Hi j4nd3r53n is it possible you are running into one of these known issues? [URL]Percona XtraBackup
Although it’s not at recovery stage, I notice a reference to the zlib library. Did you update anything in the past days? Or are there any other logs appeared? Here’s another suggestion about space [URL]Issue Navigator - Percona JIRA
You probably already realize that 5.5. is EoL (see this table [URL]https://www.percona.com/services/policies/percona-software-platform-lifecycle[/URL]) so we’d very much encourage you to look at upgrading ASAP. We’re also deprecating innobackupex…