Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 3 Nov 2016 10:27:33 -0500

Hi Murali,

On 11/02/2016 06:21 PM, Shankar, Murali wrote:
>>> The 3.15 branch does contain a major performance improvement to the IOC
>>> when loading large numbers of database records.
> 
> Awesome, I can load 100K PV's into a softIOC in a couple of seconds!
> Thank you so much!

If you are loading large numbers of records also make sure that you are
setting the size of the IOC's hash-table before dbLoadDatabase() or
dbLoadRecords() in your startup script. The size argument must be a
power of 2 up to 64K:
    dbPvdTableSize(65536)
The default size is 512, although we should probably increase that
nowadays. More hash buckets means more efficient name searches both at
load-time and by the CA name resolution task.

- Andrew

-- 
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System