/tmp folder full

Hi

Cyberpanel 1.9 on Centos 7 /tmp folder 1.5/g %100 full

How can I enlarge it or can I just delete everything in the folder?

It seems like lshttpd folder creates so many core.xxxx files with high volume even I delete those automatically repopulates.

Let me know if you have any idea how to fix it or increase the /tmp folder.