Sessions currently waiting and for how much time

Query v$session for

WAIT_TIME

A nonzero value is the session's last wait time. A zero value means the session is currently waiting

0 - the session is currently waiting
-2 - duration of last wait is unknown
-1 - last wait was <1/100th of a second in duration >0 - duration of last wait in 1/100th second units (10mS)
<-2 - The internal time has probably wrapped SECONDS_IN_WAIT

When WAIT_TIME = 0 then this shows the number of seconds spent in the current wait

Note: We need to check Wait_Tiem = 0 - implies that sessions are waiting currently waiting and Seconds-In_Wait will specify how much time current session is waiting.

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