Found missing +/-20GB but don't know if I can delete.

[janhuntjens]

Hey everyone,

I was missing quite a lot of space on my server. I stumbled open /opt/psa/ taking up 35G of hard disk space.
/opt/psa/tmp/ is 25G
/opt/psa/PMM/ is 9.8G
/opt/psa/var/ is 1.4G

Can I delete whatever is in the tmp directory without screwing everything up? How come a temporary folder is allowed to get so big?

Thanks in advance,
Regards,
Jan Huntjens