Which SLIs/SLOs are relevant for Redis?

In the context of Redis, Service Level Indicators (SLIs) and Service Level Objectives (SLOs) are critical to ensure high availability and performance of the data store. Here are some relevant SLIs and SLOs for Redis:

  • Availability: Percentage of successful requests (e.g., 99.9% of requests should return a response).
  • Latency: Average response time (e.g., 95th percentile latency under 50 milliseconds).
  • Throughput: Number of operations per second (e.g., at least 100,000 commands processed per second).
  • Error Rate: Percentage of failed operations (e.g., less than 0.1% of requests should fail).
  • Memory Usage: Percentage of used memory compared to the max memory configured (e.g., not exceeding 85% of the allocated memory).

Establishing these SLIs and SLOs helps maintain the reliability and efficiency of Redis, ensuring that it meets the performance expectations of its users.

Here’s a sample implementation of a Redis connection check that could help monitor the availability:

<?php $redis = new Redis(); $redis->connect('127.0.0.1', 6379); if ($redis->ping() === '+PONG') { echo 'Redis is available.'; } else { echo 'Redis is not responding.'; } ?>

Redis SLIs SLOs Availability Latency Throughput Error Rate Monitoring Performance

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