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Two goroutines updating adjacent counters can saturate the memory bus on a c7g.4xlarge. This guide covers memory barriers, cache lines, and false sharing, and why placement groups do not fix application-level contention.
Palaniappan PWhole-item last-write-wins is how Global Tables lose cart merges. When to use counters, OR-Sets, and conflict-free merges vs when to keep a single Aurora writer.
Palaniappan PToo many "too many connections" pages are fixed by raising max_connections, which trades one outage for OOM on the writer. This guide traces deadlocks, pool sizing, RDS Proxy, and prepared statement caching on Aurora.
Palaniappan PCache-aside without an invalidation story ships stale pricing to 2% of users, and those are the hardest users to debug. This guide layers CloudFront, ElastiCache, and DAX with TTL, event-driven purge, and when write-through beats cache-aside.
Palaniappan PRedlock debates matter because ElastiCache is not a consensus system. Consistent hashing for sharding workers and ALB target stickiness, with DynamoDB conditional writes as the simpler alternative.
Palaniappan PExactly-once is a myth end to end, but idempotent consumers plus event stores get you close. CQRS read models on DynamoDB streams, Kinesis, and EventBridge replay semantics.
Palaniappan PProtobuf on the wire saves bytes, and GraphQL saves round trips until resolvers N+1 your Aurora cluster. ALB gRPC, AppSync, and consumer-driven contracts with Pact.
Palaniappan PC10k is solved until syscall overhead and context switches eat your Graviton cores. epoll, sendfile, and SO_REUSEPORT behaviors on EC2, and why Lambda caps concurrency differently.
Palaniappan PA heap that is too small triggers G1 humongous allocations, and one that is too large balloons pause times on Graviton. Corretto on ECS/EKS/Lambda Java, and when ZGC generational beats G1 for API heaps.
Palaniappan PConsumer group rebalance storms stall processing longer than broker outages. This guide covers cooperative rebalancing, idempotent producers, and transactional reads on Amazon MSK, and says when SQS FIFO is simpler.
Palaniappan PCluster upgrades and Karpenter consolidation look healthy in the console while PDB-blocked evictions freeze your node drain for 45 minutes. This guide covers minAvailable, maxUnavailable, and EKS managed node group semantics.
Manoj V.Ingesting every debug log to CloudWatch is how observability becomes a FinOps incident. Tail sampling with ADOT, Logs Insights, and Firehose to S3 for the long tail.
Manoj V.
