[Catalog-sig] PyPI outage

Krystal Racine KrystalRacine at yahoo.com
Fri Aug 10 22:01:50 CEST 2007

Have you thought about testing the load with a hosted web service? Some offer
by GEO location

"Martin v. Löwis" wrote:
>> Nice one.  I tried clicking around on the wiki as quickly as I could,
>> and it didn't seem to block me :)
>> It feels more responsive, compared to when I was using it yesterday.
>> Saving pages  seems to be especially faster than before at the moment.
> That might depend on the time of the day - load is low at the moment.
> So far, nobody got locked out but myself, in testing.
>> Do you consider the cases where multiple people use one ip?  Like at
>> conferences, companies, and from large isps that use proxies (eg AOL)?
>>  It sounds like you have.
> Not really - it's only that the formula allows for quite many
> simultaneous access, as long as they don't run for a long period of
> time. E.g if "normal" people read 20 pages per hour (which they
> don't sustain over several hours), we can have 90 such users
> simultaneously.
> The busy hour is 19:00..20:00 GMT, the wiki gets roughly 3600
> requests in that hour total (on average in July) -
> so allowing one request every two seconds from a bot is fairly
> permissive.
> At a conference, if people are told simultaneously to look at the
> same page, we can only accommodate 30 people doing so. The next
> 30 people will have to wait 15s. So if the entire conference of
> 200 people access the page within 30s, some will see the overload
> page. If this turns out to be a problem, the limit of 30 can be
> raised (without raising the allowed request rate); if it's raised
> to, say, 400, then we can take a spike of 400 accesses, which
> then takes 13 minutes to decay.
> Regards,
> Martin
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> Catalog-SIG at python.org
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