[Zope-dev] Performance

[Chris McDonough]

Bill, neat analysis.

Chad, you'll probably be concerned with peak performance.  I don't have
any replicable stats on Zope performance, but we run Zope.org on a a
single PIII-500 with an IDE hard disk and 256MB of RAM.  It receives on
average about 2 million hits a month, which translates into about 1
million page views a month (we have only three widely-viewed graphics on
the site).

We have stats that show averaged over a one-hour period, it can handle
at least 30 page views/sec.  Not burning-rubber, but respectable.  Note
that this is only indicative of what it *has* handled without
significant impact, not what it *can* handle.

Peak speed will obviously also be influenced by hardware decisions.

<plug>
We also sell ZEO (Zope Enterprise Option) which is a combination of
service and software that allows you to spread load across multiple Zope
instances.  You may need it, I'm not sure.  See
http://www.digicool.com/Solutions/ZEOFactSheet.pdf for more info or
email Paul Everitt (mailto:paul@digicool.com)
</plug>

Bill Anderson wrote:
> 
> > Chad Dyer wrote:
> >
> > We are considering using ZOPE to manage our consumer web sites. In
> > aggregate they currently do
> > 500,000 page views a day. We need them to scale to 2 million page
> > views.
> 
> On what hardware? OS?
> A mix of static and dynamic, or pure Zope?
> What level of graphical content?
> 
> These are questions you need to have before anyone can give you an
> answer.
> 
> That said, 2M views per day is only 2.31 per second. if each page
> constitutes  3-4 graphics, that is about 4-5 (call it 5) 'hits' per
> second, so you wind up with about 10 'hits' per second. Running ab on a
> Zope/Roxen server on a dual Celeron-450 w/256MB RAM, SCSI-RAID machine I
> can pull 1-2 times that when connecting to an SQL database, and
> significantly more for other types of pages.
> 
> Here are the results of one run, to a 'nearly static' Zope page:
> ==========================
> Server Software:        Roxen
> Server Hostname:        www.libc.org
> Server Port:            80
> Document Path:          /index_html
> Document Length:        2899 bytes
> Concurrency Level:      10
> Time taken for tests:   38.665 seconds
> Complete requests:      1000
> Failed requests:        0
> Total transferred:      3030027 bytes
> HTML transferred:       2901899 bytes
> Requests per second:    25.86
> Transfer rate:          78.37 kb/s received
> Connnection Times (ms)
>               min   avg   max
> Connect:        0     0     2
> Processing:   212   384   627
> Total:        212   384   629
> =====================
> (Note that this page has 2 graphics.)
> 
> A run against the PTK 'recent news' method (the page itsself hase 5
> graphics, 2 of which are retreived from calls to the adbanner product
> shows, 4 news items (ZODB stored), shows a rate of ~7 Requests per
> second.
> 
> Now, AIUI, ab (apachebench) is counting each retreival of the specified
> url as a 'Request'. If so, you can take the first results and compare
> them to the 2.31 views/second from the 2M views/day. At that rate, the
> PTK request would be serving up roughly 6M views/day.
> 
> Mind you, this machine has many other things running on it at the time
> (like several other Zope instances for example, as well as ab), so YMMV.
> 
> Maybe next week I'll post ab results against an HP N-Class ....
> 
> (btw, please don't send html to the list)
> 
> --
> In flying I have learned that carelessness and overconfidence are
> usually far more dangerous than deliberately accepted risks.
>           -- Wilbur Wright in a letter to his father, September 1900
> 
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-- 
Chris McDonough
Digital Creations, Inc.
Zope - http://www.zope.org