Thanks. So how do the victims know where they are inducing that new issue 
or how they can disable the new behavior if theywere happy in v4? Would a 
feature flag be possible ?

On Thursday, January 18, 2024 at 1:55:51 PM UTC-8 Tom Keffer wrote:

> Sorry. "Synthetic" isn't the best word.
>
> What I mean are plots and statistics of derived types, such as ET or, for 
> some hardware, windchill. In previous versions of WeeWX they were not first 
> class citizens. For example, only types that appeared in the database could 
> be plotted. Now if there's an xtype formula for them, they can be plotted. 
> But, that can take a lot of processing power.
>
> On Thu, Jan 18, 2024 at 11:30 AM vince <vince...@gmail.com> wrote:
>
>> Dunno.  Tom uses the term 'synthetic' but that is not in any docs I can 
>> find.  I can find it only twice in some tests buried in the git repo.
>>
>> On Thursday, January 18, 2024 at 11:10:02 AM UTC-8 bell...@gmail.com 
>> wrote:
>>
>>> Vince,
>>> Does this help?
>>> http://www.weewx.com/docs/5.0/reference/weewx-options/stdwxcalculate/
>>> rich
>>> On Thursday 18 January 2024 at 13:37:05 UTC-5 vince wrote:
>>>
>>>> Tom - can you point us to where 'synthetic types' are documented in 
>>>> layman's terms so we know how to look for them ?
>>>>
>>>> The pattern so far seems to be (a) Belchertown and (b) certain drivers 
>>>> that might not have complete measurement sets.   I see Acurite and 
>>>> Interceptor in a couple reports if I remember correctly.
>>>>
>>>> I did a post yesterday with some timings for v5 pip + 'unaltered' 
>>>> Belchertown on a pi3+ vs 17+ years of old (vp2) and a little new 
>>>> (simulator) data that showed that v5+Belchertown seem to work ok if you 
>>>> have relatively complete data in the db.  I have to guess the systems 
>>>> having problems have something that is now being calculated in v5 that 
>>>> wasn't calculated before (maybe ET or something solar?) but that's just a 
>>>> guess.
>>>>
>>>> Can the problem reporters point us to a working website so we can see 
>>>> their Belchertown web pages etc. ?
>>>>
>>>> On Thursday, January 18, 2024 at 5:33:26 AM UTC-8 Tom Keffer wrote:
>>>>
>>>>> I don't really want to debug Pat's file. It's huge and, as you say, 
>>>>> does things in a very non-standard way. I was hoping someone more 
>>>>> familiar 
>>>>> with it (Pat?) could take a look.
>>>>>
>>>>> On Thu, Jan 18, 2024 at 5:23 AM Karen K <kk44...@gmail.com> wrote:
>>>>>
>>>>>> @Tom: May be, you want to have a look into the belchertown.py file. 
>>>>>> It contains a lot of SQL queries, that do not use the normal way to 
>>>>>> access 
>>>>>> the WeeWX database. They are used to get several alltime statistics and 
>>>>>> other aggregations. Could there be some reason? 
>>>>>>
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