 28 Aug 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Stefan,
thanks for you quick reply.
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28 Aug 2019, lcp, Forum, History plot problems for frontend with multiple indicies
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hi,
> > That makes things more
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29 Aug 2019, Ben Smith, Forum, History plot problems for frontend with multiple indicies
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Hi Nick,
I confirm that this issue appears when using the MIDAS history driver. The issue does not appear when using the MYSQL history driver.
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29 Aug 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi LCP,
thanks for the suggestion and link. Unfortunatly I don't think this explains it. |
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29 Aug 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Ben,
thanks for your reply. I can confirm that your suggested workaround does indeed |
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01 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Ben,
thanks for your reply. I can confirm that your suggested workaround does indeed
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16 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> My first question would be why are you using several font-ends at all? That makes things more
> complicated than needed. In the normal FE framework, you can define either several equipment
> served by one frontend, or even one equipment linked to several devices.
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16 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> it's probably better to run a multi-threaded setup, than individual frontends.
I recommend against using multiple threads if at all possible and unless absolutely required.
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16 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> thanks for your reply. I can confirm that your suggested workaround does indeed
> make the problem dissapear.
> I guess this issue hasn't been seen at T2K since we use MYSQL for the history.
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16 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Konstantin,
thanks for your reply.
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17 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> [local:e666:S]History>ls -l /History/Events
> Key name Type #Val Size Last Opn Mode Value
> ---------------------------------------------------------------------------
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18 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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> > [local:e666:S]History>ls -l /History/Events
> > Key name Type #Val Size Last Opn Mode Value
> > --------------------------------------------------------------------------- |
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18 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Konstantin,
> > [local:e666:S]History>ls -l /History/Events
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27 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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We should fix this for midas-2019-10.
https://bitbucket.org/tmidas/midas/issues/193/confusion-in-history-event-ids
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24 Aug 2020, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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This turned out to be a tricky problem. I am adding a warning about it in mlogger. This should go into midas-
2020-07. Closing bug #193. K.O.
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 19 Nov 2020, Joseph McKenna, Forum, History plot consuming too much memory
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A user reported an issue that if they were to plot some history data from
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19 Nov 2020, Stefan Ritt, Forum, History plot consuming too much memory
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The history code is right now programmes in such a way that when you request
an old time window, then all data from that window until the present date
gets loaded. When we implemented that, this worked fine for data ranges of
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20 Nov 2020, Joseph McKenna, Forum, History plot consuming too much memory
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Poking at the behavior of this, its fairly clear the slow response is from the data
being loaded off an HDD, when we upgrade this system we will allocate enough SSD
storage for the histories.
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20 Nov 2020, Stefan Ritt, Forum, History plot consuming too much memory
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> Taking this down a tangent, I have a mild concern that a user could temporarily
> flood our gigabit network if we do have faster disks to read the history data. Have
> there been any plans or thoughts on limiting the bandwidth users can pull from
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27 Nov 2020, Konstantin Olchanski, Forum, History plot consuming too much memory
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>
> Tested with midas-2020-08-a up until the HEAD of develop
>
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