Hi John/Tom - many thanks to you both.
On the server instance: running on normal PC hardware, 16GB RAM, Ubuntu
Server (think 20.04). I wrote "-1000" to /proc/PROC_ID/oom_score_adj - and
we'll see what happens from here. Server mainly used for internal websites,
also runs Ubiquiti Unifi Controller.
Tom - I had thought I needed the WLL to serve data to weewx over the LAN,
so figured [WeatherLinkLive] in weewx.conf. Have just now checked the file
and I have both [Vantage] and [WeatherLinkLive] sections configured. It
sounds as if I could remove the WeatherLink one? Am remembering I used a
plugin initially to link to the WLL, maybe that's obsolete now.
Both sections copied in below from conf file.
Thanks - JW
[Vantage]
# This section is for the Davis Vantage series of weather stations.
# Connection type: serial or ethernet
# serial (the classic VantagePro)
# ethernet (the WeatherLinkIP or Serial-Ethernet bridge)
type = ethernet
# If the connection type is serial, a port must be specified:
# Debian, Ubuntu, Redhat, Fedora, and SuSE:
# /dev/ttyUSB0 is a common USB port name
# /dev/ttyS0 is a common serial port name
# BSD:
# /dev/cuaU0 is a common serial port name
port = /dev/ttyUSB0
# If the connection type is ethernet, an IP Address/hostname is
required:
host = 192.168.1.210
######################################################
# The rest of this section rarely needs any attention.
# You can safely leave it "as is."
######################################################
# Serial baud rate (usually 19200)
baudrate = 19200
# TCP port (when using the WeatherLinkIP)
tcp_port = 22222
# TCP send delay (when using the WeatherLinkIP):
tcp_send_delay = 0.5
# The type of LOOP packet to request: 1 = LOOP1; 2 = LOOP2; 3 = both
loop_request = 1
# The id of your ISS station (usually 1). If you use a wind meter
connected
# to a anemometer transmitter kit, use its id
iss_id = 1
# How long to wait for a response from the station before giving up (in
# seconds; must be greater than 2)
timeout = 4
# How long to wait before trying again (in seconds)
wait_before_retry = 1.2
# How many times to try before giving up:
max_tries = 4
# Vantage model Type: 1 = Vantage Pro; 2 = Vantage Pro2
model_type = 2
# The driver to use:
driver = weewx.drivers.vantage
......
[WeatherLinkLive]
driver = user.weatherlink_live
host = 192.168.1.210
polling_interval = 10
mapping = th:1, th_indoor, baro, rain:1, wind:1, thw:1, thsw:1,
windchill:1
On Mon, Sep 19, 2022 at 9:38 PM Tom Keffer <[email protected]> wrote:
> I agree with John that this is an out-of-memory problem, but I wonder why
> you are getting the offset in humidity during the down time. Is this an
> artifact of using WeatherLinkLive? Indeed, why are you using WLL? Why not
> just go to the VP2 directly?
>
> On Mon, Sep 19, 2022 at 6:25 PM 'John Kline' via weewx-user <
> [email protected]> wrote:
>
>> Correction, the file is /proc/<pid-of-weewx-process>/oom-score-adj
>>
>> On Sep 19, 2022, at 6:23 PM, John Kline <[email protected]> wrote:
>>
>>
>> It doesn’t look like you are losing the connection to your Vantage Pro2.
>> Rather, the kernel is killing WeeWX because you’re running of of memory.
>>
>> You could write -1000 to the /proc/<pid-of-weewx-process>/oom-kill-adj
>> file to keep it from killing WeeWX, but then something else will be killed
>> to free up memory.
>>
>> What are you running WeeWX on? How much memory? What else is running?
>>
>> On Sep 19, 2022, at 6:10 PM, Johnnie Walker <[email protected]> wrote:
>>
>> Hi,
>> I'd had a recurring issue for some months that the weewx service loses
>> connection to my Davis Vantage Pro2 / WeatherLink. Basic solution has been
>> to reboot which brings things back into action, although I lose the data
>> for the period during which the problem occurred. Shows up as breaks in the
>> charts (for example):
>> [image: dayhum.png]
>> I have some breaks that are 1-2 days or more if I was on travel and
>> didn't realize until I returned.
