mysql_dump_slow

MysqlDumpSlow

A library to summarize MySQL slow_log records in Ruby.

Usage

Summarize and print result.

# Getting slow logs by using ActiveRecord for mysql.slow_log.
logs = SlowLog.all

# Summarize slow logs
summary = MysqlDumpSlow.summarize(logs)
summary.each do |conter|
  # counter provides printer that same as mysqldumpslow command.
  counter.to_mysqldumpslow
  # => Count: 2  Time=100s (200s)  Lock=200s (400s)  Rows=300 (600),  2hosts
  #      SELECT * FROM T
end

Use total/average getter

# counter provides every total/avg getter. See also test codes.
counter.total_query_time   # => 100000
counter.average_query_time # => 100000

• total_count
• [ total | average ]_query_time
• [ total | average ]_lock_time
• [ total | average ]_rows_set
• user_hosts

ActiveRecord

MysqlDumpSlow.summarize require ActiveRecord for mysql.slow_log table. An example is the following.

class SlowLog < ActiveRecord::Base
  self.table_name = 'slow_log'

  def self.new_connection_info
    connection_info = self.configrations[Rails.env]
    connection_info["database"] = "mysql"
    connection_info
  end

  establish_connection new_connection_info
end

Installation

Add this line to your application's Gemfile:

gem 'mysql_dump_slow'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mysql_dump_slow

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/monochromegane/mysql\_dump\_slow. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.