問題

201026 12:59:09 mysqld_safe mysqld from pid file /var/run/mariadb/mariadb.pid ended
201026 13:01:37 mysqld_safe Starting mysqld daemon with databases from /data/mysql
201026 13:01:37 [Note] /usr/libexec/mysqld (mysqld 5.5.65-MariaDB) starting as process 32382 ...
201026 13:01:37 [Warning] Could not increase number of max_open_files to more than 1024 (request: 4907)
 
201026 13:01:37 InnoDB: The InnoDB memory heap is disabled
201026 13:01:37 InnoDB: Mutexes and rw_locks use GCC atomic builtins
201026 13:01:37 InnoDB: Compressed tables use zlib 1.2.7
201026 13:01:37 InnoDB: Using Linux native AIO
201026 13:01:37 InnoDB: Initializing buffer pool, size = 4.0G
201026 13:01:37 InnoDB: Completed initialization of buffer pool
 
201026 13:01:37  InnoDB: Log file ./ib_logfile0 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile0 size to 768 MB
InnoDB: Database physically writes the file full: wait...
201026 13:01:42  InnoDB: Log file ./ib_logfile1 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile1 size to 768
 
 MB

解決方法：

修改服務

vim /usr/lib/systemd/system/mariadb.service
#在[service]下面加

[Service]
LimitNOFILE=infinity

參考：

https://mariadb.com/kb/en/could-not-increase-number-of-max_open_files-to-more-than-1024-request-1835/