How to decrease latency for hls nginx rtmp?

Question

This hls file generate by live streamer:

 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-MEDIA-SEQUENCE:0
 #EXT-X-TARGETDURATION:11
 #EXT-X-DISCONTINUITY
 #EXTINF:8.033,
  mys-0.ts
 #EXTINF:3.367,
 mys-1.ts
 #EXTINF:8.333,
 mys-2.ts
  #EXTINF:7.934,
 mys-3.ts
 #EXTINF:8.333,
 mys-4.ts

How to decrease duration of one file ts? I try to set nginx config: hls_fragment 3; hls_playlist_length 30;