What should I do if the average usage of php linux memory exceeds 90%?

the average utilization rate of the content of the security software installed on the linux system is more than 90%. How to do this

Php
Jun.18,2022
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linux, if the memory calculation includes buff/cache , 90% of the memory is normal. There is no need to ignore it. You can set the relevant parameters min_free_kbytes if you have to adjust it. Of course, you can also use top and so on to see if a single process takes up a lot of memory.

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-64f5-1b313f8-2bd86.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b313f8-2bd86.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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