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DetChar (General)
takahiro.yamamoto - 18:35 Tuesday 14 March 2023 (24418) Print this report
Comment to SummaryPage trouble: process was stopped from 3/13 21:00 UTC (24411)

How about reducing the timeout period?

Current timeout is set as 12hrs. (43200s).
Default of SummaryPages (on LIGO git) is 3hrs. (10800s).
So someone intentionally(?) changed it in KAGRA.

Figure 1 shows calculation time of each process during recent 1-week.
(Log is stored only recent 1-week.)
Because amount of using data increases in the end of a day, calculation time increases with time in UTC.
According to the calculation time around 23h in UTC, it seems to be no problem reducing timeout period
though number of outliers seems to be large during the day-time in JST.

By the way, is there possibility that SummaryPages uses a lot of NDS resources?
Most of outliers can be seen around 3h-12h in UTC (=12h-21h).
It is roughly same time as commissioning activities (mainly by Ushiba-kun).
And also we sometimes face "NDS overloaded" errors on ndscope even if TestPoint channels don't use so many.
So SummaryPages and commissioning activities may compete for NDS resources.

If so, this error may be improved by preparing a dedicated NDS server for SummaryPages.

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