>> I just took time to search /var/log/syslog for the instance that happened
>> today - log is copied in below. And it looks like an out of memory error,
>> so the process is killed. (Log is grep'd for "weewx" , I copied in the log
>> info grep'd "oom" further below). The log entries around 16:12 and after
>> are when I rebooted the server.
>> I installed weewx well over 2 years ago so can't recollect how I
>> installed. I can post the weewx.conf file if needed.
>> Could anyone give me a pointer on how to fix, and is there a way to patch
>> up the missing data sections?
>> Thanks very much - JW
>>
>> *"weewx"*
>>
>> Sep 19 15:38:31 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> poll packet
>> Sep 19 15:38:31 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> push (broadcast) packet
>> Sep 19 15:38:38 sparta weewx[1081] message repeated 4 times: [ INFO
>> user.weatherlink_live: Emitting push (broadcast) packet]
>> Sep 19 15:38:41 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> poll packet
>> Sep 19 15:38:41 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> push (broadcast) packet
>> Sep 19 15:38:51 sparta weewx[1081] message repeated 4 times: [ INFO
>> user.weatherlink_live: Emitting push (broadcast) packet]
>> Sep 19 15:38:51 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> poll packet
>> Sep 19 15:38:53 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> push (broadcast) packet
>> Sep 19 15:39:01 sparta weewx[1081] message repeated 3 times: [ INFO
>> user.weatherlink_live: Emitting push (broadcast) packet]
>> Sep 19 15:39:01 sparta weewx[1081] INFO user.weatherlink_live: Emitting
>> poll packet
>> *Sep 19 15:39:02 sparta kernel: [1192066.955832]
>> oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=23c2c8bc241e51af783d9abaf3b8008403f4099db600e63a6284359bda22502e,mems_allowed=0,global_oom,task_memcg=/system.slice/weewx.service,task=python3,pid=1081,uid=0*
>> Sep 19 16:12:45 sparta systemd[1]: Starting LSB: weewx weather system...
>> Sep 19 16:12:45 sparta weewx[907]: * Starting weewx weather system weewx
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: Initializing weewx
>> version 4.8.0
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: Using Python 3.8.10
>> (default, Jun 22 2022, 20:18:18) #012[GCC 9.4.0]
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: Platform
>> Linux-5.4.0-125-generic-x86_64-with-glibc2.29
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: Locale is 'C.UTF-8'
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: Using configuration
>> file /etc/weewx/weewx.conf
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: Debug is 0
>> Sep 19 16:12:46 sparta weewx[1003] INFO __main__: PID file is
>> /var/run/weewx.pid
>> Sep 19 16:12:46 sparta weewx[1090] INFO weewx.engine: Loading station
>> type WeatherLinkLive (user.weatherlink_live)
>> Sep 19 16:12:46 sparta weewx[907]: ...done.
>> Sep 19 16:12:46 sparta systemd[1]: Started LSB: weewx weather system.
>>
>> *"oom"*
>>
>> Sep 19 15:39:02 sparta kernel: [1192066.955659] python3 invoked
>> oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0,
>> oom_score_adj=0
>> Sep 19 15:39:02 sparta kernel: [1192066.955672]
>> oom_kill_process.cold+0xb/0x10
>> Sep 19 15:39:02 sparta kernel: [1192066.955745] [ pid ] uid tgid
>> total_vm rss pgtables_bytes swapents oom_score_adj name
>> Sep 19 15:39:02 sparta kernel: [1192066.955832]
>> oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=23c2c8bc241e51af783d9abaf3b8008403f4099db600e63a6284359bda22502e,mems_allowed=0,global_oom,task_memcg=/system.slice/weewx.service,task=python3,pid=1081,uid=0
>> Sep 19 15:39:02 sparta kernel: [1192066.955996] Out of memory: Killed
>> process 1081 (python3) total-vm:21086716kB, anon-rss:14282388kB,
>> file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:36056kB oom_score_adj:0
>>
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>> .
>> [image: dayhum.png]
>>
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