[Swift-devel] Re: bg/p /dev/shm slow filesystem acccess?

[Zhao Zhang]

Thanks, Ben

/dev/shm is ram disk, and from our experience, it should not be slow, I 
will investigate more about this.

zhao

Ben Clifford wrote:
> When we looked at wrapper log plots last week when I was at the CI, there 
> were some very simple steps (such as making a directory on the worker node 
> in-memory filesystem) that were being logged as taking a long time.
>
> This is something that I think is worth investigating. I can imagine at 
> least two possible causes:
>
> i) one is that logging is taking a very long time in comparison to such 
> operations.
>
> ii) another is that the /dev/shm filesystems actually are being slow.
>
> Both of those situations seem to be a cause for further 
> investigation/concern/characterisation.
>
>