instance crashed during the perf test

[flaneur2020]

2022/07/07 00:54:54 the 1 time to run query Q9 : SELECT number FROM numbers_mt(10000000000) ORDER BY number DESC LIMIT 10;
2022/07/07 00:55:31 the 1 time result has error All attempts fail:
#1: query failed: request got bad status: 500 req={"sql":"SELECT number FROM numbers_mt(10000000000) ORDER BY number DESC LIMIT 10;"} resp={"error":{"kind":"HealthCheckFailed","message":"health check failed: backend instance maybe crashed: Get \"[http://10.1.103.65:9000/health\](http://10.1.103.65:9000/health/)": dial tcp 10.1.103.65:9000: connect: connection refused"}}