mysql_configuration - nx.beandog.org

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====== MySQL Configuration ======

  * [[MySQL]]
  * [[MySQL Character Sets]]
  * [[MySQL Logs]]
  * [[MySQL Optimization]]

==== Update Runtime Configuration ====

For MB sizes, use ''bc 1024^2 * <num MB>''

**Set key_buffer_size to 16MB**

<code>
SET GLOBAL key_buffer_size = 16777216;
</code>

**Set max_allowed_packet to 1MB**

<code>
SET GLOBAL max_allowed_packet = 1048576;
</code>

**Set myisam_sort_buffer_size to 64MB**
<code>
SET @@myisam_sort_buffer_size = 67108864;
</code>


==== Default Configuration Files ====

== Small ==

<code>
# This is for a system with little memory (<= 64M) where MySQL is only used
# from time to time and it's important that the mysqld daemon
# doesn't use much resources.

[mysqld]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock
skip-locking
key_buffer_size = 16K
max_allowed_packet = 1M
table_open_cache = 4
sort_buffer_size = 64K
read_buffer_size = 256K
read_rnd_buffer_size = 256K
net_buffer_length = 2K
thread_stack = 128K
server-id       = 1
</code>

== Medium ==

<code>
# This is for a system with little memory (32M - 64M) where MySQL plays
# an important part, or systems up to 128M where MySQL is used together with
# other programs (such as a web server)

[mysqld]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock
skip-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
log-bin=mysql-bin
binlog_format=mixed
server-id       = 1
</code>

== Large ==

<code>
# This is for a large system with memory = 512M where the system runs mainly
# MySQL.

[mysqld]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock
skip-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
thread_concurrency = 8
log-bin=mysql-bin
binlog_format=mixed
server-id       = 1
</code>

== Default ==

<code>
key_buffer_size = 8M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 2M
read_buffer_size = 128K
read_rnd_buffer_size = 256K
myisam_sort_buffer_size = 8M
thread_cache_size = 0
query_cache_size= 0
thread_concurrency = 10
</code>
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