database breakpoint, dbb(), and large linksets

[John Dobbins <john.dobbins@cornell.edu>]

Greetings,

I am wondering if anyone has experience setting database breakpoints on 
large locksets?

I had not used dbb() until recently when someone here tried to use it on 
a particular record and it failed. In particular the IOC stopped 
communicating via Channel Access, though the console continued to 
respond to for example dbl. If I then try the command dbstat the console 
stops responding.

Further testing revealed that dbb worked for some records in the IOC but 
not for others. In particular large linksets seemed to be a problem. I 
tried a second IOC (different device types) and this was true there 
also. I can't give a specific linkset size, it seems to work fine for a 
few tens of records in a link set. I took a large linkset and trimmed it 
until it worked. Adding back one record could reproducibly cause it to 
then fail.

Any advice appreciated.

Regards,

John Dobbins

Cornell Laboratory for Accelerator-based Sciences and Education