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Terrence's avatar
Terrence
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May 27, 2014

Why is this not being Cached

I have banged my head for two days now attempting to figure out what and why this isnt being cached by the F5. It appears that its a long dark road when you are attempting to figure out why things arent hapenning in regards to wam.

> GET /myCOMPANY/node/6 HTTP/1.1
> User-Agent: curl/7.35.0
> Host: t-www.COMPANY.com
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Tue, 27 May 2014 20:11:01 GMT
* Server Apache is not blacklisted
< Server: Apache
< X-Drupal-Cache: HIT
< Content-Language: en
< Link: ; rel="canonical",; rel="shortlink"
< X-Generator: Drupal 7 (http://drupal.org)
< Cache-Control: no-cache
< Last-Modified: Tue, 27 May 2014 13:37:24 +0000
< Expires: Tue, 27 May 2014 20:11:03 GMT
< Vary: Cookie,Accept-Encoding
< X-XSS-Protection: 1; mode=block
< Content-Type: text/html; charset=utf-8
< Set-Cookie: BIGipServerCOMPANY_CORPORATE_DEV.app~COMPANY_CORPORATE_DEV_pool=rd2o00000000000000000000ffff8ed6f029o80; path=/
< Accept-Ranges: none
< X-WA-Info: [V2.S10201.A5777.P45671.N13710.RN0.U2407940255].[OT/html.OG/pages].[P/0.3].[O/0.2].[EH1/0].[DH1/0].[C/P]
< Transfer-Encoding: chunked
<
{ [data not shown]
* Connection 0 to host t-www.COMPANY.com left intact

wainfodecode returns the following: 

V2: X-WA-Info Format Version
    S10201: Response was served from the origin web server, because the request was for new content.
    A5777: Application: /Common/DRUPAL-TEST.app/DRUPAL-TEST_aam
    P45671: Local-policy: /Common/Generic Policy - MyCompany
    N13710: Request Policy Node: Pages
    RN0: Response match did not supersede request match
    UCI hash: da7ae1cc
    Object type: html
    Object group: pages
    Request served from TMM: 0.2
    Request owned by TMM: 0.3
    Entity hit count (local/remote): 1/0
    Document hit count (local/remote): 1/0
    Document cacheable, but not seen enough to cache.

I am at my wits end and I have no understanding of why, or how to make this cache.

application acceleration manager

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  • Terrence's avatar
    Terrence
    Icon for Nimbostratus rankNimbostratus
    May 27, 2014

    It appears that I have found the root of my issue. And it was completely by accident. I was browsing the site and found a page that was larger than the Maximum Object size of the default profile(50000 bytes). This returned a "This page it to large to cache" in X-WA-Info. I increased the size to 80000 to see if I could get a page to cache(I also fiddled with the parent profile). And miraculously all the pages that would not cache before started caching. I verified this by setting the profile back to 50000 and sure enough the pages started not caching again.

     

    It appears to be a bug perhaps in X-WA-Info as after putting the number back to 50000 the X-WA-Info once again returned: [V2.S10201.A5777.P45671.N89193.RN0.U3665486284].[OT/html.OG/pages].[P/0.3].[O/0.3].[EH3/0].[DH3/0].[C/P] S10201: Response was served from the origin web server, because the request was for new content.

     

    Setting it back to 80000 and the pages started caching again.

     

    I am running 11.4.1 in a vcmp configuration on v5200's if that matters