[zfs-discuss] extreme load average for ZFS-intensive tasks

Edward Ned Harvey (zfsonlinux) zfsonlinux at nedharvey.com
Sat Apr 9 07:33:29 EDT 2016


> From: zfs-discuss [mailto:zfs-discuss-bounces at list.zfsonlinux.org] On Behalf
> Of Ben Kurtz via zfs-discuss
> 
> Some configuration details:
> * Ubuntu 14.04 with Linux 3.19 kernel
> * 8GB RAM
> * no deduplication
> * 18 6TB disks in two RAIDZ1 vdevs (9 disks each)
> * Attached via HighPoint r750 HBA
> * pool is around 50% full
> * a month ago, (albeit with only one user actively using the system at that
> point), thing seemed to be working normally; scrub speeds ~500 MB/sec,
> load averages reasonable.

Do you have gzip compression enabled? The other compression algorithms should be fine, but gzip is CPU-intensive.


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