Ljubljana, Slovenia

Apm

Real world optimisation

Don’t optimize prematurely - but have a plan how you’re going to do it. With the services I write, a lot of the code may be clear, simple and readable over actually optimizing for speed. Sometimes, the difference between that code, and the optimized code, is a short refactor.

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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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