[Info-vax] What choices are available to the OpenVMS Process Scheduler once all the CPUs are in use?

[Stephen Hoffman]

On 2016-02-11 04:28:22 +0000, sean at obanion.us said:

> There was an application code change in the middle of Dec., and we 
> included the OpenSSL patch, and have found the CUR Queue change from 
> that date.
> 
> Regarding OpenSSL, we believe that Cache is using the OpenSSL libraries 
> for encryption.There are several hundred processes communicating to a 
> number of internal servers that are using AES encryption that we may 
> take to no encryption and move to an isolated, non-routing subnet on 
> our testing system. The other application code changes are being 
> evaluated.

Seems your applications and/or SSL and/or something else that changed 
here has caused your already-pretty-busy system to become more-busy.
Get some T4 data collections going, and see what that shows for trends.
Unfortunately, looking at the scheduler is not going to get you more computes.
Probably time to start figuring out what to tune and what to upgrade, 
if your current trends are increasing or if your expected load will be 
increasing.
That might be the server, or maybe an SSL offload, or some other detail 
that the T4 and related data might point to.   Or the box is just too 
busy.


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