reapIntervalSeconds

60

Specifies the number of seconds between checks for expired sessions. 

Setting this value lower than the frequency at which session data changes is recommended. For example, this value should be as low as possible (1 second) for a hit counter servlet on a frequently accessed web site, or you could lose the last few hits each time you restart the server. 

maxSessions

-1 

Specifies the maximum number of active sessions, or -1 (the default) for no limit.