mysql query cache size

Tags: for dem copy by including working principle standard value rdateworking principle: How the query cache works can be broadly summarized as: caching the result set and SQL statements for the select operation or preprocessing query (Note: 5.1.17 start support), a new SELECT statement or a preprocessing query stateme

SQL statement bitsCN.com used by MySQL to query the disk space used by all databases and the size of all tables in a single database SQL statement used to query the disk space of all databases: Select TABLE_SCHEMA, concat (truncate (sum (data_length)/1024/1024, 2), 'mb') as data_size,Concat (truncate (sum (index_leng

Queries the disk space used by all databases in mysql and the size of all tables in a single database bitsCN.com Query the disk space used by all databases in mysql and the size of all tables in a single database SQL code Select TABLE_NAME, concat (truncate (data_lengt

Tags: qcacheFirst, the query cache descriptionMySQL query cache is used to cache the SELECT statement we execute and the result set of the statement, and MySQL is similar to typical KV storage in the specific technical details of

Recently, when I was tuning MySQL, I felt that the query cache of MySQL was not as big as possible, Because the cache actually fails when the data table changes as follows: Including insert, update, delete, truncate, alter table, drop table, or drop database. Theref

The query cache stores the SQL statements and the corresponding results that are sent to the client. When executing the same SQL statement, MySQL server retrieves the results directly from the query cache, eliminating the need to parse and execute the SQL statements. The

Tags: blog class tar c http widthOriginal: MySQL Query cacheMySQL Query execution processQuery Process : The client sends a query to the server; The server checks the query cache first, and returns the results stored

Maybe some people just need to adjust the size of the query_cache_size to 0, you can ignore the value of the Query_cache_type parameter, it can be adjusted online anyway.Is that really the case? Let's go through the actual simulation test to know.We simulate the following scenarios:1. When initializing, the value of setting query_cache_size and Query_cache_type is 0;2, initialization, set query_cache_size = 0, but set query_cache_type = 1;3, initializ

Tags: like fit flush from a tables OBA SEL representationThe current query cache correlation parameter status can be viewed from the following SQL:SHOW VARIABLES like '%query_cache% ';The output is similar to the following:Query_cache_typeThe query cache type has 0, 1, and 23 values. 0 does not use the

MySQL Query Cache (Cache) SQL code www.2cto.com # Example MySQL config file for medium systems. # is generated by editing the mysql-5.1.37-win32 OF THE my-medium.ini, and the application and database are on one machine. # This is

sec)Mysql> ctrl-c-exit!AbortedROOT@XXXX ~# my 3003Entry Port = = 3003Welcome to the MySQL Monitor. Commands End With; or \g.Your MySQL Connection ID is 4601147Server Version:5.1.61-alibaba-3930-log Source DistributionCopyright (c), the Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark the Oracle Corporation and/or itsAffiliates.

Tags: blog http SP data log BS new asQuery cache:The result of a SELECT statement is cached, and the next time the same SELECT statement is run, the data can be returned directly, skipping parsing, execution, and optimization phases.1, the query cache will track the tables involved in the query, if the table changes, the relevant

Summary of MySQL Query table data size in linux-Linux general technology-Linux technology and application information. for details, refer to the following section. · 1. mysql table data size 1. 2. we know that mysql generally use