Application waits for a responce from the DB ...

Question

Hi friends,
I have a multi threaded .NET application that interacts with ORACLE 10g DB.
When the multi thread is executing for less than 4hrs continuously there is no problem, but if it continuous execution for more than 5hrs the application doesn't respond.
To track the problem i have followed the standard logging process i.e. to a file. When i analyzed the file i could see the application sending a request to the DB and waits for the reply, but the server doesn't reply.
One thing to be looked in is that the same piece of code was execution for 5hrs.
I have no idea of this behavior, some one please help me out ...

Answer 1

Hi Pierre Forstmann,
I am not a ORACLE DBA expert but managed to get some information,
Error message in database alert log file.
Alert_<DB_NAME>.log
ORA-1654: unable to extend index SYSMAN.MGMT_SYSTEM_PERF_LOG_IDX_01 by 8 in tablespace SYSAUX
There are no queries waiting on DBA_WAITERS or DBA_BLOCKERS.
The application is executing PL/SQL statement (Procedure, Functions).
Four tables are related to this process.
Initial Count
T1 - 0 Records
T2 - 0 Records
T3 - 0 Records
T4 - 0 Records
Count after 4-5 hrs of execution
T1 - 38269 Records
T2 - 654818 Records
T3 - 992579 Records
T4 - 4422 Records
I have identified the session that is used by my code from V$SESSION.
Initially when i issued the below select statement:
SELECT status,state,wait_time,seconds_in_wait FROM V$SESSION WHERE USERNAME = 'XXX';
STATUS;STATE;WAIT_TIME;SECONDS_IN_WAIT
INACTIVE;WAITING;0;1377
ACTIVE;WAITED SHORT TIME;-1;2
ACTIVE;WAITED SHORT TIME;-1;0
INACTIVE;WAITING;0;1
INACTIVE;WAITING;0;1377
INACTIVE;WAITING;0;1377
INACTIVE;WAITING;0;1377
INACTIVE;WAITING;0;1377
INACTIVE;WAITING;0;4
INACTIVE;WAITING;0;1377
Yes, The data in V$SESSION changes over time.
After 5 Min interval
INACTIVE;WAITING;0;1496
ACTIVE;WAITED SHORT TIME;-1;2
ACTIVE;WAITED SHORT TIME;-1;5
INACTIVE;WAITING;0;2
INACTIVE;WAITING;0;1496
INACTIVE;WAITING;0;1496
INACTIVE;WAITING;0;1496
INACTIVE;WAITING;0;1496
INACTIVE;WAITING;0;0
INACTIVE;WAITING;0;1496
After 2 Min interval
INACTIVE;WAITING;0;1452
INACTIVE;WAITING;0;0
INACTIVE;WAITING;0;0
INACTIVE;WAITING;0;0
INACTIVE;WAITING;0;1452
INACTIVE;WAITING;0;1452
INACTIVE;WAITING;0;1452
INACTIVE;WAITING;0;1452
INACTIVE;WAITING;0;5
INACTIVE;WAITING;0;1452
After 1 Min interval
INACTIVE;WAITING;0;1751
ACTIVE;WAITED KNOWN TIME;2;0
ACTIVE;WAITED KNOWN TIME;1;1
INACTIVE;WAITING;0;7
INACTIVE;WAITING;0;1751
INACTIVE;WAITING;0;1751
INACTIVE;WAITING;0;1751
INACTIVE;WAITING;0;1751
INACTIVE;WAITING;0;1
INACTIVE;WAITING;0;1751
After 4-5 hrs of execution and when the application was waiting for the reply from the DB server i issued the same select statement.
Result is : No rows returned.
I would like to know what would be the reason that all the 10 session have disappeared from V$SESSION.