In Strategy 10.x and newer, the default maximum number of concurrent connections that Strategy Intelligence Server can make to the metadata, is 0x0fffffff. This number is set from registry [HKEY_LOCAL_MACHINE\SOFTWARE\MicroStrategy\DSS Suite\ConnectionLimit\MetadataServer.
The metadata connections have a default Connection idle timeout of 2 minutes. That is, idle metadata connections remain cached for exactly 2 minutes after which they are dropped.
Connection lifetime for metadata connections is also a hard code value of 10 hours (600 minutes).
Maximum Connection attempt time for metadata connections is also a hard code value of 5 minutes (300 seconds)