I use MRTG to monitor my simple queues, using assigned OIDs I found via /queue simple print oid.
Will these OIDs change after reboot?
How about after reinstalling MT and loading my binary config backup?
Reboot won’t disturb simple queue monitoring.
I’m not sure about reinstall,
but if you will reload the same configuration, than there should be any problems (however, it’s not so hard to change MRTG server configuration) 
can u tell me how to set inmrtg server 
, i’ve problem with it 
thx,