查看连接用getSessionMemoryStat函数，清除连接用closeSessions函数。以下函数可清除集群中超过N小时不活跃的连接，供参考：
/* *
* @ brief This function is used to close inactive sessions.
* @ param
* hours determines the interval (in hours) after which a session is determined as inactive. The default value is 12.
* @ Return a table of the active connections
* @ sample usage closeInactiveSessions(24)
*/
def closeInactiveSessions(hours=12) {
sessionIds = exec sessionId from pnodeRun(getSessionMemoryStat) where now() - lastActiveTime > long(hours*60*60*1000)
pnodeRun(closeSessions{sessionIds})
return pnodeRun(getSessionMemoryStat)
}