How to control AMS waveform data compression

Hello,

I am running a long top level AMS simulation, saving a lot of signals across multiple hierarchies. Most of the signals are used just for checking functionality, but on a few of them I want to to measure performance, so I need a descent accuracy for them. I use the Compression feature (in transient options) to reduce the output file, and it works great for the majority of the signals - database is significantly smaller. But for those few signals that I need good accuracy - the compression is removing too much of the data that I can't get the accuracy I need. I tried adjusting compvabstol / compiabstol but I see no improvement, the changes in the signals are larger than those thresholds so I'm confused to why it's not saving more points. This happens with both currents and voltages.

Is there a way to tell AMS simulator what signals not to compress? Are there any other knobs I should try?

Thanks,

Tomer