May 24, 2026
Understand why users get logged out unexpectedly when Redis evicts session keys and how to configure maxmemory-policy, TTL, and idle timeouts to keep sessions alive as intended.
Find out what causes replication lag in Redis primary-replica setups, how to measure it with INFO and latency metrics, and tuning steps to keep replicas nearly real-time.
Learn how a sudden surge of requests for an expired cache key can overload your database and how to stop it using mutex locks, probabilistic early recomputation, and TTL jitter in Redis.
Stop unexpected CPU and I/O spikes caused by AOF rewrites by adjusting the rewrite trigger thresholds and scheduling rewrites during low-traffic windows.
Discover why Redis Pub/Sub drops messages during network disconnects or slow consumers and explore patterns like Redis Streams and list-based queues for guaranteed delivery.
Choose PostgreSQL JSONB indexes for containment, key lookup, range filters, and hybrid relational designs.
Use PostgreSQL FDWs to query remote databases safely, tune pushdown, and avoid common federation performance traps.
Use PostgreSQL Row-Level Security with RBAC policies for tenant isolation, ownership checks, and safer application access.
Set up PostgreSQL logical replication for selective sync, upgrades, reporting copies, and carefully scoped bidirectional designs.
Learn how to configure PgBouncer connection pooling for PostgreSQL to handle thousands of concurrent connections, reduce resource overhead, and dramatically improve application performance.
Generate SSH keys, copy public keys to servers, use ssh-agent, and manage host-specific SSH config safely.
Learn local, remote, and dynamic SSH port forwarding with practical commands for databases, web apps, and SOCKS proxies.