Physics Forums experiencing severe slowness and database errors

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And again. Note there is a half an hour gap in posts at PF between 12:30 and 13:00 PM my time (that is, last half an hour). Earlier there were posts every few minutes, which suggests it was a problem with PF, not with my link.
 

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Borek said:
502 Bad Gateway again
I had it also.
 
Same problem here but the speed looks normal again
 
Drive-by intermittent hacker attacks perhaps, if so, how fiendishly clever on their part, let's hope that this scenario is NOT the case. Any comments ? Greg ? Admins ?

Rhody... :bugeye:
 
There was a long delay to sign in, a message at the bottom of the page said "waiting for xxxx.mathjax.org". If I get it again, I'll note what the "xxxx" is.
 
rhody said:
Drive-by intermittent hacker attacks perhaps, if so, how fiendishly clever on their part, let's hope that this scenario is NOT the case. Any comments ? Greg ? Admins ?

Rhody... :bugeye:

nginx simply crashed. no attack

lisab said:
There was a long delay to sign in, a message at the bottom of the page said "waiting for xxxx.mathjax.org". If I get it again, I'll note what the "xxxx" is.

cdn. not related
 
Greg Bernhardt said:
nginx simply crashed. no attack



cdn. not related
Things have been working very well on this end. But thanks for this info as we are all a little...a lot addicted to PF. :approve:
 
lisab said:
There was a long delay to sign in, a message at the bottom of the page said "waiting for xxxx.mathjax.org". If I get it again, I'll note what the "xxxx" is.

This is our new LaTeX engine, sometimes it has its own quirks.

I see this message several times a day on average. In my case it is most likely Opera related
 
Borek said:
This is our new LaTeX engine, sometimes it has its own quirks.

I see this message several times a day on average. In my case it is most likely Opera related

I'm using Chrome.
 
lisab said:
I'm using Chrome.
I'm using the Windows 7 operating system and added the http://www.stixfonts.org/" installation instructions.
 
Last edited by a moderator:
lisab said:
I'm using Chrome.

MathJax is on different servers that PF is, so it may happen you can connect to PF without problems, while MathJax can't be reached. This part is not browser dependent, so it won't be surprising to see it on any computer.

Problem with Opera seems to be that for some reason it tries to contact MathJax servers each time PF pages are loading, instead of using cached version of the files. That means much more traffic and higher probability of problems. As far as I can tell Chrome uses cached version much more efficiently on my machine, but I didn't test it well enough to be sure - could be I was just lucky. For sure when Opera fails to load PF pages, I can switch to Chrome and browse the site without problems.
 
Bad Gateway after submitting a post, lost it, about 6:30 AM EDT.

Rhody...
 
I have the problem about once a day each day, around 11 GMT. It never lasts long and - as far I can tell - it can't be assigned to a specific time, more like +/- 1 hour of some point.

As it happens also in the morning - when AFAIK maintenance scripts are working, I wonder if it is not some other maintenance script?
 
Yes for me, every morning at 8:30 am exactly, PF is down for a few minutes. Maybe one year, I'll learn not to try to open PF exactly at that time.