SharePoint quota email has empty data

When SharePoint site collection exceeds the quota limit it sends the email to the owner. But in our environment the email has URL to _layouts/usage.aspx where the data are all empty. But the web analytic report has all data populated.

After research found out the there are 2 timer jobs for the usage analysis. 1) for data gathering and other for data processing. For some reason our processing time job email was disabled.

In Central Administration, on the Home page, click Monitoring.

On the Monitoring page, in the Reporting section, click Configure usage and health data collection.

On the Configure usage and health data collection page, in the Usage data collection section, enable usage data collection by selecting the Enable usage data collection text box.

In the Event Selection section, select the events to log by selecting the check box next to the events in the Events to log list

In the Usage data collection settings section, type the path of the folder you want usage and health information to be written to in the Log file location box. The path that you specify must exist on all farm servers.

Type the maximum disk space for the logs in gigabytes (between 1 and 20 GB) in the Maximum log file size box.

In the Health data collection section, select the Enable health data collection check box. To change the collection schedules, click Health Logging Schedule. A list of timer jobs that collect health data is listed. Click any of the timer jobs to change its schedule, or disable that timer job.

ref:msdn

But the main part was on Log Collection Schedule Click the log colletion schedule it will take to the page with 2 timer jobs that I mentioned before. Activate both the jobs and run it.

Now _layouts/usage.aspx will have valid data in it.