|Range of values||0 to 4294967295 (4 GB -1)|
|Real Application Clusters||Multiple instances can have different values.|
OPEN_LINKS_PER_INSTANCE specifies the maximum number of migratable open connections globally for each database instance. XA transactions use migratable open connections so that the connections are cached after a transaction is committed. Another transaction can use the connection, provided the user who created the connection is the same as the user who owns the transaction.
OPEN_LINKS_PER_INSTANCE is different from
OPEN_LINKS, which indicates the number of connections from a session. The
OPEN_LINKS parameter is not applicable to XA applications.