I am going to upgrade my SLT from DMIS 2011 SP09 to ...SP13, the e latest, will I need to delete triggers/ logging tables and reload after completing the upgrade or is the option of SUSPENDING or simply stopping replication the answer? Also, is the a Guided process document for upgrades
I would like to remind you, that SLT support the landscapes where version DMIS installed on source server is not less as 3 versions of SLT central server. For example if you have central server with SP13 then your source system must have at least SP10 (ok, with SP10 it's a bad example becasue SP9 = SP10, but I hope you got the idea :))
We just upgraded from SP9 to SP12, and this went without any issues at all.
Just remember to stop the replication and jobs, that's what we did.
We did also re-generate the runtime modules and objects for our bigger tables, and the performance is better. You have to re-generate the objects if you want to make use of the improvements.
Remember to upgrade the DMIS in the source system as well.