[Info-vax] DNFS1ACP using 100% of CPU

[Stephen Hoffman]

On 2013-10-11 21:55:16 +0000, milton.baar at swoose.com.au said:

> Thanks Hoff, yes this is a hobbyist system, but it is running a web 
> server that is heavily hit, the web pages are sourced from an OSX 
> server via NFS.

I'd reverse that, and run the web server directly from the OS X Server 
system.  Mac Mini boxes are quite good for web services, and small and 
quiet.  But then I'm guessing you have some VMS-isms, so maybe a 
reverse-proxy configuration from OS X Server to OpenVMS and WASD gets 
you where you want?

> As I noted in a later reply, changing MPW_HILIMIT and MPW_WAITLIMIT has 
> removed all the paging and just left me with 98-100% CPU activity every 
> minute or so.  At the same time, the system goes into 99% User mode 
> activity.

That's still a bug, unless the web server is getting pushed hard.

And if it is, then caching might be a viable approach.

<http://wasd.vsm.com.au/DOC/CONFIG/CONFIG_1100.HTML>

> So, my guess is that the RMS/NFS interface eventually gets swamped by 
> the number of requests it has to process and convert.  But hey, the 
> *only* thing the system is doing is serving web pages via WASD, so if 
> the CPU wants to spend nearly 100% of its time facilitating that, 
> well.....there is nothing else for it to do!  It has been running like 
> this for 10 days without any other side effects....at least once I 
> stopped the paging.

That wouldn't be my choice, but then it's your box.



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