Increasing File Descriptors and Open Files Limit CentOS 7Some programs like Apache and MySQL require a higher number of file descriptors. # Find the default limit – check the open files line – it will be 1024 sudo ulimit -a To increase edit nano /etc/sysctl.conf add the below line, save and exit fs.file-max = 100000 We also need to increase hard and soft limits * soft nproc 65535 * hard nproc 65535 * soft nofile 65535 * hard nofile 65535 Next run the command sudo sysctl -p for MySQL, edit /usr/lib/systemd/system/mysqld.service and add the below 2 lines at the end, save and exit LimitNOFILE=65535 LimitNPROC=65535 then increase the table_open_cache and open_files_limit in my.cnf # reload systemctl sudo systemctl daemon-reload # if you modified mysql config, restart mysql and check values for table_open_cache and open_files_limit systemctl restart mysqld.service run the below command to check the open files limit – change user based on requirement # for mysql su - mysql -c 'ulimit -aHS' -s '/bin/bash' # for apache su - apache -c 'ulimit -aHS' -s '/bin/bash' |
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