When does an INACTIVE session disappear from V$SESSION?

[a128]

I have a front end Java application server (Resin) running which connects to my Oracle DB 8.1.7.3. I notice when I query V$SESSION, the number of INACTIVE sessions is growing. Their TADDR entry is Null so no locks are placed on objects for the inactive sessions. My question is:

When does an INACTIVE session disappear from V$SESSION?

Thanks,

[SANJAY_G]

INACTIVE does not indicate the session is terminated. It means the user is not performing any operation at this moment.

[adewri]

Originally posted by a128
When does an INACTIVE session disappear from V$SESSION?

When the session is closed.