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How To Increase The Size Of The Solaris Fibre Channel Protocol (fcp) Driver Kernel Trace Circular Event Buffer (Doc ID 2848370.1)

Last updated on OCTOBER 11, 2023

Applies to:

Solaris Operating System - Version 10 to 11.4 [Release 10.0 to 11.0]
Solaris x64/x86 Operating System - Version 10 to 11.4 [Release 10.0 to 11.0]
Information in this document applies to any platform.


The Solaris Fibre Channel Protocol (fcp) driver kernel trace circular event buffer is critical for troubleshooting Fibre Channel device discovery as well as LUN offline and online events. By default, 1MB is allocated to the buffer. For configurations where more than a moderate number of Fibre Channel devices (20) and/or paths (4) are provisioned, it is recommended the size of the buffer is increased to prevent critical events from being over written by wrapping of the circular event buffer.


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