Hi there thanks for the question. There are quite a few blog posts on this subject, here is one that explains what might be happening: [url]https://www.percona.com/blog/2013/08/20/why-is-the-ibdata1-file-continuously-growing-in-mysql/[/url]
Also this one [url]https://www.percona.com/blog/2013/09/25/how-to-reclaim-space-in-innodb-when-innodb_file_per_table-is-on/[/url]
If these don’t fit your scenario, please come back with version and environment details, plus any error logs that you might have…?