mysql query cache size

The following statement can be used:Query_cache_size = 268435456Query_cache_type = 1Query_cache_limit = 1048576Stored under [mysqld] of the/etc/my. cnf FileThen restart the mysql database.Service mysqld restartMysql Cache is enabled. In use, the query cache stores the text of a SELECT

Mysql Query CacheThe purpose of the query cache is that when a query receives the same query as before, the server will retrieve the results from the query

MySQL query cache has crashed today, and a large number of online waiting on query cache mutex So what is query cache? QC caches the entire select result set, rather than the e

Summary 1: About MySQL table data size, we know that mysql stores data files in tablespaces. when mysql uses the innodb Storage engine, mysql uses tables to store data points. Summary 1: About MySQL table data

MySQL query database size Step 1: First open the Mysql Command line and choose Start Menu> program> MySql-Command line client, as shown in Figure 1-1: Figure 1-1 Step 2: Enter use information_schema 1-2 in the command: Figure 1-2 Step 3: view the

Solution to querying cache questions in mysql5.6.13: bitsCN.com Solutions to the cache query questions in mysql5.6.13 I have raised a question before. It is the same configuration, and qcache issues vary with versions. I have been reading High-Performance mysql (version 2) these two days. I checked it again t

Query with binary keyword can be in the query to distinguish the character size as follows:Mysql> select name from PE where binary name= ' claws ';+-------+| name |+-------+| Claws |+-------+Mysql> select name from PE where binary name= ' claws ';Empty Set (0.00 sec)Use of the like condition:Mysql> select name from PE

Each MySQL has a library information_schema, which has a table tables stores information about all database tables, so you can see the database size and table size from this tableQuerying database sizeSelectConcatround((sum(data_length)+sum(Index_length))/1024x768/1024x768/1024x768,2),'GB') asData fromInformation_schema.tableswhereTable_schema='ESB';Querying the

Tags: pros and cons MySQL client information benefitsQuery Cache principleWhen MySQL receives a select type of query, MySQL hashes the query to get a hash value and then matches the hash value to the

. Key_buffer_size = 536870912 Read_buffer_size = 4194304 Max_used_connections = 1 Max_threads = 1500 Threads_connected = 1 It is possible that mysqld cocould use up Key_buffer_size + (read_buffer_size + sort_buffer_size) * max_threads = 12827463 K Bytes of memory Hope that's OK; if not, decrease some variables in the equation. Thd: 0x259d70b0 Attempting backtrace. You can use the following information to find out Where mysqld died. If you see no messages after this, something wen

This article is mainly to share with you PHP implementation query MySQL and cache to Redis method, hope to help everyone. First install Redis and open the Php_redis extension in a PHP environment. Not much to say, directly on the code

The query cache of the MySQL server is enabled. The following command is used to view the query cache parameters: # Whether to enable the current featureSelect @ query_cache_type;# Current application or notShow variables like 'have _ query_cache ';# The

Query the disk space used by all databases in mysql and the size of all tables in a single database SQL code www.2cto.com select TABLE_NAME, concat (truncate (data_length/1024/1024, 2), 'mb') as data_size, concat (truncate (index_length/1024/1024, 2), 'mb') as index_size from information_schema.tables where TABLE_SCHEMA = 'wxsj _ user' group by TABLE_NAME order b

Tags: style class tar C http widthMySQL Query execution processQuery Process : The client sends a query to the server; The server checks the query cache first, and returns the results stored in the cache immediately if the c