The maximum size of data that can be stored in Memcached depends on several factors, including the configuration of Memcached servers and the available system resources. However, there are some general guidelines to consider:

* Memory Limit : Memcached stores data in memory, so the maximum size of data that can be stored is limited by the amount of available memory on the Memcached servers. Each Memcached server allocates a certain amount of memory for caching, which is specified in the server configuration.

* Item Size Limit : Memcached imposes a limit on the size of individual items that can be stored in the cache. By default, this limit is set to 1 megabyte (MB) per item. However, this limit can be adjusted by configuring the item_size_max parameter in the Memcached server configuration.

* Total Cache Size : The total size of data that can be stored in Memcached is determined by the combined memory limits of all Memcached servers in the cluster. As you add more servers to the cluster, the total available cache size increases, allowing you to store more data.

* Efficient Use of Memory : It's important to note that Memcached is optimized for caching small, frequently accessed items rather than large objects or datasets. Storing large objects in Memcached can lead to inefficient memory usage and reduced performance.