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| » Serverstatistiken für den Monat June |
PageImpressions:
durchschnittl. PIs/Tag:
max. PIs/Tag
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5780
262
1044
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Visits*:
durchschnittl. Visits*/Tag:
max. Visits*/Tag
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1537
69
102
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unterschiedl. Hosts:
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747
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| » Serverstatistiken im Monatsvergleich |
PageImpressions:
| August 2001 |  1888 | | September 2001 | 1635 | | October 2001 | 2082 | | November 2001 | 1563 | | December 2001 | 1567 | | January 2002 | 1646 | | February 2002 | 1242 | | March 2002 | 1013 | | April 2002 | 1058 | | May 2002 | 1323 | | June 2002 | 951 | | July 2002 | 1068 | | August 2002 | 1169 | | September 2002 | 1024 | | October 2002 | 1655 | | November 2002 | 1641 | | December 2002 | 1137 | | January 2003 | 1721 | | February 2003 | 1338 | | March 2003 | 1582 | | April 2003 | 1732 | | May 2003 | 1373 | | June 2003 | 1015 | | July 2003 | 1536 | | August 2003 | 1455 | | September 2003 | 1483 | | October 2003 | 1308 | | November 2003 | 1831 | | December 2003 | 1411 | | January 2004 | 1540 | | February 2004 | 1226 | | March 2004 | 1721 | | April 2004 | 1435 | | May 2004 | 1236 | | June 2004 | 1337 | | July 2004 | 2348 | | August 2004 | 1739 | | September 2004 | 1980 | | October 2004 | 1920 | | November 2004 | 1865 | | December 2004 | 2479 | | January 2005 | 4030 | | February 2005 | 3187 | | March 2005 | 5190 | | April 2005 | 5904 | | May 2005 | 6445 | | June 2005 | 5459 | | July 2005 | 5646 | | August 2005 | 6115 | | September 2005 | 5060 | | October 2005 | 6784 | | November 2005 | 5830 | | December 2005 | 5622 | | January 2006 | 6318 | | February 2006 | 6208 | | March 2006 | 9114 | | April 2006 | 6527 | | May 2006 | 7070 | | June 2006 | 5780 |
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Visits*:
| August 2001 | 289 | | September 2001 | 315 | | October 2001 | 513 | | November 2001 | 440 | | December 2001 | 378 | | January 2002 | 462 | | February 2002 | 460 | | March 2002 | 410 | | April 2002 | 466 | | May 2002 | 438 | | June 2002 | 373 | | July 2002 | 533 | | August 2002 | 481 | | September 2002 | 458 | | October 2002 | 711 | | November 2002 | 728 | | December 2002 | 548 | | January 2003 | 651 | | February 2003 | 565 | | March 2003 | 754 | | April 2003 | 842 | | May 2003 | 714 | | June 2003 | 461 | | July 2003 | 690 | | August 2003 | 677 | | September 2003 | 742 | | October 2003 | 872 | | November 2003 | 878 | | December 2003 | 851 | | January 2004 | 698 | | February 2004 | 568 | | March 2004 | 741 | | April 2004 | 649 | | May 2004 | 539 | | June 2004 | 647 | | July 2004 | 986 | | August 2004 | 664 | | September 2004 | 801 | | October 2004 | 884 | | November 2004 | 762 | | December 2004 | 720 | | January 2005 | 1527 | | February 2005 | 1217 | | March 2005 | 2431 | | April 2005 | 2756 | | May 2005 | 3380 | | June 2005 | 2307 | | July 2005 | 2652 | | August 2005 | 1976 | | September 2005 | 1739 | | October 2005 | 1861 | | November 2005 | 1652 | | December 2005 | 1855 | | January 2006 | 1852 | | February 2006 | 1817 | | March 2006 | 3741 | | April 2006 | 2937 | | May 2006 | 2171 | | June 2006 | 1537 |
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unterschiedl. Hosts:
| August 2001 | 183 | | September 2001 | 131 | | October 2001 | 369 | | November 2001 | 285 | | December 2001 | 201 | | January 2002 | 381 | | February 2002 | 298 | | March 2002 | 264 | | April 2002 | 287 | | May 2002 | 348 | | June 2002 | 207 | | July 2002 | 369 | | August 2002 | 277 | | September 2002 | 351 | | October 2002 | 470 | | November 2002 | 442 | | December 2002 | 446 | | January 2003 | 486 | | February 2003 | 385 | | March 2003 | 533 | | April 2003 | 610 | | May 2003 | 483 | | June 2003 | 349 | | July 2003 | 407 | | August 2003 | 403 | | September 2003 | 470 | | October 2003 | 520 | | November 2003 | 437 | | December 2003 | 476 | | January 2004 | 451 | | February 2004 | 459 | | March 2004 | 532 | | April 2004 | 452 | | May 2004 | 378 | | June 2004 | 447 | | July 2004 | 552 | | August 2004 | 354 | | September 2004 | 455 | | October 2004 | 462 | | November 2004 | 472 | | December 2004 | 480 | | January 2005 | 807 | | February 2005 | 644 | | March 2005 | 974 | | April 2005 | 1065 | | May 2005 | 903 | | June 2005 | 773 | | July 2005 | 706 | | August 2005 | 799 | | September 2005 | 739 | | October 2005 | 732 | | November 2005 | 718 | | December 2005 | 819 | | January 2006 | 685 | | February 2006 | 742 | | March 2006 | 1164 | | April 2006 | 1358 | | May 2006 | 837 | | June 2006 | 747 |
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* Das von meinem Provider verwendete Serverstatistik-Modul
"Webalizer" führt
in seiner Ergebnisdatei unter anderem auch die Anzahl der "Visits" auf. Diese Zahlen
sind jedoch sehr ungenau und beruhen lediglich auf Schätzungen und Annahmen.
