of the url and the email address, and summarized the usage of jquery and js. There is no difference between others. I hope you can help me with this tutorial. A friend asked me this question today, so I

The urgent needs for high-speed data services and the future needs for video services provide unprecedented opportunities for broadband access, and various broadband access technologies are emerging. The ATM-based PON combines the capabilities that

I believe many Internet users are no longer familiar with the 3G term. In the face of the arrival of 3G, many netizens cheered for the new "Broadband" era, because after a long wait, netizens can finally get rid of the limitations of wired networks,

3G network cards are currently a hot spot in the market. High-speed wireless Internet access has aroused a lot of interest. With the maturity of 3G technology, wireless Internet access will become the way to access the Internet in the future. In

The Protocol of the ultra-wideband wireless technology-the ultra-wideband wireless protocol. If you know about this technology, you must have some knowledge about this protocol. Next, this article mainly introduces the UWB wireless communication

The slow speed of wireless networks and unstable signals are widely recognized as drawbacks. In fact, the actual situation may not be a problem with the network itself. Have you checked whether the parameter settings of your hardware device are

The innovative wireless LAN Design of HP ProCurve multi-service mobile (MSM) architecture not only allocates independent resources to the management, control, and data forwarding layers, but also distributes the intelligence of the network to the