 20 Mar 2025, Konstantin Olchanski, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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I think I added the cache size correctly:
{"Trigger", /* equipment name */
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20 Mar 2025, Konstantin Olchanski, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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the main purpose of the event buffer write cache is to prevent high contention for the
event buffer shared memory semaphore in the pathological case of very high rate of very
small events.
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20 Mar 2025, Konstantin Olchanski, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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> the main purpose of the event buffer write cache
how to control the write cache size:
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20 Mar 2025, Konstantin Olchanski, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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> > the main purpose of the event buffer write cache
> how to control the write cache size:
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21 Mar 2025, Stefan Ritt, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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> All this is kind of reasonable, as only two settings of write cache size are useful: 0 to
> disable it, and 10 Mbytes to limit semaphore locking rate to reasonable value for all event
> rate and size values practical on current computers.
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25 Mar 2025, Konstantin Olchanski, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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> > All this is kind of reasonable, as only two settings of write cache size are useful: 0 to
> > disable it, and 10 Mbytes to limit semaphore locking rate to reasonable value for all event
> > rate and size values practical on current computers.
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21 Jul 2025, Stefan Ritt, Bug Report, Default write cache size for new equipments breaks compatibility with older equipments
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> Perhaps have:
>
> set_write_cache_size("SYSTEM", 0);
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 13 Jan 2023, Denis Calvet, Suggestion, Debug printf remaining in mhttpd.cxx
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Hi everyone,
It has been a long time since my last message. While porting Midas front-end
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13 Jan 2023, Stefan Ritt, Suggestion, Debug printf remaining in mhttpd.cxx
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These debug statements were added by K.O. on June 24, 2021. He should remove it.
https://bitbucket.org/tmidas/midas/commits/21f7ba89a745cfb0b9d38c66b4297e1aa843cffd
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02 Jul 2009, Dawei Liu, Forum, Data taking hangs in the middle of run
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Hi,
We are using midas to read ADC. It sometimes hung in the middle of data taking.
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03 Jul 2009, Pierre-Andre Amaudruz, Forum, Data taking hangs in the middle of run
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Hi Dawei,
Could you give more info on your setup:
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06 Jul 2009, Dawei Liu, Forum, Data taking hangs in the middle of run
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Hi Pierr-Andre,
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21 Oct 2019, Vinzenz Bildstein, Forum, Data for key truncated
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I keep on getting messages like this:
16:25:35 [fecaen,ERROR] [odb.c:4567:db_get_data,ERROR] data for key
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23 Oct 2019, Konstantin Olchanski, Forum, Data for key truncated
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> I keep on getting messages like this:
> 16:25:35 [fecaen,ERROR] [odb.c:4567:db_get_data,ERROR] data for key
> "/DAQ/params/VX1730/custom/Board 0/Channel 0/Input range" truncated
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14 Jan 2026, Derek Fujimoto, Bug Report, DEBUG messages not showing and related
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I have an application where I want to (optionally) send my own debugging messages to the midas.log file, but am having some problems with this:
* Messages with type MT_DEBUG don't show up in midas.log or on the messages page (calling cm_msg from python)
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14 Jan 2026, Stefan Ritt, Bug Report, DEBUG messages not showing and related
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MT_DEBUG messages are there for debugging, not logging. They only go into the SYSMSG buffer and NOT to the log file. If you want anything logged, just use
MT_INFO.
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14 Jan 2026, Derek Fujimoto, Bug Report, DEBUG messages not showing and related
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Ok thanks for the quick and clear response!
Derek
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22 Apr 2010, Jimmy Ngai, Forum, Customized "Start" page
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Dear All,
After clicking the "Start" button, there is a page for the operator to change some
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14 Jan 2019, Becky Chislett, Bug Report, Custom script with new MIDAS
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I am having difficulty getting the custom scripts to work within the updated MIDAS. Before the
update I was using something like :
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18 Jan 2019, Konstantin Olchanski, Bug Report, Custom script with new MIDAS
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> I am having difficulty getting the custom scripts to work within the updated MIDAS. Before the
> update I was using something like :
>
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