By the way, in my experience, these leaks are caused by underlying "C" libraries or, occasionally, by failure of PIL to release graphics resource (such as font handles).
On Sun, Mar 29, 2020 at 3:09 PM Thomas Keffer <[email protected]> wrote: > I'm not following. I thought you said you could get rid of the leak by > doing the unsets. If so, is there still a problem? > > > On Sun, Mar 29, 2020 at 8:41 AM Lucas Heijst <[email protected]> wrote: > >> Tom, >> >> Currently running weewx 4.0.0b17 and analysing the memory leak in my pi31 >> system. >> On the system runs two weewx instances (mben and tfrc) and a 5-minute >> webcam cronjob. >> >> The memory leak of my webcam cronjob task was caused by creating >> variables like: >> WEBCAM_ID=3 >> CAMERA=picamera$WEBCAM_ID >> DATETIME=$(date +"%Y-%m-%d %H:%M:%S") >> EPOCH=$(date +"%s") >> ... >> >> The used memory is freed by: >> unset WEBCAM_ID >> unset CAMERA >> unset DATETIME >> unset EPOCH >> ... >> >> >> The memory leak of the weewx instances mben and tfrc are caused by the >> weewx reporting tasks, see data below: >> >> ----- >> used time >> mem >> ----- ----- >> 73348 10:30 >> 95504 11:07 >> 48576 11:38 no webcam, no mben, no tfrc (no increase of memory) >> 56136 11:41 mben without modbus read and modbus service >> 57384 11:43 >> 57876 11:44 >> 58360 11:45 >> 64836 11:47 used memory increased with 6476 due to mben31 report >> 64572 11:48 >> 64560 11:49 >> 64548 11:50 >> 66240 11:51 used memory increased with 1692 due to mben31 report >> 55808 11:53 mben without mben31 report >> 56092 11:54 >> 55828 11:55 >> 55808 11:56 >> 56000 11:57 >> 56000 11:58 >> 56516 11:59 >> 56772 12:00 >> 56164 12:02 mben now with modbus service (fully functional; without >> reporting) >> 56436 12:03 >> 55920 12:04 >> 76056 12:09 mben without mben31 report; tfrc started without tfrc31 report >> 76388 12:10 >> 77084 12:11 >> 77248 12:12 >> 77432 12:13 >> 77312 12:14 >> 76908 12:15 >> 76976 12:16 >> 77268 12:21 >> 77248 12:24 hardly any increase of used memory the last 15 minutes >> ----- >> >> When all reports are disabled, the memory leak on my system is >> practically zero. >> >> Attached the skin settings of mben31. >> >> Any clue how reduce this memory leak? >> >> Luc >> >> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-development" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/weewx-development/d91724fe-da46-4b4e-9913-59f55aa91657%40googlegroups.com >> <https://groups.google.com/d/msgid/weewx-development/d91724fe-da46-4b4e-9913-59f55aa91657%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/CAPq0zEBusZ0vLVJzOf3NpCXYsCKAHny7G5ZD0W5KxJ%2BukSyPSg%40mail.gmail.com.
