Re: [EXTERNAL] Re: Monitored PV limit?

[Aaron Brown via Tech-talk <tech-talk@aps.anl.gov>]

Hi Ralph,

That was exactly the limit I was experiencing. Changing that limit fixed the problem.

Ultimately I would create a different client to monitor a large number of PVs (I am currently working on creating a large scale data logger), but for now I just wanted to get a better understanding of how the client works and  make sure that the client I set up worked the way I wanted it to.

Thanks for the quick answer!

Aaron Brown

Detector Support Group

Jefferson Lab

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From: Ralph Lange <ralph.lange@gmx.de>
Sent: Friday, November 8, 2019 11:22 AM
To: EPICS Tech Talk <tech-talk@aps.anl.gov>
Cc: Aaron Brown <ambrown@jlab.org>
Subject: [EXTERNAL] Re: Monitored PV limit?

 

Hi Aaron,

Assuming you refer to the caMonitor example code that comes with Base: this is an example for how to use the CA client library. In its sources it sets (line 27)

#define MAX_PV 1000  

which is most probably the limit you are experiencing.

For monitoring 5000 values, a command line client does not sound like a reasonable tool. If you can give some more details on your use case, there might be better ways to get it done.

Cheers,
~Ralph

On Fri, 8 Nov 2019 at 17:09, Aaron Brown via Tech-talk <tech-talk@aps.anl.gov> wrote:

Hello All,

I have a list of roughly 5000 PVs that I would like to monitor, but when I run the "./caMonitor" program with the full list it seems to only monitor less than half of the list.

Is there a limit to the number of PVs that can be monitored using the example "./caMonitor" program?

Thanks for any help that can be offered,

Aaron Brown

Detector Support Group

Jefferson Lab