Comment on Running PostgreSQL on Compression-enabled ZFSparentComments−cwsteinbachOP13y> as ZFS is likely caching the reads in the ARCEach of the seven queries we used in our benchmark required a sequential scan of the 32GB dataset. It's unlikely that the ARC had any impact on the results since the EC2 instance had only 7GiB of memory.
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> as ZFS is likely caching the reads in the ARC
Each of the seven queries we used in our benchmark required a sequential scan of the 32GB dataset. It's unlikely that the ARC had any impact on the results since the EC2 instance had only 7GiB of memory.