mysql temp table performance

table structure can be optimized enough to ensure excellent performance and meet scalability requirements. It is unknown that the database design 3 paradigm, which was regarded as the "Bible" N years ago, has not been fully applied. Here I have sorted out some common optimization techniques for database table structure design, hoping to be useful to you. This

MySQL supports the two main table storage format Myisam,innodb, last month when doing a project, first used InnoDB, the result is particularly slow, 1 seconds can only insert 10. Later replaced by the MyISAM format, a second inserted tens of thousands of bars. It was decided that the performance of the two tables was too different. Later, I guess, should not be s

MySQL Performance-Schema (1) configuration table, performanceschema Performance-schema was first introduced in MYSQL 5.5, but now more metrics are added to performance-Schema in MYSQL 5

MYSQL Performance Optimization-database/table sharding and non-stop modification of mysql table structure. For more information, see MYSQL Performance Optimization-database/

Performance-schema first appeared in MySQL 5.5, and now 5.6,5.7 Performance-schema added more monitoring items, more statistical information, more and more oracle-awr statistical information Bright, is the DBA children's shoes for performance diagnostic analysis of the gospel. This article mainly discusses the configur

Next to the previous articleMySQL database performance optimization-Cache Parameter Optimization, This isMySQL database performance optimization topicsThe second article in the series: Table Structure of MySQL database performance optimization ManyDatabase design paradigmAs

memory. Oracle Temporary tables The table definition remains in the data dictionary unless the drop table is executed.2. SQL Server temp tables do not have features similar to the Oracle Temp table transaction level.3 SQL Server local temporary

for many records of the table is not suitable for direct use.2. Performance optimization approach to limit paging problemSpeed up paged queries with table overlay indexesAs we all know, if you only include that index column (overwriting index) in the statement that uses the index query, then this will query quickly. Because the index is used to find the optimiza

Label:1, sub-database sub-tableObviously, a main table (that is, very important tables, such as user tables) unlimited growth is bound to seriously affect performance, sub-library and sub-table is a very good solution, that is, the performance optimization approach, now the case is that we have a 1000多万条 record of the

Reprint Http://www.jb51.net/article/5620.htmMySQL supports the two main table storage format Myisam,innodb, last month to do a project, the first use of InnoDB, the result is particularly slow, 1 seconds can only insert 10. Later into the MyISAM format, one second to insert tens of thousands of bars. It was decided that the performance of the two tables was too different. Later, I guess, should not be diffe

1. database/table sharding Obviously, the unlimited growth of a primary table (that is, a very important table, such as a user table) will inevitably seriously affect performance. Database sharding and table sharding are a good so

1. database/table sharding Obviously, the unlimited growth of a primary table (that is, a very important table, such as a user table) will inevitably seriously affect performance. Database sharding and table sharding are a good

MySQL supports two main table storage formats: MyISAM and InnoDB. InnoDB was used for a project last month. The results are very slow and only a dozen pieces can be inserted in one second. Later I changed to MyISAM format and inserted tens of thousands of entries in one second. At that time, the performance of the two tables was also significantly different. Late

MySQL performance optimization of the sub-database table with no downtime to modify the MySQL table structure, the need for friends can refer to the next1, sub-database sub-tableObviously, a main table (that is, very important tab

, the return value cannot be negative.Key partition: Partition According to the hash function provided by the MySQL database.Partitioning and performance:　　Database applications are divided into two categories: OLTP (online transaction processing), such as blogs, e-commerce, online games, and OLAP (online analytical processing), such as data warehouses, data marts.For OLAP applications, partitioning can do

In Rails, a MySQL Partition Table is used to improve the performance. railsmysql The partition table of MySQL is a simple and effective feature for processing large data tables. Through this feature, applications can efficiently process large data tables with few changes, ho

The Oracle temporary tablespace is used primarily for querying and storing some buffer data. The primary reason for the temporary table space consumption is the need to sort the intermediate results of the query.Restarting the database frees up the temporary tablespace, assuming that the instance cannot be restarted, and the temp table space continues to grow as

MySQL supports the two main table storage format Myisam,innodb, last month when doing a project, first used InnoDB, the result is particularly slow, 1 seconds can only insert 10. Later replaced by the MyISAM format, a second inserted tens of thousands of bars. The performance of the two tables was too different. Later, I guess, should not be so slow, it is estima

The MySQL lock is available in the following ways:1. Table-level lock, low overhead, lock fast, no deadlock, lock granularity is high, the probability of lock conflict is highest, and the concurrency is the lowest. The MyISAM engine belongs to this type.2. Row-level Lock: High overhead, locking slow, deadlock, locking granularity is minimal, the probability of lock collision is the lowest, and the concurren

1, the Sub-Library table Obviously, a primary table (that is, a very important table, for example, user table) Unlimited growth is bound to seriously affect performance, the library and the table is a very good solution, that is