Here are some service times for the new Wikipedia server under actual
user load, and a bit of analysis: see futher down the page for more details.
Sample set was the subset of logfile entries up to my sampling time,
with timestamps starting 20020721
Here is a summary of all pages served in less than 30 seconds.
Values on a line are, from left to right:
* service time bin (bin n is all pages serviced in n <= time < n+1 seconds)
* number of pages served in that time bin
* cumulative fraction of pages serviced in that time bin or less
0 12734 0.830171458374
1 1295 0.914596779451
2 493 0.946737075429
3 259 0.963622139644
4 116 0.971184562227
5 80 0.976400026077
6 59 0.980246430667
7 46 0.983245322381
8 24 0.984809961536
9 15 0.985787861008
10 15 0.98676576048
11 27 0.988525979529
12 17 0.989634265597
13 15 0.990612165069
14 15 0.991590064541
15 11 0.992307190821
16 7 0.992763543908
17 7 0.993219896995
18 7 0.993676250081
19 5 0.994002216572
20 7 0.994458569659
21 7 0.994914922746
22 2 0.995045309342
23 2 0.995175695938
24 3 0.995371275833
25 2 0.995501662429
26 3 0.995697242323
27 2 0.99582762892
28 3 0.996023208814
29 3 0.996218788709
Here are the outlier pages that took 30 seconds or more to service, with
their timestamps.
20020721000038 194.499 /wiki/Astronomer
20020721000439 67.529 /
20020721000905 210.965 /
20020721000946 83.656 /w/wiki.phtml?title=Talk:Palestine&diff=0&oldid=0
20020721001035 512.128 /wiki/Nicolaus_Copernicus
20020721001354 199.017 /wiki/Astronomy_and_astrophysics
20020721001715 70.412 /wiki/Galileo_Galilei
20020721001745 31.105 /w/wiki.phtml?search= football world cup 2002
20020721002017 122.17 /wiki/Astronomer
20020721002314 134.53 /wiki/Hipparchus
20020721002316 65.866 /wiki/Astronomers_and_Astrophysicists
20020721002354 171.431 /wiki/Astronomer
20020721002729 36.432 /wiki/Johannes_Kepler
20020721002825 110.615 /wiki/Astronomer
20020721003134 68.176 /wiki/Astronomer
20020721003725 35.912 /wiki/Astronomers_and_Astrophysicists
20020721003758 159.654 /wiki/Astronomer
20020721004535 142.506 /wiki/Sir_Francis_Bacon
20020721010559 193.656 /wiki/Balance
20020721010559 233.676 /wiki/Measuring instrument
20020721010919 67.078
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=500
20020721013508 32.212
/w/wiki.phtml?title=Special:Recentchanges&days=14&limit=1000
20020721013817 49.659
/w/wiki.phtml?title=Special:Recentchanges&days=14&limit=1000
20020721015410 57.194
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=2000
20020721015558 43.563
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=2000
20020721015705 43.681
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=2000
20020721015828 42.666
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=2000
20020721020143 56.721
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=2000
20020721020456 93.871 /wiki/2001 U.S. Attack on Afghanistan
20020721021425 52.227 /wiki/Osama_bin_Laden
20020721021601 30.76 /wiki/Particle_physics&action=print
20020721022123 32.322 /wiki/Taliban
20020721023913 43.72
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=500
20020721024042 31.297 /wiki/September_11%2C_2001_Terrorist_Attack
20020721024151 35.013 /
20020721024352 31.545 /wiki/Special:Recentchanges
20020721024626 94.781 /wiki/Special:Recentchanges
20020721024637 31.751 /wiki/Special:Recentchanges
20020721025053 30.813 /wiki/September_11%2C_2001_Terrorist_Attack
20020721030026 30.034 /wiki/Cantor_Fitzgerald
20020721030106 60.296 /wiki/2001 U.S. Attack on Afghanistan
20020721031414 42.459 /wiki/Special:Wantedpages
20020721031427 55.526 /wiki/Special:Wantedpages
20020721031428 37.361 /wiki/Computing_timeline
20020721032613 32.112 /wiki/Earth_impacts
20020721032628 30.052 /wiki/20th_century
20020721033849 39.932
/w/wiki.phtml?title=Special:Recentchanges&days=3&limit=1500
20020721035505 146.219 /
20020721035824 31.713 /wiki/Special:Recentchanges
20020721035853 52.951 /wiki/Special:Recentchanges
20020721040232 224.979 /wiki/British_Open
20020721040525 54.24 /
20020721043452 104.493 /wiki/Special:Recentchanges
20020721043455 95.882 /wiki/India
20020721050334 81.403 /wiki/Philosophy
20020721052726 32.934
/w/wiki.phtml?title=Special:Wantedpages&limit=500&offset=100
20020721053950 45.24 /wiki/Free_On-line_Dictionary_of_Computing/C_-_D
20020721054101 37.168 /wiki/Free_On-line_Dictionary_of_Computing/C_-_D
Concentrating on just one page that appears more than once in the
outliers, and looking at all accesses in the sample whether outlines or
not, it is interesting to look at the variation in service times for
this page.
20020721000038 0194.499 /wiki/Astronomer
20020721001207 0018.859 /wiki/Astronomer
20020721002017 0122.170 /wiki/Astronomer
20020721002354 0171.431 /wiki/Astronomer
20020721002825 0110.615 /wiki/Astronomer
20020721003134 0068.176 /wiki/Astronomer
20020721003758 0159.654 /wiki/Astronomer
**Most** accesses to this particular page seem to have taken **over 1
minute**, and yet there appears to be nothing pathological about the
contents of the page. This is interesting!
Neil
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