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mit

Member

Registered: 2013-11-04

Posts: 2

Problem to increaase max open files to more than 1024

Hello,
I tried to increase the max open files to more than 1024 in the following way

$ sudo nano /etc/security/limits.conf 
mysql           hard    nofile          8192
mysql           soft    nofile          1200

However, after reboot I am still not able to start MariaDB:

$ sudo systemctl start mysqld
Job for mysqld.service failed. See 'systemctl status mysqld.service' and 'journalctl -xn' for details.

$ sudo systemctl status mysqld
● mysqld.service - MariaDB database server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled)
   Active: activating (start-post) since Tue 2014-09-02 13:08:20 EST; 53s ago
 Main PID: 6504 (mysqld);         : 6505 (mysqld-post)
   CGroup: /system.slice/mysqld.service
           ├─6504 /usr/bin/mysqld --pid-file=/run/mysqld/mysqld.pid
           └─control
             ├─6505 /bin/sh /usr/bin/mysqld-post
             └─6953 sleep 1

Sep 02 13:08:20 acpfg mysqld[6504]: 140902 13:08:20 [Warning] Could not increase number of max_open_files to more than 1024 (request: 4607)

I am using the following /etc/mysql/my.cnf

[mysql]

# CLIENT #
port                           = 3306
socket                         = /home/u/tmp/mysql/mysql.sock

[mysqld]

# GENERAL #
user                           = mysql
default-storage-engine         = InnoDB
socket                         = /home/u/tmp/mysql/mysql.sock
pid-file                       = /home/u/tmp/mysql/mysql.pid

# MyISAM #
key-buffer-size                = 32M
myisam-recover                 = FORCE,BACKUP

# SAFETY #
max-allowed-packet             = 16M
max-connect-errors             = 1000000
skip-name-resolve
sql-mode                       = STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_AUTO_VALUE_ON_ZERO,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,ONLY_FULL_GROUP_BY
sysdate-is-now                 = 1
innodb                         = FORCE
innodb-strict-mode             = 1

# DATA STORAGE #
datadir                        = /home/u/tmp/mysql/

# BINARY LOGGING #
log-bin                        = /home/u/tmp/mysql/mysql-bin
expire-logs-days               = 14
sync-binlog                    = 1

# CACHES AND LIMITS #
tmp-table-size                 = 32M
max-heap-table-size            = 32M
query-cache-type               = 0
query-cache-size               = 0
max-connections                = 500
thread-cache-size              = 50
open-files-limit               = 65535
table-definition-cache         = 1024
table-open-cache               = 2048

# INNODB #
innodb-flush-method            = O_DIRECT
innodb-log-files-in-group      = 2
innodb-log-file-size           = 128M
innodb-flush-log-at-trx-commit = 1
innodb-file-per-table          = 1
innodb-buffer-pool-size        = 2G

# LOGGING #
log-error                      = /home/u/tmp/mysql/mysql-error.log
log-queries-not-using-indexes  = 1
slow-query-log                 = 1
slow-query-log-file            = /home/u/tmp/mysql/mysql-slow.log

How is it possible to increase the number?

Thank you in advance.

danfossi

Member

Registered: 2013-06-05

Posts: 21

Re: Problem to increaase max open files to more than 1024

Change/add in the my.ini file, under [mysqld]:

max_allowed_packet=2048M

Reference:
* http://dev.mysql.com/doc/refman/5.5/en/ … wed_packet