I am using cadence mmsim 7.2 to run my simulations. For the same netlist and save options (save all nodes), I tried ultrasim first and got the +400MB sst2 waveform file. Then I tried aps, the sst2 file became +70GB. Is there any way that I can reduce the file size? I know that in ultrasim you have the options  such as wf_filter, wf_tres to control the size of waveform file, is there a similar way that I can do it in aps/spectre ? Thanks a lot.

Thanks, Andrew. I found it in the manual.