tools: update mixed read/write perf testing script for a larger range of value size
#set -x
RATIO_LIST="1/128 1/8 1/4 1/2 2/1 4/1 8/1 128/1"
-VALUE_SIZE_POWER_RANGE="4 10"
-CONN_CLI_COUNT_POWER_RANGE="5 12"
+VALUE_SIZE_POWER_RANGE="8 14"
+CONN_CLI_COUNT_POWER_RANGE="5 11"
REPEAT_COUNT=5
RUN_COUNT=200000
