Always a SessionClose after a Cache Hit

[Bruce Rudolph]

I verified this happens also with Varnish 2.1.5.

I expect to see a lot of requests on a persistent connection. However I am only getting one request per connection. The performance to the app driving the requests "tanks" because a new session needs to be opened.

Hopefully someone can shed some light on this problem.

Bruce

On Apr 18, 2013, at 4:21 PM, Bruce Rudolph wrote:

> Running Varnish 3.0.3 on CentOS 5.8.
> 
> I am wondering why there is a SessionClose after a cache hit and delivery. The example below shows the varnishlog output of the request/response. There is a keep-alive header in the request and response. Normally the client calling my app would still keep the session open and is supposed to send more requests.
> 
> Any suggestions?
> 
> 10773 SessionOpen  c 204.13.194.63 53590 :80
> 10773 ReqStart     c 204.13.194.63 53590 134881832
> 10773 RxRequest    c GET
> 10773 RxURL        c /ourapp?url=http%3A%2F%2Fjsonline.com
> 10773 RxProtocol   c HTTP/1.1
> 10773 RxHeader     c Host: 8.12.230.136
> 10773 RxHeader     c Connection: keep-alive
> 10773 VCL_call     c recv lookup
> 10773 VCL_call     c hash
> 10773 Hash         c jsonline.com
> 10773 VCL_return   c hash
> 10773 Hit          c 134858969
> 10773 VCL_call     c hit deliver
> 10773 VCL_call     c deliver deliver
> 10773 TxProtocol   c HTTP/1.1
> 10773 TxStatus     c 200
> 10773 TxResponse   c OK
> 10773 TxHeader     c Cache-Control: s-maxage=86400
> 10773 TxHeader     c Content-Type: text/plain
> 10773 TxHeader     c Content-Length: 13
> 10773 TxHeader     c Accept-Ranges: bytes
> 10773 TxHeader     c Date: Thu, 18 Apr 2013 19:55:17 GMT
> 10773 TxHeader     c X-Varnish: 134881832 134858969
> 10773 TxHeader     c Age: 10
> 10773 TxHeader     c Via: 1.1 varnish
> 10773 TxHeader     c Connection: keep-alive
> 10773 Length       c 13
> 10773 ReqEnd       c 134881832 1366314917.734391928 1366314917.734510899 1.976155043 0.000053167 0.000065804
> 10773 SessionClose c EOF
> 
> 
> Bruce

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