I am using SOLR 4.5, want to set waitSearcher=false commit=false on SOLR server while doing SOLR indexing

Requirement - I am using SOLR 4.5, want to set waitSearcher=false commit=false on SOLR server while doing SOLR indexing
Implemented approach but not working
1) <requestHandle name="/update" class="solr.UpdateRequestHandler" default="true">
<lst name="defaults" default="true" >
<bool name="waitSearcher">false</bool>
</lst>
</requestHandler>

2) <updateHandler class="solr.DirectUpdateHandler2">
<commit waitSearcher="false"/>
<optimize><waitSearcher>false</waitSearcher></optimize>
</ updateHandler>

3) Also try to pass as request hander parameter
http://localhost:8983/solr?waitSearcher=false

Above three implemented approach not working, can you please suggest me any alternative approach OR I missed something, kindly suggest me.