The Webalert Blog
Expert insights on website monitoring, uptime optimization, SSL management, and building trust with status pages.
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Memory Leaks in Production: Causes, Detection, and Fixes
What a memory leak is, why processes slowly bloat until they crash, how to detect leaks with heap and RSS monitoring, and how to fix them before an OOM restart.
June 29, 2026
8 min read
Database Schema Migrations: Safe DDL Without Downtime
Why schema migrations cause outages, what makes a DDL change safe or unsafe, how to run zero-downtime migrations with expand-and-contract, and monitor them.
June 29, 2026
8 min read
Backpressure Explained: Flow Control for Distributed Systems
What backpressure is, why a slow downstream takes down a whole system without it, and how to apply it with bounded queues, rate limiting, and load shedding.
June 25, 2026
7 min read
Consuming Rate-Limited APIs: Handling 429s in Production
How to consume rate-limited APIs safely: read RateLimit headers, handle 429s with backoff, and monitor throttled dependencies before they break your app.
June 25, 2026
6 min read
Queue Depth Monitoring: Catch Backlog and Latency Before Users Do
What queue depth is, why a growing backlog silently degrades latency, and how to monitor depth, age, and drain rate so throttling never reaches users.
June 25, 2026
7 min read
Better Uptime vs Webalert: Uptime Monitoring Comparison 2026
Comparing Better Uptime vs Webalert for website uptime monitoring. See features, pricing, check intervals, and alert integrations to choose the best tool.
June 23, 2026
3 min read
Cache Stampede and Thundering Herd: Prevention Guide
What cache stampede and thundering herd are, why one expiring hot key can topple a healthy backend, and how to prevent it with locking and jitter.
June 23, 2026
6 min read
Cloudflare 520–526 Errors Explained: Causes and Fixes
What Cloudflare's 520, 521, 522, 523, 524, 525, and 526 errors mean, why they happen between Cloudflare and origin, and how to diagnose and fix each one.
June 23, 2026
6 min read
Database Failover and High Availability Explained
How database failover and high availability work — standby promotion, split-brain, quorum, automatic failover — and how to verify your HA actually recovers.
June 23, 2026
6 min read
Datadog vs Webalert: Uptime Monitoring Comparison 2026
Comparing Datadog vs Webalert for website uptime monitoring. See features, pricing, check intervals, and alert integrations to choose the best tool.
June 23, 2026
3 min read
Freshping vs Webalert: Uptime Monitoring Comparison 2026
Comparing Freshping vs Webalert for website uptime monitoring. See features, pricing, check intervals, and alert integrations to choose the best tool.
June 23, 2026
3 min read
mTLS Explained: How Mutual TLS Works and What to Monitor
What mutual TLS (mTLS) is, how two-way certificate authentication differs from regular TLS, and how to monitor client certs so they don't cause outages.
June 23, 2026
6 min read