We have an X4540 running Solaris 11 Express snv_151a that has developed an issue where its write performance is absolutely abysmal. Even touching a file takes over five seconds both locally and remotely.
/pool1/data# time touch foo real 0m5.305s user 0m0.001s sys 0m0.004s /pool1/data# time rm foo real 0m5.912s user 0m0.001s sys 0m0.005s The system exhibits this issue under the slightest load. We have sync=disabled set on all filesystems in this pool. The pool is at 75% capacity and is healthy. This issue started suddenly several days ago and persists after reboot. prstat shows zpool-pool1/150 taking 10% CPU constantly whereas other similar systems in our infrastructure under the same load do not. Even doing a 'zfs set' on a property takes up to 10 seconds and on other systems is instantaneous. Something appears to be blocking internally. Both iostat and zpool iostat show very little to zero load on the devices even while blocking. Any suggestions on avenues of approach for troubleshooting? Thanks, Adam _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
