Devnet shall not store historical data as it will blow up memory (eth…

…ereum#239)

cicd/devnet/start.sh

@@ -52,7 +52,8 @@ netstats="${NODE_NAME}-${wallet}-${INSTANCE_IP}:xinfin_xdpos_hybrid_network_stat
 echo "Running a node with wallet: ${wallet} at IP: ${INSTANCE_IP}"
 echo "Starting nodes with $bootnodes ..."
 
-XDC --ethstats ${netstats} --gcmode=archive \
+# Note: --gcmode=archive means node will store all historical data. This will lead to high memory usage. Only needed if you need the node to perform historical operations
+XDC --ethstats ${netstats} --gcmode=full \
 --nat extip:${INSTANCE_IP} \
 --bootnodes ${bootnodes} --syncmode full \
 --datadir /work/xdcchain --networkid 551 \