ensure swap disabled, closes h2oai#80

run.sh

@@ -14,6 +14,9 @@ if [[ -f ./stop ]]; then echo "# Benchmark run $BATCH aborted. 'stop' file exist
 source ./ch.sh
 ch_active && echo "# Benchmark run $BATCH aborted. clickhouse-server is running, shut it down before calling 'run.sh'" && exit;
 
+# confirm swap disabled
+Rscript -e 'swap_all<-data.table::fread("free -h | grep Swap", header=FALSE)[, -1L][, as.numeric(gsub("[^0-9\\.]", "", unlist(.SD)))]; swap_off<-!is.na(s<-sum(swap_all)) && s==0; q("no", status=as.numeric(swap_off))' && echo "# Benchmark run $BATCH aborted. swap is enabled, 'free -h' has to report only 0s for Swap, run 'swapoff -a' before calling 'run.sh'" && exit;
+
 # set lock
 if [[ -f ./run.lock ]]; then echo "# Benchmark run $BATCH aborted. 'run.lock' file exists, this should be checked before calling 'run.sh'. Ouput redirection mismatch might have happened if writing output to same file as currently running $(cat ./run.lock) benchmark run" && exit; else echo $BATCH > run.lock; fi;