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Which is the best way to archive MySQL tables data?
INSERT INTO db2.History SELECT * FROM db1.Current WHERE That would copy rows from one table in one database to a table in another database. However partitioning and using “transportable tablespaces” to move on partition would be a lot faster. (My opinion:) 3 million rows (86th percentile) in a month is “medium” sized.
How big is the unused database in MySQL?
One issue, however, was overlooked prior to our communications, was that of keeping around unused databases. There was around 15 gigabytes of unused MySQL data – a mix of MyISAM and Innodb tables – for which the server had not been tuned for.
How to reduce data size in MySQL database?
As promised, here are some quick MySQL tips relating to data size management: Backup, backup, backup! Before making any of the recommended changes, backup all DBs and tables in question. Drop unused databases. Drop or prune unused tables and/or old and unnecessary data.
Do you need to delete unused data from a database?
Although unused data may not fill your server’s memory in an instant, it’s quite possible over time and will certainly be the case if you keep your development database on the same server. Another optimization in this area would be to delete unused data from specific tables. This means even on active databases, you would want to prune old data.
Do you need to archive data in SQL Server?
The time window for this database (or table structure) determines what data are stored and no archiving is necessary, as we can simply backup and restore the database on a separate server if we need to migrate the data. This is a popular technique for storing data – data come from an application or ETL layer into a database.
Is there a time window for archiving a database?
Because there’s a time window, the databases do not grow like in Scenario 1. The time window for this database (or table structure) determines what data are stored and no archiving is necessary, as we can simply backup and restore the database on a separate server if we need to migrate the data.
How to archive SQL Server data with scale in mind?
This designs for scale immediately. Data come from an application or ETL layer and enter a database designed for that partition of data, such as that year when the data originated or a partitioned key like a geographical area. Outside of moving the databases, no archiving is necessary.
How to enable InnoDB file per table in MySQL?
Enable the innodb_file_per_table variable to put the data and indexes for individual tables into separate files instead of the system tablespace. This setting is required to use other features, such as table compression. The innodb_file_per_table variable is enabled by default.
Which is the Best Reference Manual for MySQL 5.6?
MySQL 5.6 Reference Manual / / This section describes best practices when using InnoDB tables. Specify a primary key for every table using the most frequently queried column or columns, or an auto-increment value if there is no obvious primary key.
Do you use lock tables statement in InnoDB?
Do not use LOCK TABLES statements. InnoDB can handle multiple sessions all reading and writing to the same table at once without sacrificing reliability or high performance. To get exclusive write access to a set of rows, use the SELECT FOR UPDATE syntax to lock just the rows you intend to update.