NonStop Servlets for JavaServer Pages (NSJSP) 5.0 System Administrator's Guide

Configuring NSJSP
NonStop Servlets for JavaServer Pages (NSJSP) System Administrator’s Guide—525644-003
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Configuring the Manager for Sessions Support
algorithm
Name of the message digest algorithm that calculates the session identifiers it
generates. The java.security.MessageDigest class must support this value.
The default is MD5.
checkInterval
The number of seconds between checks for expired sessions. The default is 60
seconds.
className
The Java class name of the implementation to use. Specify
com.tandem.servlet.catalina.session.NSJSPPersistentManager.
debug
The debug level for messages logged to the associated logger. Higher numbers
generate more detailed output. The default is 0 (zero).
entropy
A string value used when seeding the random-number generator that creates
session identifiers. If this attribute is not specified, a semi-useful preset value is
used. For a security-conscious environment, use a long string value.
maxActiveSessions
The maximum number of active sessions that can be created. The default is -1 for
no limit or unlimited active sessions.
If this value is 0 (zero) or greater and too many active sessions exist, some active
sessions will be swapped out. The minIdleSwap attribute limits the sessions
being swapped out. Setting the minIdleSwap value to 0 (zero) means that
sessions are always swapped out after use, but slows performance. However, if
minIdleSwap is too low, sessions may not be created.
If you change the value of maxActiveSessions, ensure that value and the
minIdleSwap value are configured according to the amount of session-based
traffic this server is expected to receive. The recommended setting is -1.
maxIdleBackup
The interval (in seconds) a session must be idle (time since last access to the
session) before it can be persisted to the session store. The default value of -1
disables this feature. Note however that the maxActiveSessions,
minIdleSwap, and maxIdleSwap parameters could override this parameter
value and swap out a session before it reaches its maximum idle time interval. If
this feature is enabled, the interval specified here should be less than the value
specified for maxIdleSwap.