PostgreSQL too many clients already: 30-second triage recovery runbook
Use a 30-second triage table to classify PostgreSQL FATAL: sorry, too many clients already as a spike, leak, or misconfig, then recover immediately with copy-paste SQL—terminate idle in transaction, tune max_connections, and decide on pgbou
Jul 13
Fixing ERROR 1040 Too many connections: A MySQL Connection Exhaustion Diagnosis and Recovery Runbook
A runbook to diagnose MySQL ERROR 1040 Too many connections in 30 seconds and recover immediately. Copy-paste guide covering SHOW PROCESSLIST and kill, through max_connections and wait_timeout, to HikariCP, Django, and Laravel pool settings
Jul 12
Fixing MySQL "Deadlock found" Errors: A Guide to Analyzing INNODB STATUS Logs
Diagnose MySQL "Deadlock found when trying to get lock" errors in five minutes using SHOW ENGINE INNODB STATUS logs. Covers scenario-specific fixes for missing indexes, lock-order collisions, and foreign-key deadlocks, plus 1213 retry code.
Jun 20