Hi,
did you read the following?
http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide
Currently, pool performance can degrade when a pool is very full and
filesystems are updated frequently, such as on a busy mail server.
Under these circumstances, keep pool space under 80%
eSX wrote:
We are tesing ZFS in OpenSolairs, write TBs data to ZFS, But when the
capacity is close to 90%, ZFS went into slowly. We do ls, rm, and write
something, those operation is so terrible. for example, we do ls in a
Directory which have about 4000 Directories, the time is about 5-10s!
