Experimental Physics and
Industrial Control System

Dave,  What version of autosave are you using?  Are any of the PV's
that autosave is monitoring updating very rapidly?  (In the most
common use of autosave, in which create_monitor_set() is called,
autosave puts a CA monitor on all of the PV's in the list, so it
will know if any have changed, and so it will have current values
when it's time to write a .sav file.)

Everyone...

We are currently running a Soft IOC on a Linux based PC, and are using
it to communicate to a Modicon PLC, using the Mark River's Modbus
software.  This IOC currently has ~4000 PV's on it.

A few months ago, we upgraded the epics software on this IOC to include
the Auto Save/Restore.  We are saving 258 PV's every 10 seconds, and an
additional 258 PV's every 10 minutes.

This has worked fine, but we have discovered that, over a few days, the
load steps from less than 1, on up to 5, with the CPU at %100.  We
never noticed this behavior prior to installing Auto Save/Restore, and
don't have this issue with any of our other IOC's.

Any thoughts/ideas on what may be causing this? Thanks...

Dave Reid
University of Washington Medical Center

--
Tim Mooney ([email protected]) (630)252-5417
Beamline Controls & Data Acquisition Group
Advanced Photon Source, Argonne National Lab.

References:

Auto Save/Restore issue... Dave Reid

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