Anders als bei "PageImpressions" ist es
definitiv nicht möglich, die Anzahl der "Visits" exakt zu berechnen, weil das
Log-File des Webservers diese Informationen einfach nicht hergibt.
Die folgenden Zitate aus dem Manual von "Analog"
erklären, warum dies so ist."Analog"
ist ebenfalls ein Programm zur Erstellung von Serverstatistiken, es wurde
von Dr. Stephen Turner
am Statistischen Labor der Universität Cambridge entwickelt:
"You can't tell how many visitors you've had. You can guess by looking at the number of distinct hosts that have requested things from you. Indeed this is
what many programs mean when they report "visitors". But this is not always a good estimate for three reasons. First, if users get your pages from a local
cache server, you will never know about it. Secondly, sometimes many users appear to connect from the same host: either users from the same company or
ISP, or users using the same cache server. Finally, sometimes one user appears to connect from many different hosts. AOL now allocates users a different
hostname for every request. So if your home page has 10 graphics on, and an AOL user visits it, most programs will count that as 11 different
visitors!
You can't tell how many visits you've had. Many programs, under pressure from advertisers' organisations, define a "visit" (or "session") as a sequence of
requests from the same host until there is a half-hour gap. This is an unsound method for several reasons. First, it assumes that each host corresponds to a
separate person and vice versa. This is simply not true in the real world, as discussed in the last paragraph. Secondly, it assumes that there is never a half-hour
gap in a genuine visit. This is also untrue. I quite often follow a link out of a site, then step back in my browser and continue with the first site from where I left
off. Should it really matter whether I do this 29 or 31 minutes later? Finally, to make the computation tractable, such programs also need to assume that your
logfile is in chronological order: it isn't always, and analog will produce the same results however you jumble the lines up.
...
Defenders of counting visits etc. claim that these are just small approximations. I disagree. For example, almost everyone is now accessing the web through a cache.
If the proportion of requests retrieved from the cache is 50% (a not unrealistic figure) then half of the users' requests aren't being seen by the servers.
Other defenders of these methods claim that they're still useful because they measure something which you can use to compare sites. But this assumes that the
approximations involved are comparable for different sites, and there's no reason to suppose that this is true. Pirolli & Pitkow's results show that the figures you get
depend very much on how you count them, as well as on your server configuration. And even once you've agreed on methodology, different users on different sites
have different patterns of behaviour, which affect the approximations in different ways: for example, Pirolli & Pitkow found different characteristics of weekday and
weekend users at their site.
I've presented a somewhat negative view here, emphasising what you can't find out. Web statistics are still informative: it's just important not to slip from "this page
has received 30,000 requests" to "30,000 people have read this page." In some sense these problems are not really new to the web -- they are present just as much
in print media too. For example, you only know how many magazines you've sold, not how many people have read them. In print media we have learnt to live with
these issues, using the data which are available, and it would be better if we did on the web too, rather than making up spurious numbers."
»Links:
http://www.analog.cx/ - Analog Homepage
http://www.analog.cx/docs/map.html - Analog Manual
http://www.analog.cx/docs/webworks.html - zitierte Seite
http://www.statslab.cam.ac.uk/~sret1/ - Homepage von Dr. Stephen Turner
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