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inactive sessions in oracle databae.

Posted on 2009-04-08
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Last Modified: 2013-12-18
experts,

i am seeing more number if INACTIVE sessions in oracle. i am not sure why this inactive sessions.
i can see more sessions are belongs to one app server. i could not able to find out root cause of this problem. how do i investigate this problem. can any one help me. please let me know if you need any information/
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Question by:pavan27
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10 Comments
 
LVL 35

Expert Comment

by:johnsone
ID: 24097650
This is not a problem.  Sessions with a status of INACTIVE in V$SESSION just means they are not currently running a query.  When the session is running a query it will go to ACTIVE, then back to INACTIVE when the query finishes.
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Author Comment

by:pavan27
ID: 24098573
Experts,

Thanks for quick response. my problem is here why the sessions are in inactive even though it is not doing any activity in the DB. why session are not closing automatically after query execution is completed.?

at db side no chance to time out those sessions. we have allocated unlimited resource to that user  account which are making session in the db.

can any one help me to find why the sessions are being inactive and not flushing out from db.

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LVL 35

Expert Comment

by:johnsone
ID: 24098803
A session wouldn't close automatically when a query completes.  Coding an application to connect, run one query and disconnect is very inefficient.  A lot of time will be spent connecting to the database.
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Author Comment

by:pavan27
ID: 24099068
do you think this these inactive session are inactive due to connection is not made to oracle in proper time?
i did not understand your explanation. could you please clarify me once again.
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LVL 35

Expert Comment

by:johnsone
ID: 24099404
Normally, an application would do this:

- connect
- run a query
- wait for user input  <- Connection would show as INACTIVE here
- run a query
- wait for user input  <- Connection would show as INACTIVE here
- .....
- disconnect

It should not do this:

- connect
- run a query
- disconnect
- connect
- run a query
- disconnect
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Author Comment

by:pavan27
ID: 24198558
John,

thanks for reply. i have one question

how does i know that session is waiting for user input. is there any way to find .
if yes could you please tell me how can i get it.

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LVL 35

Expert Comment

by:johnsone
ID: 24198624
V$SESSION_WAIT will tell you what the session is waiting for.  It will most likely be SQL Net message from client, or something similar.
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LVL 1

Author Comment

by:pavan27
ID: 24558063
Hello Experts,

i have one question.

- connect
- run a query
- wait for user input  <- Connection would show as INACTIVE here

how much time session will wait for user input.
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LVL 35

Accepted Solution

by:
johnsone earned 2000 total points
ID: 24559243
Theorectically, it would wait forever.
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