[WikiEN-l] Fwd: [Wikitech-l] Downtime this morning

[stevertigo]

Carcharoth <carcharothwp at googlemail.com> wrote:
> nagios?
> ganglia?
> 4-CPU apache?
> scap?
> swap?
> memcached node?
> <eyes glazing over>
> Is it fixed now? Oh, good. :-)

Off the top of my head...

"Nagios" is ostensibly the report server and caching manager and
"ganglia" IIRC is a page caching manager. "Caching" basically just
means keeping wiki pages in RAM so that things get fetched quickly -
most people are not logged in so they get the same HTML and reuse the
same CSS.

The main concept was that the error not only caused caching servers
that were supposed to keep pages in RAM had to dump these pages into
swap memory, but it affected a main caching node through which other
nodes... do stuff... apparently. "Memcached" is the name of the
caching software, or rather one of them, and the first one implemented
here. IIRC it was first developed for /. (?), and kind of kept WP
barely alive through the great traffic growth spurts of 04 and 05.

I looked up "scap" and still dunno what it is.

Again, that's just off the cuff. Don't take anything seriously.

-Stevertigo