Go to main content

Managing File Systems in Oracle® Solaris 11.4

Exit Print View

Updated: November 2020

Tuning UFS File System Performance Using tunefs

UFS provides the tunefs tool which enables you to modify some pf the performance related parameters of a file system. The parameters that can be modified are:

  • The maximum number of logical blocks, belonging to one file, that is allocated contiguously. Contiguously allocated regions enable more data to be transferred in one I/O request. The value can be set to any positive integer number. The actual value will be the lesser of what has been specified and what the hardware supports.

  • The maximum number of contiguous logical blocks any single file can allocate from a cylinder group.

  • The minimum free space threshold, or the percentage of space held back from normal users.

For more information, see Customizing UFS File System Parameters and the tunefs(8) man page.