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Facing parallel process block issue once in a while. Using ORACLE 12c EXADATA machine for ORACLE FCC

edited Aug 9, 2018 3:41PM in Database Tuning (MOSC) 5 commentsAnswered

Hi Guys,

Using Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production with  EXADATA for ORACLE FCCM product.

we are facing this issue once in a while, where one process will use all the parallel thread approx 400 and other process goes into hung state.

More Explanation :

- we are running 5 job in parallel with five different queries , in normal scenario all five jobs completes in 5 -10 min but  we face this issue where sometime 1 process will use all parallel threads and all five jobs goes in wait state and runs forever like more the 10 hours

but interesting thing is ,If we kill these process and rerun same jobs again, then everything  will be finished with in 5 -10 min.

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