User session connected to forms freq get inactive in oracle

Hi
we are having oracle 10.2.0.3 on aix 5.3 RAC environment. we are having monitor database scripts to check how the session and how many long running sessions are there like this? but on last few days we found that suddenly out of two nodes one node only got session increasing(long running session) on the next node is normal and if we found most of the session were goes into inactive that too especially those who are connected to the oracle forms
terminal. i took awrrpt.sql but i m not much familiar to find the exact reasons from that report i just look the sql queries but i could not find any difference due to the query ? i m thinking of some of the questions
1.) why the sessions goes inactive when they are connected to forms?
I know its very strange thing of asking questions to someone abt my environment but i just want to know from anybody that they might had this issue earlier.
Now after looking that thing what i understood from my knowledge is
1.) Sessions more inactive
2.) esp. for forms
3.) that too on one node most freq.
4.) is this problem due to any recent time deployment on production from forms?
Pls anybody guide me ...
Thanks
M.Murali..

Hi
thanks for prompt reply.yeah these are situations but i cant predict how come all of suddenly goes into inactive session and there is no sql_id is also there to want to find where it get strucks? but someday when user logged complaints like when they are click one button it goes hangs.At tht time i traced his/her sessions from backend there is query which works fine in backend(database level) but when i m monitoring couldn't find any sql is so i dont know is the real problem with database or what?
Thanks
M.Murali..

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SQL statements were found waiting for row lock waits.
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Estimated benefit is 145.22 active sessions, 99.77% of total activity.
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The SQL statement with SQL_ID "974vg65j29pmv" was blocked on row locks.
Related Object
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Analysis Period
AWR snapshot range from 5003 to 5004.
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Time period ends at 08-JUL-13 12.00.45 PM
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Database 'AVAYADB' with DB ID 2878789264.
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1 Row Lock Waits      155.44 | 99.88       1
2 Top SQL Statements 26.67 | 17.14        1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          Findings and Recommendations
Finding 1: Row Lock Waits
Impact is 155.4 active sessions, 99.88% of total activity.
SQL statements were found waiting for row lock waits.
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      Significant row contention was detected in the TABLE
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      The SQL statement with SQL_ID "974vg65j29pmv" was blocked on row locks.
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         SQL statement with SQL_ID 974vg65j29pmv.
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Impact is 26.66 active sessions, 17.14% of total activity.
SQL statements consuming significant database time were found. These
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          Additional Information
Miscellaneous Information
Wait class "Commit" was not consuming significant database time.
Wait class "Concurrency" was not consuming significant database time.
Wait class "Configuration" was not consuming significant database time.
Wait class "Network" was not consuming significant database time.
Wait class "User I/O" was not consuming significant database time.
Session connect and disconnect calls were not consuming significant database
time.
Hard parsing of SQL statements was not consuming significant database time.

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