Ask for help: the website is blocked by traffic

question: after the recent transfer of the company"s website to a new server, Baidu statistics there, whether it is promotion or natural search, the users who visit are all retreated in a second. Consulted the personnel on the other side of Baidu, the preliminary judgment is suspected to be intercepted by traffic.
how should traffic blocking be detected?

Mar.12,2021

with https

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1be7867-31871.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be7867-31871.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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