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Great Western Coffee Shop > Sideshoots - associated subjects > News, Help and Assistance > A gremlin in the coffee machine last night
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Author Topic: A gremlin in the coffee machine last night  (Read 3087 times)
grahame
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« on: October 10, 2023, 07:17:00 »
Some unusual behaviour late yesterday evening within our database engine and we had a handful of outages no more than a few minutes each; I paused the service of Coffee a couple of times while I investigated and took additional off-site backups.  Problems cleared in the early hours, but I have no definitive answer to what triggered them - just an educated guess.  Issues did NOT get to the point of formally shutting for maintenance or flagging ongoing issues, but please bookmark http://status.passenger.chat in case we ever hit something more serious.

Standard advice (abundance of caution) - if you compose a long or difficult post, please keep a local copy just in case - our systems are not strong to a safety-critical standard and should the server crash or have an accident, restoration may miss some recent activity.
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grahame
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« Reply #1 on: October 15, 2023, 22:57:50 »
Quote from: grahame on October 10, 2023, 07:17:00
Some unusual behaviour late yesterday evening within our database engine and we had a handful of outages no more than a few minutes each; I paused the service of Coffee a couple of times while I investigated and took additional off-site backups.  Problems cleared in the early hours, but I have no definitive answer to what triggered them ....

Triggered again and a Denial of Service attack caught in the act today.  Gauges went off the scale but the server carried on running and because it was caught in the act I could see what was happening, block (at midday)  and see that the block worked ...

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grahame
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« Reply #2 on: February 11, 2025, 22:16:32 »
This thread came up on my "most recent likes" ...

I was half wondering whether to post this server load (on our worker machine) from today



The spike was NOT the Coffee Shop - it was the old "Save the Train" website still hosted on the same machine which rose from under 4 accesses every minute to over 6,000 every minute for a while, all from (!) Iran.   Didn't the class 141s go out there?
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Chris from Nailsea
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« Reply #3 on: February 12, 2025, 15:09:13 »
Quote from: grahame on February 11, 2025, 22:16:32
This thread came up on my "most recent likes" ...

That was me.  Grin
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William Huskisson MP▸ (Member of Parliament) was the first person to be killed by a train while crossing the tracks, in 1830.  Many more have died in the same way since then.  Don't take a chance: stop, look, listen.

"Level crossings are safe, unless they are used in an unsafe manner."  Discuss.
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