Linux memory usage problem

 du -sh /* | sort -nrfree -m
du4Gfree8G

du-sh / * | sort-nr is shown as follows

clipboard.png

free -m

clipboard.png

May.06,2021
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-64f5-1e537b5-45223.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e537b5-45223.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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