Zoho Creator imposes limits on the total number of records that can be maintained per account and the total size of the file uploads and attachments. These limits differ with each subscription plan and can be increased by purchasing add-ons. There is also usage limits on the number of statements that can be executed when a deluge action (like "on load") or a function is invoked and also on the number of mails that can be sent, number of records that can be added, number of times you can post data to another website per day.
The view your Usage Limit page:
The total number of records that can be maintained per account depends on your subscription plan. For example, if you have subscribed to the Standard Edition, the total number of records that can be maintained is 10000. If you want to store more number of records, you can purchase additional 5000 records at $10 per month as add-ons.
The total size of file uploads and attachments per account depends on your subscription plan. For example, if you have subscribed to the Standard Edition, the total size of File uploads allowed is 1 GB. If you want to upload more files, you can purchase additional 500 MB at $10 per month as add-ons.
If you are using the default SMS connection, you have to purchase SMS credits as add ons at 50 SMS Credits at $10/month. The Usage limit -> Add-ons page lists the total number of sms credits applicable for the month, the number of sms executed and the balance remaining.
Based on your Subscription plan, there is a limit on the number of schedules that can be executed in Zoho Creator. The limit is for the total number of schedules executed per month. The Usage limit -> Schedules page lists the total number of schedules applicable for the month and the number of schedules executed/terminated. The Open Log Details link gives you the complete usage details of the schedules for the month.
The usage limits for Deluge Statements is also available in the Usage Limit tab of the Account Settings dialog as shown in the above screen-shot. You can also refer the topic Deluge Reference -> Usage Limitation for more information.