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What to do when MySQL is out of disk space?
Another way to perform a defragmentation operation is to use mysqldump to dump the table to a text file, drop the table, and reload it from the dump file. Ultimately, we can also use DROP TABLE to remove the unused table or TRUNCATE TABLE to clear up all rows in the table, which consequently return the space back to the OS.
Why is my system disk running out of space?
I’m trying to run a SELECT query against a database table of 136898115 lines. This SELECT query only has a simple WHERE clause. Every time I run this query, it fails because the system disk (the partition where Windows is installed – C:\\) run out of space (this partition has only 6GB free space), and I don’t understand why.
How to check disk space in SQL Server?
CLR, PowerShell, WMI, etc. also have options to check for disk space, so do what makes sense for your code and environment. Jeremy Kadlec is the Co-Founder, Editor and Author at MSSQLTips.com, CTO @ Edgewood Solutions and a six time SQL Server MVP.
Why does MySQL not give back space after deleting columns?
EDIT: Doesn’t apply without file_per_table, Mark is right there. What’s going on is that once MySQL takes space, it won’t give it back. This is so that if you delete 500 rows and then immediately insert 500, it doesn’t have to give that space back to the file system and then request it back.
Can a table cause disk exhaustion in MySQL?
In some particular cases, you can have disk exhaustion and server outage. As any other InnoDB table in the database, the temporary tables have their own tablespace file. The new file is in the data directory together with the general tablespace, with the name ibtmp1.
How to reduce disk space exhaustion for implicit temporary tables?
Stepping back to MyISAM, you will considerably decrease the possibility of completely filling your disk space. In fact, the temporary tables will be created into different files and immediately dropped at the end of the query. No more issues about a forever increasing file.
Where is MySQL located on the disk?
First of all, we have to determine which disk partition is full. MySQL can be configured to store data on different disk or partition. Look at the path as stated in the error to start with. In this example, our directory is located in the default location, /var/lib/mysql which is under the / partition.
How to reduce the size of ibdata1 in MySQL?
MySQL doesn’t reduce the size of ibdata1. Ever. Even if you use optimize table to free the space used from deleted records, it will reuse it later. An alternative is to configure the server to use innodb_file_per_table, but this will require a backup, drop database and restore.
How to reclaim disk space after deleting data from table?
There are several ways to reclaim diskspace after deleting data from table for MySQL Inodb engine If you don’t use innodb_file_per_table from the beginning, dumping all data, delete all file, recreate database and import data again is only way ( check answers of FlipMcF above )