Fixes geerlingguy#139: Add configuration for innodb_large_prefix.

Author: geerlingguy

README.md

@@ -84,7 +84,7 @@ Slow query log settings. Note that the log file will be created by this role, bu
     mysql_table_open_cache: "256"
     [...]
 
-The rest of the settings in `defaults/main.yml` control MySQL's memory usage. The default values are tuned for a server where MySQL can consume ~512 MB RAM, so you should consider adjusting them to suit your particular server better.
+The rest of the settings in `defaults/main.yml` control MySQL's memory usage and some other common settings. The default values are tuned for a server where MySQL can consume ~512 MB RAM, so you should consider adjusting them to suit your particular server better.
 
     mysql_server_id: "1"
     mysql_max_binlog_size: "100M"

defaults/main.yml

@@ -50,8 +50,10 @@ mysql_max_connections: 151
 mysql_wait_timeout: 28800
 
 # InnoDB settings.
-# Set .._buffer_pool_size up to 80% of RAM but beware of setting too high.
+mysql_innodb_large_prefix: "1"
+mysql_innodb_file_format: "barracuda"
 mysql_innodb_file_per_table: "1"
+# Set .._buffer_pool_size up to 80% of RAM but beware of setting too high.
 mysql_innodb_buffer_pool_size: "256M"
 # Set .._log_file_size to 25% of buffer pool size.
 mysql_innodb_log_file_size: "64M"

templates/my.cnf.j2

@@ -82,6 +82,8 @@ max_connections = {{ mysql_max_connections }}
 wait_timeout = {{ mysql_wait_timeout }}
 
 # InnoDB settings.
+innodb_large_prefix = {{ mysql_innodb_large_prefix }}
+innodb_file_format = {{ mysql_innodb_file_format }}
 innodb_file_per_table = {{ mysql_innodb_file_per_table }}
 innodb_buffer_pool_size = {{ mysql_innodb_buffer_pool_size }}
 innodb_log_file_size = {{ mysql_innodb_log_file_size }}