# Data Management {% hint style="warning" %} **This is the manual for older MicroStream versions (Version < 5.0).** **The new documentation (Version >= 5.0) is located at:** [https://docs.microstream.one/](https://docs.microstream.one/manual) {% endhint %} ## Where is the data of my database located MicroStream connects your application's entity graph residing in memory to a physical form of data (i.e. persistent data) to/from which entity data is stored/loaded as required. ## **What if my database is really big?** MicroStream uses the common concept of "[Lazy Loading](/2.2/data-store/loading-data/lazy-loading.md)", allowing you to define which parts of your data (entity sub-graphs) are loaded only when required instead of eagerly at startup. A few well-placed lazy references in your entity model make your application load only a tiny bit of "head" entities at startup time and load everything else later on demand. This allows the handling of arbitrarily big databases with relatively small memory requirements. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://manual.docs.microstream.one/2.2/data-store/faq/data-management.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.