database engine tuning advisor

charset UTF8;Or, after you create the table, addALTER TABLE Articles ADD fulltext (title,body);The correct usage for full-text indexing is:SELECT * from articles where match (title,body) against (' words to search ');In addition, MySQL's own fulltext for English, want to search Chinese need to use the Sphinx full-Text search engine or use the enhanced version of the fuzzy query.Attention:Full-text indexes are not exactly equivalent to fuzzy queriesFo

Database optimization tutorial (10) [excellent chapter] solve the four ways in which indexes are not used when like '% str', tuning % strIii. Index 7. Four methods to solve like '% str' without fuzzy query As mentioned above, the index will not be used as long as the fuzzy search value is prior to the string, neither '% aaa' nor' _ aaa' will be used! As follows: It should be said that this is a joke tha

Database Tuning tutorial (2) Prepare slow query data and optimize Databases 1. Slow query found In the previous section, we talked about the definition of slow queries. This section describes how to create a large table and prepare data for slow queries. 2. Prepare slow query data To find slow queries, you must first make slow queries happen. Slow queries are not allowed in a common table of magnitude, un

less than 3 characters are not included in the full-text index and can be modified by modifying the MY.CNF option Ft_min_word_len=3 But! Full-text indexes are not exactly equivalent to fuzzy queries For example, the title field has such data ' ABCD20088CCAA ', using a fuzzy query select * from articles wheretitle like '%2008% ' can be found, while using full-text Search select * from articles where match (title) against (' 2008 ') is not retrieved because 2008 is not a word! 4) using the full-

);} /// ///generate time information from the GUID returned by SQL SERVER/// /// comb that contain time information/// Time Public Staticdatetime getdatefromcomb (System.Guid Guid) {datetime basedate=NewDateTime (1900,1,1); byte[] Daysarray =New byte[4]; byte[] Msecsarray =New byte[4]; byte[] Guidarray =GUID. Tobytearray (); //Copy The date parts of the GUID to the respective byte arrays.Array.copy (Guidarray, Guidarray.length-6, Daysarray,2,2); Array.copy (Guidarray, Guidarray.length-4, Ms

) (locking mechanism issues). 4. To read the main business, such as: Www,blog image information Database, user database, commodity library and other business. 5. The data modifies a relatively small number of businesses (clogging problems). 6. The requirements for data consistency are not very high business. 7. The machine with poor hardware resources can be used

Tags: database tuning database MySQL slow query performance optimization First, find slow query We talked about the definition of a slow query, which we create a large table for data preparation for slow queries. 2. Slow query data preparation To find a slow query, you first have to make the slow query happen. A slow query cannot occur in a table of ordinary

) SQLServer2008 includes dynamic governance Views (Dynamicmanagementview) and extensions to existing views to show more information about the mirroring session.Hot Add CPUTo extend existing support in SQL Server to add memory resources online, the hot-add CPU allows the database to scale as needed. In fact, CPU resources can be added to the hardware platform on which SQLServer2008 is located without the need to stop the application.(iii) Best and pred

Tags: view fetch number test Sam run fix stat slow cacheMySQL TuningHardware configurationNetwork bandwidthMySQL Run parametersSlow query logNetwork architectureMultiple instances (multiple database services running on a single server)Sub-LibrarySub-table When a database server handles requests from clients that are slow,What could be the cause? Low hardware configuration: (Memory CPU hard disk I/O)View Har

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