Setting max number of connections

[Sir Gilligan]

I am trying to increase the max number of connections allowed for query 
with Solr Cloud.

I have searched around and found mention that:
max number of connections is 128
max number of connections per host is 32
I start solr in the example directory with some options, but basically 
it is just:
java -jar start.jar

How can I increase the two values above?

Is there some config file that needs changing?

While I wait to see what recommendations the community has to offer I am 
experimenting with the following that I read on the SolrConfigXml wiki:

  <requestHandler name="standard" class="solr.SearchHandler" 
default="true">
    <lst name="defaults">
      <str name="echoParams">explicit</str>
      <str name="df">text</str>
    </lst>
    <!-- other params go here -->
     <shardHandlerFactory class="HttpShardHandlerFactory">
        <int name="socketTimeOut">1000</int>
        <int name="connTimeOut">5000</int>
        <int name="maxConnectionsPerHost">512</int>
      </shardHandlerFactory>
  </requestHandler>

I added the echo params and df as text because there was some error that 
faceting query threw.

Any help is appreciated.

I have been trying to apply load to our solr system and I can't get the 
CPU on the boxes to hardly budge. I noticed that during our tests when 
we reached 128 users the throughput flat lined at that point, and so I 
searched and sure enough I found the 128 connection limit mentioned.

Thank you.