i am creating a new site collection in sharepoint online, it shows me 5.90 GB available of 18.20 GB showing a green bar, beside that there is another section saying: 0 resources available with red bar, which is confusing. do I have resources to create new site collection or not?
"0 resources available" refers to resource quota.
The resource usage quota is a site collection metric automatically compiled by SharePoint Online. Resource usage generally includes performance data (such as processor time and unhandled exceptions) that pertain to code in sandboxed solutions. When the level exceeds the daily quota, the sandbox is turned off for the site collection. The main purpose of resource quotas is to limit the risk that custom code will negatively impact the site collection.
Usually when you create a site collection when resource quota has exceeded limit, you get error message "You have reached the maximum resource usage limit."
Refer this link to know how to increase resource quota.