My Oracle Support Banner

ZFS writes slow with calls to arc_buf_alloc_hole()->arc_cksum_compute() (Doc ID 1988439.1)

Last updated on JUNE 22, 2020

Applies to:

Solaris Operating System - Version 10 9/10 U9 to 11.2 [Release 10.0 to 11.0]
Information in this document applies to any platform.


File write on ZFS dataset is observed to be slow. Profiling data will show that there are frequent calls into arc_buf_cksum_compute().

The write() system call calls arc_buf_alloc_hole()->arc_cksum_compute(), resulting in write latency.




Customer has recently applied zfs patch 150125-03 (sparc) or 149637-03 (x86) or later, but without 150400-21(sparc) or 150401-21(x86).


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.