Hi,
As issue starts with innodb compression, our primary focus can be that but I couldn’t find any well known bug related to Innodb compression and memory leak. I would suggest to read these links about how compression works and how to tune it. It might helpful to you.
[url]https://dev.mysql.com/doc/innodb/1.1/en/innodb-compression-internals.html[/url]
[url]https://dev.mysql.com/doc/innodb/1.1/en/innodb-compression-tuning.html[/url]
You can also check memory usage with Valgrind massif, mentioned here. [url]http://www.mysqlperformanceblog.com/2014/01/24/mysql-server-memory-usage-2/[/url]