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RE: Header Size? Was: Our Schedule

From: Richard Wheeldon (rwheeldo) <rwheeldo@cisco.com>
Date: Wed, 28 May 2014 15:51:36 +0000
To: Greg Wilkins <gregw@intalio.com>, HTTP Working Group <ietf-http-wg@w3.org>
Message-ID: <0566CA5E9B906D40B6737DD47DA9FB8F1AFC5EDF@xmb-rcd-x04.cisco.com>
> ‚ÄčI don't have actual statistics of length of the header.

I do :)

The following are based off yesterday's CWS traffic. ~ 6BN requests of which only 123 fall into the > 64K category. So, yes they exist but they're a tiny edge case.
Header sizes in each case are rounded down to the nearest KB.

Richard

Total Size of Request Headers (KB)	Hits	Total Bandwidth used (bytes)
0	4,872,582,729	2,328,383,321,450
1	1,020,373,150	1,413,712,005,239
2	257,251,419	635,717,697,310
3	100,069,677	351,044,064,205
4	44,559,279	202,820,971,360
5	19,501,513	108,407,535,016
6	10,030,017	66,265,639,126
7	5,958,110	45,505,452,109
8	3,442,549	29,770,417,740
9	1,947,956	18,866,794,032
10	1,167,259	12,505,049,055
11	716,798	8,413,448,445
12	493,658	6,304,415,009
13	380,169	5,245,221,153
14	290,264	4,306,207,353
15	226,623	3,590,185,566
16	182,467	3,080,199,567
17	158,994	2,847,223,916
18	154,289	2,921,099,390
19	124,088	2,476,816,871
20	106,242	2,228,673,523
21	97,869	2,154,231,469
22	78,943	1,818,378,619
23	76,933	1,850,363,872
24	64,328	1,613,928,318
25	65,263	1,703,500,953
26	53,204	1,443,038,201
27	48,453	1,364,127,888
28	41,576	1,212,854,050
29	37,563	1,134,034,148
30	28,949	903,359,201
31	20,702	667,098,744
32	15,389	513,407,094
33	9,278	317,754,854
34	6,122	216,228,441
35	5,016	182,332,930
36	6,025	224,889,071
37	3,610	138,538,389
38	3,879	153,077,676
39	4,015	162,104,070
40	2,317	96,090,026
41	2,141	90,965,098
42	2,466	107,214,503
43	1,898	84,569,085
44	1,873	85,334,787
45	1,879	87,536,079
46	1,594	75,938,436
47	1,834	89,202,662
48	3,406	169,000,837
49	1,929	97,776,397
50	1,586	82,011,745
51	1,544	81,431,356
52	1,637	87,995,729
53	1,667	91,349,565
54	1,492	83,281,926
55	1,517	86,234,890
56	1,596	92,383,611
57	1,885	111,044,218
58	1,241	74,190,694
59	618	37,621,315
60	367	22,719,508
61	400	25,195,632
62	481	30,763,860
63	385	25,011,901
64	105	6,913,055
65	1	66,763
69	1	70,658
89	16	1,463,440
Received on Wednesday, 28 May 2014 15:52:06 UTC

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