How does Oracle handle inactive sessions?
Just before the oracle executable executes a read to get the next “command” that it should execute for its session, it will set its session’s state to INACTIVE . After the read completes, it will set it to ACTIVE . It will remain in that state until it is done executing the requested work.
How do you kill a user session in Oracle?
Identify the correct session and terminate the session by performing the steps below:
- Invoke SQL*Plus.
- Query V$SESSION supplying the username for the session you want to terminate: SELECT SID, SERIAL#, STATUS, SERVER.
- Execute the ALTER SYSTEM command to terminate the session: ALTER SYSTEM KILL SESSION ”
What is Oracle sniped session?
Answer: An Oracle session is sniped when you set the idle_time parameter to disconnect inactive sessions. Oracle has several ways to disconnect inactive or idle sessions, both from within SQL*Plus via resources profiles (connect_time, idle_time), and with the SQL*net expire time parameter.
What causes inactive sessions Oracle?
It just means that someone is logged in but not executing SQL right at that instant. Your very own session is “INACTIVE” everytime you are in the process of typing in a query via sqlplus. It is a normal state to be in.
What is stale session Oracle?
Stale sessions are those who are inactive since long time.
Can not kill current session?
ORA-00027: cannot kill current session , error comes, when you are trying to kill your current session,which is not allowed. EXAMPLE: Get the sid and serial# for the current session. Now open another fresh session and run the ALTER SYSTEM KILL statement, it will execute successfully.
Why does a sniped session not disappear from V session?
When IDLE_TIME is set in the users’ profiles it will kill the sessions in the database if user is idle for more than IDLE_TIME specified and status in v$session now becomes SNIPED.
What to do with a sniped session in Oracle?
A sniped session is marked for eventual killing by the PMON background process, but in the meantime, the sniped session still exists as a Oracle session and for dedicated sessions (non shared servers), a sniped session has an OS PID that can be seen with a “ps –ef|grep” command.
What does’sniped’status in V$ session mean?
When IDLE_TIME is set in the users’ profiles or the default profile. This will kill the sessions in the database (status in v$session now becomes SNIPED) and they will eventually disconnect. It does not always clean up the Unix session (LOCAL=NO sessions).
How to disconnect an idle session in Oracle?
Oracle has several ways to disconnect inactive or idle sessions, both from within SQL*Plus via resources profiles (connect_time, idle_time), and with the SQL*net expire time parameter. Here are two ways to disconnect an idle session: Set the idle_time parameter in the user profile Set the sqlnet.ora parameter expire_time.
Which is the best book for Oracle tuning?
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