This is what I have there:

threads = 6
mining-params = mmc:av=0&aesni=on&m=4096
compact-stats = 1
print-timestamps = 0
#proxy = socks4a://127.0.0.1:9150

I had to change these 2 parameters because it was using less threads and less RAM before. But just to add after I made this change it was working until 1 week ago. Now it doesn't although everything seems to show correctly in the cmd black windows, expect there are not more shares getting accepted etc.