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UFS performance of Solaris 11.4 is worse than that of Solaris 10 (Doc ID 2815940.1)

Last updated on DECEMBER 13, 2023

Applies to:

Solaris Operating System - Version 11 to 11.4 [Release 11.0]
Information in this document applies to any platform.


The customer has reported that UFS performance on Solaris 11.4 is worse than on Solaris 10.
When a simple test model was created and verified, the following results were obtained.

Hardware is the same for Solaris 10 and Solaris 11.4 environments, 72 UFS filesystems are in use.

For SunOS 5.10 Generic_150400-59 environment
Average business test execution time: 8 minutes 42 seconds

For SunOS environment
Average  business test execution time: 12 minutes 7 seconds

Contents of the simple test model:
 30 multiple executions of $ / usr / bin / cp <source_file> <target_file>
 $ cp AA aa & cp BB bb & cp CC cc & cp DD dd & ... (30 multiplex in total)

The following differences were found in the Solaris 11.4 environment, lockstat -C:

There were no singularities in the Solaris 10 environment.


The customer upgraded from Solaris 10 to Solaris and then to


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