pg_ctl start -l logfile
pgbench -U postgres -i postgres
psql -U postgres -c "create extension vci"
psql -U postgres -c "create index accounts_vci on pgbench_accounts using vci(abalance, bid)"
pgbench --user postgres -c 1 -j 1 -T 3600 -M prepared postgres
killall -s 9 postgres