Leak and Seek: A Go Runtime Mystery

Cyolo's R&D team tackled a significant memory leak issue in a Go application, which led to performance problems for several major customers. Initial debugging ruled out goroutine leaks, pointing instead to the SQLite3 driver. Further investigation traced the leak to the Go runtime's finalizer mechanism, which was blocked by the go-smb2 package, causing memory retention. The team's persistence and detailed analysis uncovered the root cause and led to implementing a monitoring solution to detect blocked finalizers, contributing valuable insights to the Go community.