innobackupex increase database size


Can you help me with my problem.

I use this command line to backup my 500Gb database (INNODB).
innobackupex --user=$BDD_LOGIN --password=$BDD_PASSWORD --compress $LATEST_DIR --compress-threads=4 --parallel=2 --no-lock

My problem is everyday after each backup I noticed an increase of 5Gb on my databasesize. Can you explain why?
I did not have this problem with regular mysqldump.

I assumed it may have something to do with fragmentation because I did not start my database with innodb_file_per_table options but I am not sure.



I just find out ibdata1 cannot be fragmented. So I have absolutely no idea why my database keep growing after each backup.

Hi tdelnatte, could you give me the version of xtrabackup you are using and your MySQL version? Is the increase noticable only on ibdata1 and if so, you are talking about a sudden increase (autoextend) of the ibdata file?