Be careful with dimsu, you can kill the system. Don't make a change without a test-dimsu first. If you configure the memory over 100%, you're going to have a bad day, and you won't be able to call anyone to tell them about it. It depends how the system was configured when it was installed, some systems might be at 60-70-80% memory used, easy enough to bump a few features, but some may be maxed out with default large values. If your system is already configured for maximum values, for example you might have 12000 phones when you only need 500, then some values may need to come down when others are pushed up. Dis-dimsu will show you current configuration in a easy display but it won't give you a percentage. It will show you how over configured it is though.
Ideally a GENDB is needed after dimsu changes to remove memory fragmentation but for a few, it doesn't matter. I don't make any dimsu changes without a copy-ddrsm first.