The uwsgi + djano head request causes the request not to respond.

the server is written by nginx + uwsgi + djano, the project is relatively old, and it has been found to be unresponsive recently. After investigation, it is found that the uwsgi queue is slow and full, eliminating the problem of excessive number of requests.
finally found that after each request is full, there will always be a large number of HEAD requests. Ask the boss for support and analysis, what causes this problem

Mar.04,2021
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-64f5-1bed9e1-31b84.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bed9e1-31b84.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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