Hi Thomas,
thank you for your answer.
No, the MySQL database is not on the pi, it is externally hosted.

Am Mittwoch, 18. März 2020 12:16:20 UTC+1 schrieb Thomas Keffer:
>
> I take it you are running MySQL on a Raspberry Pi? Could be that the SD 
> card is failing.
>
> On Wed, Mar 18, 2020 at 12:23 AM Luftfahrtverein Grünstadt <
> [email protected] <javascript:>> wrote:
>
>> Hi all,
>>
>> after updating our raspberry pi (apt-get update & upgrade) I experience 
>> very bad performance of weewx resulting in an endless loop of retrying.
>> Here is an excerpt of the log:
>> Mar 18 08:10:18 raspberrypi weewx[467]: manager: Added record 2020-03-18 
>> 08:10:00 CET (1584515400) to database 'd0222d5f'
>> Mar 18 08:10:21 raspberrypi weewx[467]: manager: Added record 2020-03-18 
>> 08:10:00 CET (1584515400) to daily summary in 'd0222d5f'
>> Mar 18 08:11:00 raspberrypi weewx[467]: cheetahgenerator: Generated 8 
>> files for report SeasonsReport in 39.21 seconds
>> ^[[AMar 18 08:14:36 raspberrypi weewx[467]: imagegenerator: Generated 42 
>> images for SeasonsReport in 215.72 seconds
>> Mar 18 08:14:36 raspberrypi weewx[467]: copygenerator: copied 5 files to 
>> /var/www/html/weewx
>> Mar 18 08:14:40 raspberrypi weewx[467]: GaugeGenerator: Generated 7 
>> images for HTMLPages in 3.42 seconds
>> Mar 18 08:14:40 raspberrypi weewx[467]: translategenerator.pyc: Language 
>> is german
>> Mar 18 08:14:48 raspberrypi weewx[467]: historygenerator.pyc: Generated 6 
>> tables in 7.08 seconds
>> Mar 18 08:15:02 raspberrypi weewx[467]: engine: Main loop exiting. 
>> Shutting engine down.
>> Mar 18 08:15:02 raspberrypi weewx[467]: engine: Shutting down StdReport 
>> thread
>> Mar 18 08:15:14 raspberrypi weewx[467]: cheetahgenerator: Generated 10 
>> files for report HTMLPages in 33.72 seconds
>> Mar 18 08:15:14 raspberrypi weewx[467]: copygenerator: copied 3 files to 
>> /var/www/html/weewx/Bootstrap
>> Mar 18 08:15:14 raspberrypi weewx[467]: translategenerator.pyc: Language 
>> is german
>> Mar 18 08:15:22 raspberrypi weewx[467]: engine: Unable to shut down 
>> StdReport thread
>> Mar 18 08:15:22 raspberrypi weewx[467]: engine: Database connection 
>> exception: (2013, 'Lost connection to MySQL server during query')
>> Mar 18 08:15:22 raspberrypi weewx[467]:     ****  Waiting 2 minutes then 
>> retrying...
>>
>>
>> As you can see generating images / files took very very long (e.g. 215 
>> seconds for seasonsreport). I successfully run weewx for 4 years now and It 
>> was never that slow.
>> A few weeks ago I moved from sqlite to mysql without any issues and it 
>> worked well, so I do not hink this has any relation to the problem.
>>
>> In addition to the bad performance (i think it is a folllow-up problem) I 
>> got database connection exceptions (2013, lost connection during query), 
>> but adding records to the database work fine. Is there a way to set a 
>> higher connection timeout value?
>>
>> I tried already rebuilding the daily values several times, setting the 
>> archive interval to 5 min (before it was 1 min) but nothing helps.
>>
>> Any help is really appreciated! What do you need to know?
>>
>> Thank you so much!
>>
>> Sebastian
>>
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>>
>

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