http-compression in low performance

SSH again by using root id, and here is the outputs:

 

 

[root@f5:Active] config tmsh show ltm profile

 

 

-------------------------------------------------------------

 

Ltm::HTTP Compression Profile: wan-optimized-compression

 

-------------------------------------------------------------

 

Content Type Compression (bytes) Pre-Compress Post-Compress

 

HTML 11.4K 5.9K

 

CSS 0 0

 

JavaScript 105.4K 41.5K

 

XML 0 0

 

SGML 0 0

 

Plain 0 0

 

Octet Stream 0 0

 

Images 0 0

 

Video Files 0 0

 

Audio Files 0 0

 

Other 0 0

 

Total 116.8K 47.5K

 

NULL-Compress 0 0

 

Compression Ratio (%) 59.310

 

 

[root@f5:Active] config tmsh list ltm profile

 

ltm profile http-compression wan-optimized-compression {

 

allow-http-10 enabled

 

buffer-size 131072

 

defaults-from httpcompression

 

gzip-memory-level 16k

 

gzip-window-size 64k

 

vary-header enabled

 

}

 

[root@f5:Active] config

 

OK, sorry, can you confirm that is the profile assigned to the VS? Also, can you post the httpcompression profile settings too please?

It is confirmed the profile has been applied in VS. I can see this in VS configuration > HTTP Compress Profile.

 

What command I can list the configuration of httpcompression profile? It remains system default. I have changed nothing.

 

 

Thanks

 

OK, in that case can I suggest you either;

 

 

1) Use a tool like HTTPWatch, LiveHTTPHeaders or whatever at the client and check what HTTP header Content-Types you see. Perhaps the default list isn't matching.

 

2) Do a tcpdump on the F5 and look for the same in HTTP responses.

I need tol learn how to do tcpdump on the F5 and update you later.

 

 

Here is the result from httpfox. The content type is correct.

 

 

00:00:20.6114.125550279792GET200text/htmlhttp://beta4.pushauction.com/Listing/ProfileEdit.aspx?Key=78b8dc6a-f5fa-4c48-a77b-677ec3f61d11

 

RESPONSE:

 

(Status-Line)HTTP/1.1 200 OK

 

Cache-Controlprivate

 

Content-Typetext/html; charset=utf-8

 

ServerMicrosoft-IIS/7.5

 

X-AspNet-Version4.0.30319

 

X-Powered-ByASP.NET

 

DateMon, 13 May 2013 18:22:03 GMT

 

Content-Length336093

 

 

OK, does the request contain the correct Accept-Encoding header?

Hi Steve

 

 

The request and response captured in F5 via tcpdump are exactly the same as shown in HttpFox at client browser.

 

Here is an example of request header, all include Accept_Encoding tag

 

Host: 4.pushauction.com

 

Connection: keep-alive

 

User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.79 Safari/535.11 QIHU THEWORLD

 

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

 

Referer: http://4.pushauction.com/Listing/Listing.aspx?parentID=103&page=10&btn=hrefListOnline

 

Accept-Encoding: gzip,deflate,sdch

 

Accept-Language: zh-CN,zh;q=0.8

 

Accept-Charset: GBK,utf-8;q=0.7,*;q=0.3

 

Cookie: __utma=131059338.1972362686.1355392282.1355392282.1355392282.1; __utmz=131059338.1355392282.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); ASP.NET_SessionId=box1anmvqyav31sfstdpy2tc; Lang=en-us; cateid=; folderkey=

 

 

And only javascript / css got compressed in response, which include vary tag:

 

16:12:18.828781 IP (tos 0x0, ttl 255, id 49326, offset 0, flags [DF], proto: TCP (6), length: 40) 192.168.0.90.http > 112.90.90.17.ias-admind: ., cksum 0x96ed (correct), 1:1(0) ack 682 win 65535

 

....E..(..@.../....ZpZZ..P.](_.S....P.........

 

16:12:18.828781 IP (tos 0x0, ttl 255, id 49327, offset 0, flags [DF], proto: TCP (6), length: 1480) 192.168.0.90.http > 112.90.90.17.ias-admind: ., cksum 0x3e3b (correct), 1:1441(1440) ack 682 win 65535

 

....E.....@...*....ZpZZ..P.](_.S....P...>;..HTTP/1.1 200 OK

 

Date: Tue, 14 May 2013 08:12:18 GMT

 

Connection: Keep-Alive

 

Content-Type: text/css

 

Last-Modified: Wed, 09 Jan 2013 11:10:36 GMT

 

Accept-Ranges: bytes

 

ETag: "WA827ca453e86248d3"

 

Server: Microsoft-IIS/7.5

 

X-Powered-By: ASP.NET

 

Expires: Thu, 16 May 2013 04:51:04 GMT

 

Cache-Control: public, max-age=172800, s-maxage=14400

 

Age: 11749

 

Content-Length: 8852

 

X-WA-Info: [S10101.C100018.A12236.RA0.U1196752467].[OT/all.OG/includes]

 

Vary: Accept-Encoding

 

 

F5 just not to compress plain text like this:

 

Cache-Control: private

 

Content-Type: text/xml; charset=utf-8

 

Server: Microsoft-IIS/7.5

 

X-AspNet-Version: 4.0.30319

 

X-Powered-By: ASP.NET

 

Date: Tue, 14 May 2013 08:06:57 GMT

 

Content-Length: 11877

 

X-WA-Info: [S10203.C100018.A12164.RA0.U0].[OT/xml.OG/pages]

 

 

More samples:

 

Cache-Control: private

 

Content-Type: text/html; charset=utf-8

 

Server: Microsoft-IIS/7.5

 

X-AspNet-Version: 4.0.30319

 

X-Powered-By: ASP.NET

 

Date: Tue, 14 May 2013 08:06:59 GMT

 

Content-Length: 7352

 

X-WA-Info: [S10203.C100018.A12164.RA0.U0].[OT/html.OG/pages]

 

 

Everything settings in F5 is so straight forward. However, I just cannot make F5 compress these plain text!

 

 

Thanks!

 

 

Larry

 

 

 

 

 

 

 

OK, strange. Could you try a few things please;

 

 

1) Add the following to the Content Include List of the httpcompression profile: text/*

 

2) Change the preferred method to Deflate

 

3) Change the compression level to 6

 

4) Disable Vary Header insertion