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marceldarvas / backblaze-bzserv-memory-leak.md
Created April 22, 2026 22:56
Backblaze bzserv memory leak on macOS — diagnosis, remediation, and a daily launchd workaround

Backblaze bzserv Memory Leak — Runbook (macOS)

A workaround and diagnosis guide for a memory leak in Backblaze Personal Backup's bzserv process that quietly fills macOS swap until the system runs out of application memory.

Symptoms

  • Activity Monitor shows Backblaze using tens of GB of memory.
  • sysctl vm.swapusage reports swap climbing into the 20–60 GB range over a few