openstack
/
fuel-library
Code Issues Proposed changes

Modify memory calculation formula for MySQL 

- Optimize memory calculation formula. From one hand we want to limit
  MySQL to allocate not more than 50% of RAM. From other hand we want to
  have 1024 or greater connections. So, if environment has 2GB MySQL
  will allocate 1720Mb, if environment has 3 GB it will allocate 1984Mb
  of RAM. It will allocate 50% of RAM if server has 4.5+ GB. The higher
  limit will have action if server has 37+GB. In that case MySQL will
  allocate less than 50% of RAM.
- Pass key_buffer_size in megabytes rather than bytes.
- Remove query_cache_type, query_cache_type from fuel_override_options
  hash, as these settings are galera specific, so they should be
  explicitly in wsrep_options hash
- Remove myisam_sort_buffer_size. OpenStack services use InnoDB engine,
  so MyISAM optimazation should be disabled. The only DB which uses
  MyISAM is 'mysql'. The default value 8M is enough

DocImpact
Closes-Bug: #1648766

Change-Id: Ia48f94936fcd3090208e4e485d7c9cbfea3c0ed4
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>
This commit is contained in:
Sergii Golovatiuk 2016-12-19 12:15:47 +01:00
parent 7212b04784
commit 09ea28e73d
1 changed files with 26 additions and 12 deletions
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38
deployment/puppet/osnailyfacter/manifests/database/database.pp
View File

@ -136,14 +136,31 @@ class osnailyfacter::database::database {
} else {
$mysql_performance_schema = 'on'
}
$innodb_buffer_pool_size = inline_template("<%= [(${::memorysize_mb} * 0.2 + 0).floor, 10000].min %>")
$innodb_log_file_size = inline_template("<%= [(${innodb_buffer_pool_size} * 0.2 + 0).floor, 2047].min %>")
$key_buffer_size = 64
$sort_buffer_size_mb = '0.25'
$read_buffer_size_mb = '0.125'
$max_connections = inline_template(
"<%= [[((${::memorysize_mb} * 0.3 - ${key_buffer_size}) /
(${sort_buffer_size_mb} + ${read_buffer_size_mb})).floor, 8192].min, 2048].max %>")
$innodb_buffer_pool_size = inline_template("<%= [(${::memorysize_mb} * 0.25).floor, 8192].min %>")
$innodb_log_file_size = inline_template("<%= [(${innodb_buffer_pool_size} * 0.2).floor, 2047].min %>")
#http://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html#sysvar_innodb_log_buffer_size
$innodb_log_buffer_size = '8'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_key_buffer_size
$key_buffer_size = '8'
#Disabled for galera
$query_cache_size = '0'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_tmp_table_size
$tmp_table_size = '16'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_read_buffer_size
$read_buffer_size = '0.125'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_read_rnd_buffer_size
$read_rnd_buffer_size = '0.25'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_sort_buffer_size
$sort_buffer_size = '0.25'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_join_buffer_size
$join_buffer_size = '0.25'
#http://dev.mysql.com/doc/refman/5.6/en/replication-options-binary-log.html#sysvar_binlog_cache_size
$binlog_cache_size = '0.03125'
#http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_thread_stack
$thread_stack = '0.25'
$max_connections = inline_template("<%= [[((${::memorysize_mb} * 0.25 - ${key_buffer_size} - ${query_cache_size} - ${tmp_table_size} - ${innodb_log_buffer_size} ) /
(${read_buffer_size} + ${read_rnd_buffer_size} + ${sort_buffer_size} + ${join_buffer_size} + ${binlog_cache_size} + ${thread_stack})).floor, 8192].min, 1024].max %>")
$wsrep_provider_options = "\"gcache.size=${galera_gcache_size}; gmcast.listen_addr=tcp://${galera_node_address}:${wsrep_group_comm_port}\""
$wsrep_slave_threads = inline_template("<%= [[${::processorcount}*2, 4].max, 12].min %>")
@ -184,14 +201,11 @@ class osnailyfacter::database::database {
'character-set-server' => 'utf8',
'skip-name-resolve' => $mysql_skip_name_resolve,
'performance_schema' => $mysql_performance_schema,
'myisam_sort_buffer_size' => '64M',
'wait_timeout' => '1800',
'open_files_limit' => '102400',
'table_open_cache' => '10000',
'key_buffer_size' => $key_buffer_size,
'key_buffer_size' => "${key_buffer_size}M",
'max_allowed_packet' => '256M',
'query_cache_size' => '0',
'query_cache_type' => '0',
'innodb-data-home-dir' => '/var/lib/mysql',
'innodb_file_format' => 'Barracuda',
'innodb_file_per_table' => '1',