Page 164 - Maxim Mironjuk

Redis runs as a single-threaded event loop, where every slow command blocks all other clients at once. The slowlog logs exactly these commands with timestamp, duration, and arguments, making it the most direct tool for tracing a latency problem back to a specific command instead of a vague guess.

Running unserialize on untrusted input such as cookies, session data, or API payloads opens the door to PHP Object Injection and dangerous gadget chains that abuse magic methods like wakeup and destruct to execute arbitrary code. This article explains the mechanics, shows safer alternatives like json_decode, and covers proven deserialization patterns for production PHP and Magento applications.

InnoDB replaced MyISAM as the default storage engine back in MySQL 5.5, yet MyISAM still turns up in grown systems, often unnoticed. Anyone who doesn't understand the transaction behavior, locking granularity and crash safety of the two engines risks data loss during migrations and legacy maintenance. This article explains the differences in detail and shows what a clean migration to InnoDB looks like.

Cron jobs and queue consumers still running during a deployment are an underestimated source of errors. A consumer that runs against the old release code while the symlink switches to the new release can cause data consistency problems. This article explains how to reliably control cron and consumers in the GitLab deployment process.

Too little swap leads to crashes from the out-of-memory killer during load spikes, too much swap hides a real memory shortage behind agonizing slowness. This article shows how much swap actually makes sense on a modern server, how the vm.swappiness kernel parameter controls swapping behavior, how to safely create a swapfile, and how to tell real memory pressure apart from normal caching.

An unregistered custom property always inherits in CSS, regardless of whether its name suggests a local, component-scoped value. Only @property gives a custom property a fixed type, a guaranteed initial value, and explicit inheritance behavior, closing an entire class of bugs that are otherwise hard to track down in large design systems.

Everyone knows TODO and FIXME, but few teams use the full potential of PhpStorm's TODO system. With custom patterns like MAGENTO-UPGRADE or SECURITY, tasks become visible project-wide and can be worked through by pattern rather than file in the TODO tool window.

No single tool masters every aspect of a modern deployment stack. Bash as glue code connects PHP scripts, SQL dump workflows, Docker build chains and Git hooks into one coherent automation system, with robust exit code handling, targeted data forwarding and clear error escalation that surfaces problems early.

A snapshot only becomes a real backup strategy once the repository is set up correctly, the snapshot frequency is automated through an SLM policy, and the restore path is tested regularly. This article shows how snapshot repositories on S3 and filesystem work, how incremental snapshots save storage, and how a restore actually plays out in practice without endangering the production cluster.

ARIA never overrides appearance or behavior, it only overlays the accessibility tree with roles, states, and properties that screen readers and other assistive technologies read out. Developers who use ARIA without knowing the five ground rules often build interfaces that are less accessible, not more. This article uses a real tab component to show when ARIA is actually necessary and when a native HTML element remains the better choice.