AW: AW: OpenJPA (with slice) multithreaded scaling issues

[Michael Pflueger <Mi...@sma.de>]

Hi,
are there any news about this issue?
Should I open a bugreport about this?

Michael

-----Ursprüngliche Nachricht-----
Von: Michael Pflueger [mailto:Michael.Pflueger@sma.de] 
Gesendet: Dienstag, 13. September 2011 18:58
An: users@openjpa.apache.org
Betreff: AW: AW: OpenJPA (with slice) multithreaded scaling issues

Right.
Attached is a my test project again, this time including a threaded test (FetchThreadedJpaTest).
My Observations are, that the two threads block each other when using slice and accessing the same single slice(I have not tested accessing different slices).
When you use the "openjpa" persistence unit instead of the "slice" unit, the two threads do NOT block each other but run happily at the same time, and the whole program runs about twice as fast.

So it seems slice is the issue here that's causing this blocking.

Michael

-----Ursprüngliche Nachricht-----
Von: Pinaki Poddar [mailto:ppoddar@apache.org]
Gesendet: Dienstag, 13. September 2011 18:51
An: users@openjpa.apache.org
Betreff: Re: AW: OpenJPA (with slice) multithreaded scaling issues

Michael,
  1. openjpa.Multithreaded=false -- right?
  2. A single user thread is accessing each entity manager -- right? That is no entity manager is being accessed by more than one concurrent thread. 


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Pinaki Poddar
Chair, Apache OpenJPA Project
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