length_required?

[coffeeCowLu]

I set --length_required=36 for filtering PE fastq file , the length of each of my reads is 150 bp but the resuts show reads too short: | 37.530764 M (63.431066%)

I want to confirm this length limit, whether it means filtering after trimming or filtering before trimming?

The results show that it seems to be filtered after trimming.