Emphasize that statement summary history tables may lose after TiDB r… (#3781)
Emphasize that statement summary history tables may lose after TiDB r… (#3781)

* Emphasize that statement summary history tables may lose after TiDB rebooting

* Update statement-summary-tables.md

Co-authored-by: Keke Yi <4b13e11d5beb5669a80650bc9e0535372af5b679@users.noreply.github.com>

Co-authored-by: Keke Yi <4b13e11d5beb5669a80650bc9e0535372af5b679@users.noreply.github.com>
pingcap/docs,pingcap/docs,pingcap/docs