Adjusted racy test [#CLICKHOUSE-2]

dbms/tests/queries/0_stateless/00601_kill_running_query.sh

@@ -5,7 +5,7 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 
 set -e -o pipefail
 
-$CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL?query_id=hello" -d 'SELECT sum(ignore(*)) FROM (SELECT number % 1000 AS k, groupArray(number) FROM numbers(100000000) GROUP BY k)' | wc -l &
+$CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL?query_id=hello" -d 'SELECT sum(ignore(*)) FROM (SELECT number % 1000 AS k, groupArray(number) FROM numbers(20000000) GROUP BY k)' | wc -l &
 sleep 0.1 # First query (usually) should be received by the server after this sleep.
 $CLICKHOUSE_CURL -sS "$CLICKHOUSE_URL" -d "KILL QUERY WHERE query_id = 'hello' FORMAT Null"
 wait