Ljubljana, Slovenia

Advent2019

Go: Stress testing our service

As we implemented our service that adds pageviews to the database, we realize an unfortunate circumstance. Each insert query takes about 12ms, which means our request rate, at least per single CPU core, is poor. We’re talking about 83 req/s poor.

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Instrumenting the Database client with Elastic APM

After we set up Elastic APM to log our request transaction, the following thing we wish to instrument are the SQL queries going to our database endpoint. Elastic APM provides instrumentation that wraps the database/sql driver, which produces an *sql.DB.

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Go: Instrumenting the HTTP service with Elastic APM

Elastic APM is an application performance monitoring product Elastic, the makers of Elasticsearch, and most notably the ELK stack (Elasticsearch, Logstash, Kibana). APM is another plug and play product of theirs, that hooks up to your existing ELK installation and provides endpoints for application agents to receive performance metrics data.

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Improving our database handling

As we start to develop real services, we found out that our database handling needs some improvements. We are going to do a series of improvements of the current state by adding some new features, and restructuring some existing ones.

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Issuing requests against our microservice

In order to test our microservice, we require a database, running migrations, and our service itself. We’re going to build a docker-compose.yml file which takes care of all of this.

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