Changing default moxi configuration?

Is there away to change the default moxi configuration? The default couchbase and membase packages install moxi and run it when you start couchbase. I can see this configuration by running ps aux:

/opt/moxi/bin/moxi -Z port_listen=11211,default_bucket_name=default,downstream_max=1024,downstream_conn_max=4,connect_max_errors=5,connect_retry_interval=30000,connect_timeout=400,auth_timeout=100,cycle=200,downstream_conn_queue_timeout=200,downstream_timeout=5000,wait_queue_timeout=200 -z url=http://127.0.0.1:8091/pools/default/saslBucketsStreaming -p 0 -Y y -O stderr

I am worried that our downstream_conn_max might be too low, since we're sometimes unable to make a connection to the memcached vbucket. I would like to play around with these settings but it seems I can't find the correct configuration file. Can someone point me in the right direction?

Sorry if this question is simple, but I've read the FAQ and googled around and can't seem to come up with an answer.