Montag-27-02-2017
» Serverstatistiken für den Monat June
PageImpressions:

durchschnittl. PIs/Tag:

max. PIs/Tag
5780

262

1044


Visits*:

durchschnittl. Visits*/Tag:

max. Visits*/Tag
1537

69

102


unterschiedl. Hosts:

747



» 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


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


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



* 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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Die aktuellen Serverstatistiken für den Monat June:


PageImpressions: 5780
Ø PIs/Tag: 262
max. PIs/Tag:

1044

Visits: 1537
Ø Visits/Tag: 69
max. Visits/Tag:

102

unterschiedl. Hosts: 747


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