如果业务处于低峰期，是否方便升级到 5.2.1 呢 ？ 5.2.0 版本是非稳定的版本，而且我从日志上看从 8 号开始，几乎每天都有重启的情况。
[2021/09/08 13:24:16.810 +08:00] [INFO] [printer.go:33] ["Welcome to TiDB."]
[2021/09/10 07:29:21.768 +08:00] [INFO] [printer.go:33] ["Welcome to TiDB."]
[2021/09/11 01:25:34.216 +08:00] [INFO] [printer.go:33] ["Welcome to TiDB."]
[2021/09/12 09:55:36.070 +08:00] [INFO] [printer.go:33] ["Welcome to TiDB."]
[2021/09/13 16:10:15.860 +08:00] [INFO] [printer.go:33] ["Welcome to TiDB."]
[2021/09/14 08:38:43.625 +08:00] [INFO] [printer.go:33] ["Welcome to TiDB."]