Excessive fsflush happening on SunOS and Solaris

Symptom

Your domain is taking longer than you expect, vmstat shows lots of disk activity, and you find fsflush in the process table (and fsflush is showing lots of cpu usage).

Cause

Your pamskmem (memory) files may not reside on a tmpfs file system.

Fix

Under SunOS 4.x and Solaris 2.x, you can avoid the performance hit of periodic fsflush "sync to disk" operations by putting the pamskmem file on a tmpfs file system. For more information on this type of file system, see the tmpfs man page in section 4S for SunOS 4.1.3 or section 7 for Solaris 2.3.

Here is how to tell whether your pamskmem file is in a tmpfs directory:

look for "tmp" as the descriptor in /etc/fstab file under SunOS 4.1.3
look for "tmpfs" as the descriptor in /etc/vfstab file under Solaris 2.3

Date last changed: 1995 July 17

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