Too many changes

Disk space ran out 18 hours into the test.  Should be enough to reduce proportion of updates, and reduce key space by 20% (not 40%)

Author: martinsumner

examples/riakc_nhs.config

@@ -15,7 +15,7 @@
 %% For alwaysget operations what is:
 %% - the maximum number of keys per worker (max number of keys = this * concurrent)
 %% - whether the inserts should be in key_order, or whether the order should be skewed by a 1 byte hash at the head of the key
-{alwaysget, {600000, skew_order}}.
+{alwaysget, {800000, skew_order}}.
 
 {pb_ips, [{127,0,0,1}]}.
 {http_ips, [{127,0,0,1}]}.