Load balancing — scaling WordPress beyond single server

Single server obsługuje ~1000 concurrent users. Powyżej tego — upgrade CPU/RAM i hit ceiling. Solution: multiple servers + load balancer. Load balancer basics Load balancer sits in front. User connects do load balancera. Load balancer routes request do jednego z 10...

Database optimization — indexes, queries, replication

Database to bottleneck dla większości WordPress sites. Wszystkie operacje idą przez database. Jeśli database slow — everything slow. Indexes — baza danych highway Without indexes: full table scan (check every row). With indexes: direct lookup. Difference między 500ms...

Monitorowanie i alerting — catch issues przed users notice

Downtime discovered by users = worst-case. Customer emails „site down” before ty wiesz. Monitoring prevents to. Uptime monitoring Services like Uptimerobot ping site every 60 seconds. If response code nie 200 — alert. Email/SMS/Slack. Ty wiesz INSTANTLY....

Performance profiling — discover actual bottlenecks

Client: „site is slow”. Ty: „to pewnie database”. Fact: to external API call zajmuje 5 sekund. Assumptions błędne. Profiling reveals truth. Server-side profiling Xdebug profiler generates callgrind file. Tools jak KCachegrind show które...