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OpenSIPS 1.5.0 is & MemCache
The Memory Caching support from OpenSIPS wants to provide a way of caching at runtime different kind of data. These data will globally available (anywhere in the routing script) and shared between all OpenSIPS processes.
The idea is to be able to store (cache) custom values for later usage. The main purpose of this MemCache support is to reduce the number of DB queries by caching data that does not need constant update from DB. DB queries are known to be one of bottle necks in the current design (see design considerations) and MemCache support will help in avoiding unnecessary DB hits.
Find out more from the Memory Cache Tutorial.