zfs, a directory that used to hold lot of files and listing pause

[Eugene M. Zheganin]

Hi.

On 21.10.2016 15:20, Slawa Olhovchenkov wrote:
>
> ZFS prefetch affect performance dpeneds of workload (independed of RAM
> size): for some workloads wins, for some workloads lose (for my
> workload prefetch is lose and manualy disabled with 128GB RAM).
>
> Anyway, this system have only 24MB in ARC by 2.3GB free, this is may
> be too low for this workload.
You mean - "for getting a list of a directory with 20 subdirectories" ? 
Why then does only this directory have this issue with pause, not 
/usr/ports/..., which has more directories in it ?

(and yes, /usr/ports/www isn't empty and holds 2410 entities)

/usr/bin/time -h ls -1 /usr/ports/www
[...]
0.14s real              0.00s user              0.00s sys

Thanks.
Eugene.