How to Fix "Nginx 504 Gateway Time-out" on Long Running Requests
A request that takes a while to process — a report generation, a large data export, a slow third-party API call — fails with a 504 instead of eventually...
Search
28 results for "Connection Pool"
How to Fix "MySQL Server Has Gone Away" Error During Query Execution
A query that was working fine suddenly fails mid-execution with MySQL claiming the server disappeared, even though MySQL is clearly still running and other...
How to Fix "Too Many Connections" Error in MySQL Production
Your application starts failing to connect to MySQL during peak traffic, and the server itself is rejecting new connections outright. This means every...
How to Fix "Too Many Open Files" Limit Error on Linux
Your application starts throwing errors under load, and the underlying cause is that it's hit the maximum number of file descriptors Linux allows it to have...
How to Resolve "database is locked" Error in Go GORM / SQLite
Your Go service using GORM with SQLite throws "database is locked" under any real concurrent load, even though the same queries work fine one at a time. SQLite...
Postgres "FATAL: Remaining Connection Slots Are Reserved for Non-Replication Superuser Connections"
This specific error means PostgreSQL has hit its max_connections limit for regular users, but is deliberately still reserving a small number of slots...
MySQL max_allowed_packet Size Exceeded on BLOB/TEXT Data
Large BLOB/TEXT data specifically tends to hit max_allowed_packet limits more often than typical row data, simply because these column types are exactly the...
MySQL "Too Many Connections," Accessing via the Dedicated Admin Port
MySQL 8.0.14 and later support a dedicated administrative connection port (extra_port), specifically designed to let a database administrator connect and...
Go http.Client Memory Leak Due to Missing resp.Body.Close()
A gradually growing memory footprint in a Go application making many HTTP requests is one of the most common Go memory leak patterns, and it almost always...