It's an internal repository for persistent storage. It contains persisted configuration information about the server itself and its applications. It also contains the persisted data from the applications.
The Mule Runtime did, it needs it for its own working
No. The Runtime needs these files for the proper working of it and the applications. If you delete these contents, functionality will be affected.
Persisted data tied to apps is not deleted when they are undeployed. If you undeployed to deploy a new application version, or just by mistake, you wouldn't like the data you were working with lost.
Under usual circumstances, never. This is an internal directory and not designed to be customizable. You should only alter its contents following the instructions of our Support Team or a piece of our documentation. If you think you should change or delete some file here but are not following our advice, please reach out to us first.
001118518

We use three kinds of cookies on our websites: required, functional, and advertising. You can choose whether functional and advertising cookies apply. Click on the different cookie categories to find out more about each category and to change the default settings.
Privacy Statement
Required cookies are necessary for basic website functionality. Some examples include: session cookies needed to transmit the website, authentication cookies, and security cookies.
Functional cookies enhance functions, performance, and services on the website. Some examples include: cookies used to analyze site traffic, cookies used for market research, and cookies used to display advertising that is not directed to a particular individual.
Advertising cookies track activity across websites in order to understand a viewer’s interests, and direct them specific marketing. Some examples include: cookies used for remarketing, or interest-based advertising.