Valkey 9.2's forkless BGSAVE cuts my memory spike from 350MB to 10MB

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Every BGSAVE I have ever watched on a busy Redis or Valkey instance does the same thing: the process forks, and for a few seconds the host's free memory drops like someone pulled a plug. Valkey 9.2.0-rc1, tagged on Docker Hub on 16 September, adds a way to skip the fork entirely. I wanted to know what that actually buys you, not what the release notes say it buys you, so I ran both paths against the same dataset and measured what happened. The short version: the memory spike nearly disappeared, and the save got noticeably slower doing it. I pulled valkey/valkey:9.2.0-rc1 and ran two containers

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