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Oracle® Database Reference
10g Release 1 (10.1)

Part Number B10755-01
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Property Description
Parameter type Integer
Default value 4
Modifiable No
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.

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