Out of memory: Kill process 4924 (mysqld) 錯誤訊息

記憶體超過溢出導致系統崩潰，需要強制重啟系統，重啟後要暸解是什麼導致記憶體超過，可以先關掉服務避免再次當機，例如:將Nginx網頁服務關閉，不繼續使用佔用記憶體。

錯誤訊息：

GeEXT&CRk login: [ 1160.2687181 Out of memory: Kill process 4924 (mysqld) score 19 or sacrifice child

[ 1160.268826] Killed process 4924 (mysqld) total-um:2169788kB, anon-rss:157408kB, file-rss:0kB, shmem-rss:0kB

[ 1160.3498651 Out of memory: Kill process 9437 (httpd) score 14 or sacrifice child

[ 1160.349944] Killed process 9437 (httpd) total-um:2776664kB, anon-rss:113408kB, file-rss:0kB, shmem-rss:16kB

[ 1167.8118311 Out of memory: Kill process 9936 (httpd) score 13 or sacrifice child

[ 1167.8118911 Killed process 9936 (httpd) total-um:2776268kB, anon-rss:106688kB, file-rss:8kB, shmem-rss:16kB

[ 1167.8239501 Out of memory: Kill process 10358 (httpd) score 13 or sacrifice child

[ 1167.826104] Killed process 10358 (httpd) total-um:2776268kB, anon-rss:109272kB, file-rss:972kB, shmem-rss:16kB