Awesome

Yabeda plugin to collect essential metrics for database query performance and connection pool stats.

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add yabeda-activerecord

Launch/restart your application and that's it: metrics are being collected.

To expose metrics Don't forget to also add one of Yabeda adapters to your Gemfile.

Metrics

Query performance

Metric	Type	Tags	Description
`queries_total`	counter	config, kind, cached, async	Total number of SQL queries issued by application via ActiveRecord
`query_duration`	histogram	config, kind, cached, async	Duration for SQL queries generated by ActiveRecord

Connection pool stats

Metric	Type	Tags	Description
`connection_pool_size`	gauge	config	Connection pool size
`connection_pool_connections`	gauge	config	Total number of connections currently created in the pool (sum of busy, dead, and idle).
`connection_pool_busy`	gauge	config	Number of connections that has been checked out by some thread and are in use now.
`connection_pool_dead`	gauge	config	Number of lost connections for the pool. A lost connection can occur if a programmer forgets to checkin a connection at the end of a thread or a thread dies unexpectedly.
`connection_pool_idle`	gauge	config	Number of free connections, that are available for checkout.
`connection_pool_waiting`	gauge	config	Number of threads waiting for a connection to become available for checkout.
`connection_pool_checkout_timeout`	gauge	config	Checkout waiting timeout in seconds

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec 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.

Bug reports and pull requests are welcome on GitHub at https://github.com/yabeda-rb/yabeda-activerecord.

Releasing

Bump version number in lib/yabeda/activerecord/version.rb

In case of pre-releases keep in mind rubygems/rubygems#3086 and check version with command like Gem::Version.new(Yabeda::ActiveRecord::VERSION).to_s
Fill CHANGELOG.md with missing changes, add header with version and date.

Make a commit:

git add lib/yabeda/active_record/version.rb CHANGELOG.md
version=$(ruby -r ./lib/yabeda/active_record/version.rb -e "puts Gem::Version.new(Yabeda::ActiveRecord::VERSION)")
git commit --message="${version}: " --edit

Create annotated tag:

git tag v${version} --annotate --message="${version}: " --edit --sign

Fill version name into subject line and (optionally) some description (list of changes will be taken from changelog and appended automatically)
Push it:
```
git push --follow-tags
```
GitHub Actions will create a new release, build and push gem into RubyGems! You're done!

Contributing