configuration - How to increase the max_connections value for MySQL on Ubuntu Server? -


i use mysql 5.6 on ubuntu server 14.04 , want increase maximal allowed number of simultaneous connections (currently set default 151).

responsible setting max_connections in /etc/mysql/my.cnf. set 200 , restarted mysql server. now, has value 200:

$ cat /etc/mysql/my.cnf | grep "connections" max_connections        = 200 $ /etc/init.d/mysql restart  * stopping mysql database server mysqld                                                                                             [ ok ]   * starting mysql database server mysqld                                                                                             [ ok ]   * checking tables need upgrade, corrupt or  not closed cleanly.

but nothing has changed:

show variables "max_connections"; +-----------------+-------+ ¦ variable_name   ¦ value ¦ +-----------------+-------+ ¦ max_connections ¦ 151   ¦ +-----------------+-------+

how custom configuration of max_connections working?

$ ulimit -a | grep "open" open files                      (-n) 1024 $ ulimit -n 4096 $ ulimit -a | grep "open" open files                      (-n) 4096

added /etc/security/limits.conf:

* soft nofile 1024000 * hard nofile 1024000 * soft nproc 10240 * hard nproc 10240 root soft nproc unlimited

added /etc/mysql/my.cnf:

[mysqld_safe] open_files_limit = 1024000 [mysqld] open_files_limit = 1024000

but seems ignored:

show status 'open%'; +--------------------------+-------+ ¦ variable_name            ¦ value ¦ +--------------------------+-------+ ¦ open_files               ¦ 52    ¦ +--------------------------+-------+ ¦ open_streams             ¦ 0     ¦ +--------------------------+-------+ ¦ open_table_definitions   ¦ 434   ¦ +--------------------------+-------+ ¦ open_tables              ¦ 417   ¦ +--------------------------+-------+ ¦ opened_files             ¦ 847   ¦ +--------------------------+-------+ ¦ opened_table_definitions ¦ 0     ¦ +--------------------------+-------+ ¦ opened_tables            ¦ 0     ¦ +--------------------------+-------+

to avoid case of setting correct configs in wrong files set option in these files (some of them not there, created them):

$ mysqld --help --verbose | grep -b 1 cnf default options read following files in given order: /etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf

no effect.

you have increase open files limit on os, , afterwards, can put higher max_connections value.


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