Data is smaller and disks are bigger than you'd think.
Reliable Insights
A blog on monitoring, scale and operational Sanity
Users are sometimes surprised that Prometheus uses RAM, let's look at that.
Your service's traffic is steadily growing, latency has increased a bit but it's within reason. One day you launch a new customer and the latency jumps through the roof causing an outage. What happened? You hit the knee.
Traffic from users to your servers isn't a steady stream, it waxes and wanes over the day and week. The peak-to-mean ratio is your primary tool to avoid outages or unnecessary costs due to this.
Caches are a common feature of distributed systems, often added to improve performance. There are three main types of cache, and knowing about them will help you design robust systems.
