nimble storage comparison

. If you need to perform a large number of insert or update operations in your app, you should use InnoDB, which can improve the performance of multiple user concurrency operations. Common commands: (1) View the storage type of table (three kinds): Show CREATE TABLE TableName Show table status from DBName where Name=tablename Mysqlshow-u user-p password--status dbname tablename (2) Modify the table's

performance of multiple user concurrency operations. Common commands: (1) View the storage type of table (three kinds): Show CREATE TABLE TableName Show table status from DBName where Name=tablename Mysqlshow-u user-p password--status dbname tablename (2) Modify the table's storage engine: ALTER TABLE TableName TYPE=INNODB (3) Add the following parameter to the

Tags: large storage engine It's isolated MySQL mysql store scan date logInnoDB engineThe InnoDB is a transactional storage engine designed to provide high-performance services when processing large amounts of data, which, at run time, creates buffer pools in memory for buffering data and indexes.InnoDB Engine Benefits1. Support transaction processing, acid transaction characteristics;2. The implementation o

-22 16:33:26Myisam_nt count:10000 used time:2.1132440567Myisam_ts 04-10-22 16:33:26Execsql:begin;Execsql:commit;04-10-22 16:33:29Myisam_ts count:10000 used time:2.65475201607INNODB_NA_NB 04-10-22 16:33:29Execsql:set autocommit = 004-10-22 16:33:31INNODB_NA_NB count:10000 used time:2.51947999001Innodb_na_be 04-10-22 16:33:31Execsql:set autocommit = 0Execsql:begin;Execsql:commit;04-10-22 16:33:35Innodb_na_be count:10000 used time:3.85625100136INNODB_AU_NB 04-10-22 16:33:35Execsql:set autocommit =

: MyISAM can check and repair operations manually or automatically, but not crash recovery. InnoDB to some extent support for data loss recovery at crash time, but not absolute recovery, and long recovery time Backup: If you need to shut down the server to perform a backup, the backup policy can be ignored. However, the need for online hot backup, InnoDB is better to choose the Conversion engine, there are three ways 1:alert Table statement: alert table mytable engine=innodb; This method

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. Later, I guessed that the difference should not be so slow. It was estimated that there was a

in this, in IO.The IO units of the DB are data pages (8192 bytes) (multiple rows of data are stored on one page, and data rows cannot be spread across pages.) Of course image,text, etc.).So the more rows in a page, the better the performance. So it boils down to the front question.Legacy issue: Does varchar cause issues such as paging, for frequently updated tables? Degree of impactOn the search, even if the index is not considered, char is fixed-length, moving to the next record, only need to

Performance Comparison of various mysql storage engines bitsCN.com 1. test environment: Cpu: 2 GHZ Memory: 2 GB Lan Open a persistent connection to construct random query conditions. 2. test results Data Volume: 88171 Qps: query per second Engine type Domain name Cache (qps) No cache (qps) InnoDB Innodb.Abc.com 7125.467573 11.127103 MyISAM Myisam.Abc.com 7121.769949 15.163067 BDB Bdb.Abc.com 7359.63

Show create table 20130107date;CREATE TABLE ' 20130107date '(' id ' int( One) not NULLAuto_increment,' C_date ' timestamp not NULL DEFAULT Current_timestamp,' C_date_long ' int( -) not NULL,' Idx_date ' timestamp not NULL DEFAULT ' 0000-00-00 00:00:00 ',' Idx_date_long ' int( One) not NULL,PRIMARY KEY(' id '),KEY ' 20130107date_idx_date '(' Idx_date '),KEY ' 20130107date_idx_long '(' Idx_date_long ')) Engine=innodbThere are 90w of data, which are random times.See full table scan without index

In-depth explanation of MySQL storage engine comparison bitsCN. comMyISAM is the default storage engine of MySQL. MyISAM does not support transactions or foreign keys, but it has fast access speed and has no requirements on transaction integrity. The InnoDB storage engine provides transaction security with commit, rol

is 1024. When you want to make sense for more than max_sort_length bytes, another way to use a group by or order by for a BLOB or text column with a Long value is to convert the column value to a fixed-length object. The standard method is to use the SUBSTRING function. The maximum size of a blob or text object is determined by its type, but the maximum value that can actually be passed between the client and the server is determined by the amount of available memory and the size of the communi

transparent gateway of Oracle.Back to the top Maria storage engineThe Maria storage Engine is a newly developed engine designed to replace the original MyISAM storage engine and become the default storage engine for MySQL.Last but not least, although MySQL has a lot of storage