In have an area, that I'm guarding with zm, but due to sun light changes it gives me a lot of false alarms.
So, I'm changing MinPixelThreshold field in Zones table during the time of the day.
I noticed that killing -HUP zma pids doesn't reload the new MinPixelThreshold settings from the db. Neither does with -TERM.
Restarting zm with zmpkg.pl does the trick, but this gives a small downtime (~ 10 seconds).
Looking in the src I can see, for example, that HUP signal triggers eventually ReloadZones() -> Zone::Load() which reloads all zone settings, but in my case I don't think that it does. Am I I correct or I'm missing something?
Btw, I have version 1.24.2 (ubuntu 11.04 package).
I've also tried a different approach, by using the zmdc.
First, I enabled the debug mode and then I restarted zma with zmdc. For example: zmdc.pl restart zma -m 4
Then, I checked the debug log for MnAT (I suppose this is the MinPixelThreshold value):
/tmp/zm_debug.log.16145:04/22/12 14:01:19.799402 zma_m4.DB1-zm_zone.cpp/50 [Initialised zone 30/top_area - 1 - 215x231 - Rgb:ff0000, CM:3, MnAT:25, MxAT:0, MnAP:3746, MxAP:0, FB:3x3, MnFP:2809, MxFP:0, MnBS:2341, MxBS:0, MnB:1, MxB:0, OF: 0]
, but it doesn't change.
It changes only if I restart zma with zmdc 2-3 times.
My guess is that I'm missing something. So, the question is, what's the safest way to change MinPixelThreshold value from db directly and the have it applied in zma processes?
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