 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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27 Nov 2020, Konstantin Olchanski, Forum, History plot consuming too much memory
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>
> With the current code, we are limited to loading history data up to 50% of
> the javascript memory limit.
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27 Nov 2020, Konstantin Olchanski, Forum, History plot consuming too much memory
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>
> Are you sure that the delay comes from the browser or actually from mhttpd
> digging through GBytes of history data?
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27 Nov 2020, Konstantin Olchanski, 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.
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 07 Feb 2019, Stefan Ritt, Info, History panels in custom pages 
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A new tag has been implemented to display history panels in custom pages, integrated in the
new custom page design from 2017. The full documentation can be found at
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08 Feb 2019, Thomas Lindner, Info, History panels in custom pages
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> A new tag has been implemented to display history panels in custom pages, integrated in the
> new custom page design from 2017. The full documentation can be found at
>
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12 Sep 2019, Pintaudi Giorgio, Info, History panels in custom pages
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> > A new tag has been implemented to display history panels in custom pages, integrated in the
> > new custom page design from 2017. The full documentation can be found at
> >
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12 Sep 2019, Stefan Ritt, Info, History panels in custom pages
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Indeed there was a bug in some JavaScript code, which I fixed here: https://bitbucket.org/tmidas/midas/commits/d2b1a783240e252820c622001e15c09c5d7798c0
Note that your code will bring you the "old style" history panels (with GIF images). If you want the new style (interactive canvas panels), you need the |
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13 Sep 2019, Pintaudi Giorgio, Info, History panels in custom pages
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Dear Stefan,
thank you very much for the prompt reply. Your suggestions worked wonderfully. Now I can display all the plots that I want where I want.
The new JavaScript history plots are really a huge improvement over the old ones.
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12 May 2021, Pierre Gorel, Bug Report, History formula not correctly managed
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OS: OSX 10.14.6 Mojave
MIDAS: Downloaded from repo on April 2021.
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02 Jun 2021, Konstantin Olchanski, Bug Report, History formula not correctly managed
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> OS: OSX 10.14.6 Mojave
> MIDAS: Downloaded from repo on April 2021.
>
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06 Oct 2019, Nik Berger, Bug Report, History data size mismatch
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Logging a list of variables to the history via links in the history ODB subtree,
we get messages as follows at every run start:
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06 Oct 2019, Stefan Ritt, Bug Report, History data size mismatch
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I wonder why do you this via ODB links. The "standard" way of writing to the history should be to create events for an equipment and flag this equipment
as being written to the
history. All variables under /Equipment/<name>/Variables then automatically go into the history and you don't have to worry about ODB links. Only variables |
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10 Oct 2019, Konstantin Olchanski, Bug Report, History data size mismatch
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>
> In our history, a long list of doubles (64 Bit) fas followed by three floats (32 bit)
>
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10 Oct 2019, Nik Berger, Bug Report, History data size mismatch
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>I wonder why do you this via ODB links. The "standard" way of writing to the history should be to create events for an equipment and flag this equipment
as being written to the
>history. All variables under /Equipment/<name>/Variables then automatically go into the history and you don't have to worry about ODB links. Only variables |
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10 Oct 2019, Stefan Ritt, Bug Report, History data size mismatch
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> Yes, we could have
> kept that apart, yes, in this case a double would also work (and not break things), but a bug is a bug...
> I could think of senisble use cases where doubles and ints are mixed and I also know quite a few areas where it makes
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23 Mar 2008, Konstantin Olchanski, Info, History SQL database poll: MySQL, PgSQL, ODBC?
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I would like to hear from potential users on which SQL database would be
preferable for storage of MIDAS history data.
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