High Performance MySQL Guide

Install, connect, CRUD, create tables — fully beginner-friendly

SELECT / JOIN / subqueries / CTE — runnable examples cheatsheet

mysql CLI / DBeaver / Navicat / DataGrip — features, pricing & use cases

INT / VARCHAR / DATETIME / JSON / BLOB — storage, range & gotchas

Connector → Parser → Optimizer → Executor → Storage engine full pipeline

Buffer Pool / Redo Log / Undo Log / MVCC / Doublewrite — layer by layer

Directory layout, build & debug, key call chains — understand MySQL at source level

RU / RC / RR / Serializable — interactive lab + phantom/dirty read visualization

Cost model, index selection, JOIN reorder, subquery transforms — understand decisions

Paste EXPLAIN output, auto-highlight bottlenecks & get optimization tips

Input RAM/CPU/workload type, generate optimized my.cnf configuration

Upload slow query log, auto-aggregate & rank with Top-N optimization tips

Input DDL + queries, get smart index recommendations with performance estimates

B+Tree / covering index / prefix index / index failure scenarios

Slow query rewrite, JOIN tuning, pagination, batch insert — real cases

Normal forms, PK strategy, column selection, large-table design patterns

Row lock / gap lock / Next-Key Lock / deadlock detection & troubleshooting

N+1 / lazy loading / batch ops — Hibernate / MyBatis / GORM / Prisma compared

RANGE / LIST / HASH / KEY — when to use, when not, maintenance tips

Internal temp tables, MEMORY engine, TempTable engine — optimize filesort & GROUP BY

Async / semi-sync / group replication / GTID — setup, monitoring & recovery

MHA / Orchestrator / InnoDB Cluster / ProxySQL / Vitess — solution selection

mysqldump / xtrabackup / mysqlpump / Clone Plugin — strategy & recovery drills

Performance Schema / sys / PMM / Grafana — key metrics & alert rules

Least privilege / TLS / audit log / SQL injection prevention / data masking

CPU spike / OOM / replication lag / connection exhaustion — 12 runbooks

Instant DDL / pt-osc / gh-ost — zero-downtime schema changes for large tables

HikariCP / Druid / ProxySQL — parameter formulas, monitoring & pitfalls

ShardingSphere / Vitess / custom — shard key selection & data migration

Debezium / Canal / Maxwell — Binlog parsing to Kafka/ES/data lake

Cache-Aside / Write-Through / cache stampede/avalanche/penetration solutions

RDS / Aurora / PlanetScale / TiDB Cloud — performance, pricing & migration

Operator / StatefulSet / PV strategy / backup — containerized MySQL in practice

Orders / inventory / flash sales / cart — high-concurrency e-commerce patterns

Reconciliation / ledger / balance consistency / DECIMAL precision

Shared table / per-schema / per-database — isolation level selection & migration

Characters / inventory / leaderboard / combat log — high-write low-latency gaming DB

MySQL 9.x VECTOR type / HeatWave ML — vector search & AI inside MySQL

JSON columns / multi-valued index / JSON_TABLE / X DevAPI — semi-structured data

InnoDB FTS / ngram CJK tokenizer / Boolean Mode — when enough, when to use ES

utf8mb4 / collation impact on index & sorting / Emoji storage — master charsets

Syntax, debugging, performance impact & best practices — to use or not

100+ frequently asked questions — index, transaction, lock, optimization, architecture

ROW_NUMBER / RANK / LAG / LEAD / SUM OVER — visual animated explanations

Recursive CTE / LATERAL / multi-table UPDATE / INSERT ON DUPLICATE — must-know

100 production-tested tuning tips — one-liner + executable SQL for each

Architecture / performance / ecosystem / use cases — the most thorough comparison

LTS policy changes, new defaults, deprecations, 9.x Innovation Track preview

5.7 to 8.0 to 8.4 upgrade path, compatibility checks, rollback plans

pt-query-digest / pt-online-schema-change / pt-table-checksum — essential DBA toolkit