firebird database performance comparison

statement and clickFirst, the Database design optimization1. Do not use cursors.Using cursors not only takes up memory, but also locks tables in incredible ways, so that all the performance optimizations that DBAs can do are equal to not being done. Each fetch in the cursor is equal to the execution of a select.2. Create an appropriate indexWhenever you add an index to a table, select is faster, and insert

processing capability. It can be seen that the hardware performance of the computer system is from high to generation: CPU -- cache (L1-L2-L3) -- memory -- SSD hard disk -- Network -- Hard Disk Based on the database knowledge, we can list the main work of each hardware type: CPUAnd memory: Cache data access, comparison, sorting, transaction detection, SQL parsi

Original address: http://www.cnblogs.com/qiusnay/archive/2010/03/15/1686500.html 3. Performance and efficiency 5.3. Fixed length and variable length table A data table containing any varchar, text, and other variable-length fields, which is a variable-length table, whereas a fixed-length table. L for variable-length tables, many deletions and changes on them will cause more fragmentation in the table because of the different size of the record. You

This article is based on MySQL. Many content applies to other relational databases at the same time and requires some indexing knowledge. It focuses on how to optimize SQL to improve database performance. This article is based on MySQL. Many content applies to other relational databases at the same time and requires some indexing knowledge. It focuses on how to optimize SQL to improve

Tags: distinct unique HTML distance responsibility delay WWW Statistics subquery Preface Note: This article is based on the background of MySQL, many of which are applicable to other relational databases and need some index knowledge. Optimize your Goals1. Reduce the number of IO Io is always the most vulnerable to the database, which is determined by the responsibility of the database, most of the

denominator of these routines is to implement the actions from a global perspective." "Xiang Wang said. At this stage, user feedback and operational monitoring are the main sources of DBA Discovery database performance problems. When a failure is discovered, the DBA needs to use manual instructions or professional monitoring and analysis software to troubleshoot the system's fault points and determine rea

Instance analysis ORACLE database performance optimization, instance analysis oracle ORACLE Database optimization methods differ greatly from those of MYSQL. Today, an ORACLE database instance is used to analyze how to optimize ORACLE databases from tables and data. Tsfree. SQL View This SQL statement quickly compares

During the rapid expansion of Mailbox, one of the performance problems is the MongoDB database-level write lock. the time consumed during the lock wait process directly reflects the latency during the user's service usage. To solve this long-standing problem, we decided to migrate a common MongoDB collection to an independent cluster. We can infer that this will reduce the lock wait time by 50%. At the same

Traditional SQL pagingIn traditional SQL paging, almost no row_number exists in all solutions. For scenarios that require various sorting and complex queries, row_number is a killer. In addition, the time stamp is usually used for paging loading by poll/push on the current web. These two types of pages can be said to be generic, and even the pages generated by Linq are row_number. The latter is the best both in terms of performance and complexity, bec

In the last article to introduce the MySQL database performance optimization One, today continue to go on the article to introduce the database performance optimization related knowledge. The details are as follows: Establish an appropriate index Speaking of improving database