[Info-vax] Problem with RWMPB

[Richard B. Gilbert]

Ian Dean wrote:
> Hi,
>     Whilst running an image, it hangs and shows a status of RWMPB (Modified 
> page writer busy).
> 
>     Can someone explain (in simplish terms) what is causing this and what 
> actions I can take to overcome this?
> 
> Regards,
>     Ian 
> 
> 

It's writing a whole lot of virtual memory to disk.  If you write even 
one byte to a whole bunch of pages you should expect this.  This can 
happen when you are "walking an array" in big steps.  Sometimes 
transposing rows and columns will let you run more efficiently. 
Sometimes you need to rewrite the program in "a more logical and 
straight foward manner."