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How Solaris ZFS Cache Management Differs From UFS and VxFS File Systems (Doc ID 1005367.1)

Last updated on APRIL 17, 2024

Applies to:

Solaris Operating System - Version 10 6/06 U2 and later
All Platforms

Goal

ZFS manages its cache differently to other filesystems such as: UFS and VxFS.  ZFS' use of kernel memory as a cache results in higher kernel memory allocation as compared to UFS and VxFS filesystems.  Monitoring a system with tools such as vmstat would report less free memory with ZFS and may lead to unnecessary support calls.

Solution

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