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we have noticed that our database server is getting so high CPU (more than 90 % used by mysqld process), the output of mysqltunner is shown below, can you help me please,

i'm okay about the innodb_buffer_pool_instances(=7), but is there some other suggestions ?

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    High CPU utilisation is often an indicator of poorly tuned queries. "Joins performed without indexes" is a good place to start looking. You're also running short on memory, which I would consider to be a higher priority problem than 90% CPU utilisation.
    – mustaccio
    Jul 27 at 18:35
  • where can i find them ?
    – Hamza AZIZ
    Jul 27 at 18:37
  • cross posted...
    – Rick James
    Jul 27 at 23:01
  • From MySQL Command Prompt, SET GLOBAL log_queries_not_using_indexes=1 for 15 minutes for logging to your Slow Query Log. Turn back off in 15 minutes with SET GLOBAL log_queries_not_using_indexes=0;. Look at your Slow Query Log. Post on pastebin.com A) your complete MySQLTuner report, B) SHOW GLOBAL STATUS; and C) SHOW GLOBAL VARIABLES;, and D) from your OS report from ulimit -a for more helpful suggestions.
    – Wilson Hauck
    Aug 5 at 21:16