The problem has been resolved by support.

changing default HTTP,SOAP to SOAP,HTTP makes my retain system be 10-15 times faster with SSL.

vi /opt/beginfinite/retain/RetainWorker/WEB-INF/classes/config/attachment.properties
# This properties file belongs to the Worker.
# --------------------------------------------------------
#attachment.handler.list= HTTP,SOAP
attachment.handler.list= SOAP,HTTP

I had a customer make this change yesterday and they went from 1.2 m/s to 6.33 m/s with SSL enabled.  I wish it had the very high m/s performance when SSL is disabled on SOAP.

Ed, maybe a crazy idea but I tried it.

I have created a second POA in my test environment. This new POA has been configured with insecure SOAP.

Afterwards I had to re-configure my Retain GroupWise Module.

And my Worker1.

Now I use secure SOAP for GMS and web client but insecure SOAP for Retain ... 

I am excited to see what your new m/s throughput will be.  My guess is 40 m/s.

I am excited to see what your new m/s throughput will be.  My guess is 40 m/s.

Unfortunately I did not really monitor - this test environment is small and does not deliver usable values. My approach was more or less just a trial to find out how easy and fast it is to follow this new idea.

(my test environment is good old Utopia - I think you remember Utopia .. )