Whats the default size of the file system cache for Solaris 10 x86 and can it be tuned? I read various posts on the subject and its confusing.. -- This message posted from opensolaris.org
James C. McPherson
2010-Apr-28 01:16 UTC
[zfs-discuss] Solaris 10 default caching segmap/vpm size
On 28/04/10 11:07 AM, Brad wrote:> Whats the default size of the file system cache for Solaris 10 x86 and can it be tuned? > I read various posts on the subject and its confusing..http://dlc.sun.com/osol/docs/content/SOLTUNEPARAMREF/soltuneparamref.html should have all the answers you need. Note that not all of those will be applicable for ZFS. You should read the ZFS Best Practices Guide http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide and the ZFS Config Guide too http://www.solarisinternals.com/wiki/index.php/ZFS_Configuration_Guide James C. McPherson -- Senior Software Engineer, Solaris Oracle http://www.jmcp.homeunix.com/blog
ZFS does not use segmap. The ZFS ARC (Adaptive Replacement Cache) will consume what''s available, memory-wise, based on the workload. There''s an upper limit if zfs_arc_max has not been set, but I forget what it is. If other memory consumers (applications, other kernel subsystems) need memory, ZFS will release memory being used by the ARC. But, if no one else wants it.... /jim On Apr 27, 2010, at 9:07 PM, Brad wrote:> Whats the default size of the file system cache for Solaris 10 x86 and can it be tuned? > I read various posts on the subject and its confusing.. > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss