Google Cloud CDN Cache Hit Ratio - Confusion

[Chandan Kumar]

Hello,

I've enabled Google Cloud CDN to the backend in HTTP LB but not sure if it's working.  Cache hit ratio shows 0 as you can see below.

How do I ensure Cloud CDN cache is actually working?

[David McWherter]

+tgreer

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[Chandan]

Hello Todd,

Thanks for the response.

I looked into console again today, and found ratio is 6.3% so looks like it's working. There is no performance related problem, but I was just trying to understand how to prove that Google CDN cache is working.

I see "VIA: 1.1 Google" in the response header. Does it mean caching is working?

1. Request URL:
   https://geekflare.com/wp-content/themes/geekflare/style.css
2. Request Method:
   GET
3. Status Code:
   200 (from disk cache)
4. Remote Address:
   104.25.133.107:443
5. Referrer Policy:
   no-referrer-when-downgrade
1. Response Headers
1. access-control-allow-origin:
   *
2. cache-control:
   public, max-age=315360000
3. cf-cache-status:
   HIT
4. cf-ray:
   3696b9cdaad86f90-SIN
5. content-encoding:
   gzip
6. content-type:
   text/css
7. date:
   Sun, 04 Jun 2017 00:20:20 GMT
8. etag:
   W/"59326769-dfdf"
9. expires:
   Wed, 02 Jun 2027 00:20:20 GMT
10. last-modified:
    Sat, 03 Jun 2017 07:38:17 GMT
11. server:
    cloudflare-nginx
12. status:
    200
13. vary:
    Accept-Encoding
14. via:
    1.1 google
15. x-content-type-options:
    nosniff

On Wed, May 31, 2017 at 2:22 AM, Todd Greer <tgr...@google.com> wrote:

Hi Chandan,

For the most common issues, see this GCache troubleshooting guide. Likely problems include traffic all coming from internal IPs, and responses not having headers that indicate cacheability. Much of this internal GCache guide and the external docs are also useful. If you give me a URL that should be cached but isn't, I'll take a look. Please include an example request/response pair with full headers.

On Sun, May 28, 2017 at 11:07 AM, David McWherter <ca...@google.com> wrote:

+tgreer

On Sat, May 27, 2017 at 8:18 PM, Chandan Kumar <scorpio...@gmail.com> wrote:

Hello,

I've enabled Google Cloud CDN to the backend in HTTP LB but not sure if it's working.  Cache hit ratio shows 0 as you can see below.

How do I ensure Cloud CDN cache is actually working?

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Thanks,

Chandan 

https://chandan.io

 - Best Is Yet To Come!