Ruby gem 2.8:
Container memory &
JRuby on Alpine Linux support

Tom Tom de Bruijn on

We just released AppSignal for Ruby gem version 2.8.0 which improves memory host metrics reporting on containers, supports JRuby on Alpine Linux and improves the diagnostics reports we use to debug any issue you may be having.

Container memory metrics

On most container systems our current method of reporting host metrics is inaccurate. Read the issue report for more details.

In order to report accurate metrics we’ve been working to improve our reporting for container host metrics. First to be fixed are memory metrics, so you can track if your 512MB container is running out of memory or not.

Support for other metrics such as CPU and disk IO will follow in future releases.

JRuby support for Alpine Linux

JRuby is now supported on Alpine Linux. Due to an improvement to our build process we can now support this combination, building dynamic libraries for our extension to be used on Alpine Linux.

Diagnostic improvements

Support is done by all of AppSignal’s developers do support on a weekly basis. To optimize every support request we’ve been working to improve our diagnostics report by adding more relevant data to the report based on previously encountered issues.

We’ve also been working on adding a validator to the diagnostic report. This is still a work in progress at time of writing, but the Ruby gem will already print a link to the validator on We hope that in time everyone can use this validator as well to debug most common issues.

Send a report by using the diagnose command line tool:

appsignal diagnose --send-report

Please see the changelog for more details about these improvements, deprecations and other changes. And as always: get in touch if you encounter problems after upgrading. We’re happy to help!

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