Prerequisite
- Enable mysql slow log – https://rtcamp.com/tutorials/mysql/slow-query-log/
- Peronca Toolkit – https://rtcamp.com/tutorials/mysql/percona-toolkit/
Installation
Download Anemometer & Extract it
cd /var/www/example.com/htdocs
git clone https://github.com/box/Anemometer.git anemometer
cd anemometer
Run mysql setup script and create a separate mysql user
mysql < install.sql
mysql -e "grant ALL ON slow_query_log.* to 'anemometer'@'localhost' IDENTIFIED BY 'superSecurePass';"
mysql -e "grant SELECT ON *.* to 'anemometer'@'localhost' IDENTIFIED BY 'superSecurePass';"
process mysql slow log to populate anemometer database
Run following command. Make sure you update superSecurePass with your password.
pt-query-digest --user=anemometer --password=superSecurePass \
--review D=slow_query_log,t=global_query_review \
--review-history D=slow_query_log,t=global_query_review_history \
--no-report --limit=0% --filter=" \$event->{Bytes} = length(\$event->{arg}) and \$event->{hostname}=\"$HOSTNAME\"" /var/log/mysql/slow.log
If above command is successful, you will see data getting populated in global_query_review and global_query_review_history tables in mysql’s database slow_query_log
anemometer php config file
Copy sample config file:
cp conf/sample.config.inc.php conf/config.inc.php
Open config file conf/config.inc.php and look for user and password option. Default user in sample config file is root. Change that to anemometer and password to your superSecurePass.
Config block will look like:
$conf['datasources']['localhost'] = array(
'host' => 'localhost',
'port' => 3306,
'db' => 'slow_query_log',
'user' => 'anemometer',
'password' => 'superSecurePass',
'tables' => array(
'global_query_review' => 'fact',
'global_query_review_history' => 'dimension'
),
'source_type' => 'slow_query_log'
);
You need to also update plugins section in same config file:
$conf['plugins'] = array(
'visual_explain' => '/usr/bin/pt-visual-explain',
'query_advisor' => '/usr/bin/pt-query-advisor',
#... other lines
$conn['user'] = 'anemometer';
$conn['password'] = 'superSecurePass';
return $conn;
},
Update PHP’s timezone
You may run into errors when using Anemometer. Just copy timezone from /etc/timezone and update date.timezone value in `/etc/php5/fpm/php.ini.
Restart FPM using service php5-fpm restart
Automate slow.log processing
Open /etc/logrotate.d/percona-server-server-5.6 (if using percona-mysql 5.6) or /etc/logrotate.d/mysql. If both doesn’t exist figure out mysql slow log rotation file.
Then add slow.log processing command after postrotate but before endscript:
postrotate
pt-query-digest --user=anemometer --password=superSecurePass \
--review D=slow_query_log,t=global_query_review \
--review-history D=slow_query_log,t=global_query_review_history \
--no-report --limit=0% --filter=" \$event->{Bytes} = length(\$event->{arg}) and \$event->{hostname}=\"$HOSTNAME\"" /var/log/mysql/slow.log.1
endscript
Usage
Just open example.com/anemometer in browser!