A microservice team asked me for help with a mysterious issue. They claimed that the ZFS file system was consuming 30% of CPU capacity. I summarized this case study at Kernel Recipes in 2017. The microservice was for metrics ingestion and had recently updated their base OS image (BaseAMI). After doing so, they claimed that ZFS was now eating over 30% of CPU capacity.

Link: ZFS Is Mysteriously Eating My CPU
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