Why is the ibdata1 file continuously growing in MySQL?
When the ibdata1 file is growing too fast within MySQL it is usually caused by a long-running transaction that we have forgotten about. Our MySQL Monitoring Plugins includes a Nagios script that can alert you if it finds a too old running transaction.
What is ibdata1 file?
The file ibdata1 is the system tablespace for the InnoDB infrastructure. It contains several classes for information vital for InnoDB. Table Data Pages. Table Index Pages. Data Dictionary.
Where is MySQL ibdata1 file located in InnoDB?
In MySQL, when you are using InnoDB, all the tables and indexes are stored under the MySQL system tablespace. MySQL system tablespace is ibdata1, which is located under /var/lib/mysql. The single ibdata1 file contains all the tables and indexes in your MySQL database. So, if you have a big database, this file size will grow really big.
How to shrink MySQL ibdata1 size using InnoDB?
How to Shrink MySQL ibdata1 Size using innodb_file_per_table. In MySQL, when you are using InnoDB, all the tables and indexes are stored under the MySQL system tablespace. The single ibdata1 file contains all the tables and indexes in your MySQL database. So, if you have a big database, this file size will grow really big.
What makes mysql-ibdata1 grow exponentially?
Given enough transactions, rollback segments and undo logs to support REPEATABLE READs can make ibdata1 grow. INSERTs and UPDATEs to InnoDB tables with Secondary Indexes can pile up in the Insert Buffer.
How big is the file size of ibdata1?
Now, the ibdata1 file size will be around 100GB+. After few days, you deleted around 50GB worth of data from all those tables. The ibdata1 file size will not be reduced to around 50GB+, it will still stay at around 100GB+.
The answer to this question is easy. If you can still commit that query, do it. If not you’ll have to kill the thread to start the rollback process. That will just stop ibdata1 from growing but it is clear that your software has a bug or someone made a mistake.
How can I remove ibdata file from MySQL?
To do that you would need to take a full logical backup with mysqldump. Then stop MySQL and remove all the databases, ib_logfile* and ibdata* files. When you start MySQL again it will create a new fresh shared tablespace. Then, recover the logical dump.
How to limit the size of the ibdata1 file?
Some of them can be configured on Percona Server to avoid becoming too large. For example, you can set a maximum size for change buffer with innodb_ibuf_max_size or store the doublewrite buffer on a separate file with innodb_doublewrite_file.
Why is the MySQL database running so slow?
Try to solve the problem as fast as possible (commiting or killing a transaction) because you won’t be able to recover the wasted disk space without the painfully slow mysqldump process. Monitoring the database to avoid these kinds of problems is also recommended.