I've set up apache and Varnish, no particular configuration involved (apache on 8080, varnish serving pages at port 80). I also dropped cookies in Varnish to ensure maximum caching of Wordpress sites.
The website works, it loads etc.; but it seems that Varnish doesn't cache anything. When I open Varnishstat, I see always Hitrate ratio: 0; and lots of "inf backend_busy" "inf backend_reuse" etc.; and no accepted_connections. Here's a sample:
0+00:00:00
Hitrate ratio: 0 0 0
Hitrate avg: 0.0000 0.0000 0.0000
146 0.00 inf backend_busy - Backend conn. too many
164 0.00 inf backend_reuse - Backend conn. reuses
16 0.00 inf backend_toolate - Backend conn. was closed
101 0.00 inf backend_recycle - Backend conn. recycles
47 0.00 inf backend_retry - Backend conn. retry
111 0.00 inf fetch_head - Fetch head
How come?
UPDATE: a Varnishlog:
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1394712509 1.0
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1394712512 1.0
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1394712515 1.0
13 BackendClose - default
13 BackendOpen b default 127.0.0.1 38776 127.0.0.1 8080
13 BackendXID b 1420058564
13 TxRequest b GET
13 TxURL b /
13 TxProtocol b HTTP/1.1
13 TxHeader b Host: www.test-mystreaming.it
13 TxHeader b Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
13 TxHeader b User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
13 TxHeader b Accept-Language: en-US,en;q=0.8,it-IT;q=0.6,it;q=0.4
13 TxHeader b X-Forwarded-For: 2.229.61.20
13 TxHeader b X-Varnish: 1420058564
13 TxHeader b Accept-Encoding: gzip
13 RxProtocol b HTTP/1.1
13 RxStatus b 200
13 RxResponse b OK
13 RxHeader b Date: Thu, 13 Mar 2014 12:08:37 GMT
13 RxHeader b Server: Apache/2.2.22 (Ubuntu)
13 RxHeader b X-Powered-By: PHP/5.3.10-1ubuntu3.10
13 RxHeader b X-Pingback: http://www.test-mystreaming.it/xmlrpc.php
13 RxHeader b Vary: Accept-Encoding
13 RxHeader b Content-Encoding: gzip
13 RxHeader b Content-Length: 7682
13 RxHeader b Content-Type: text/html; charset=UTF-8
13 Fetch_Body b 4(length) cls 0 mklen 1
13 Length b 7682
13 BackendReuse b default
11 SessionOpen c 2.229.61.20 56012 :80
11 ReqStart c 2.229.61.20 56012 1420058564
11 RxRequest c GET
11 RxURL c /
11 RxProtocol c HTTP/1.1
11 RxHeader c Host: www.test-mystreaming.it
11 RxHeader c Connection: keep-alive
11 RxHeader c Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
11 RxHeader c User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36
11 RxHeader c Accept-Encoding: gzip,deflate,sdch
11 RxHeader c Accept-Language: en-US,en;q=0.8,it-IT;q=0.6,it;q=0.4
11 RxHeader c Cookie: wp-settings-1=m5%3Do%26m4%3Do%26hidetb%3D1%26m9%3Do%26m1%3Do%26imgsize%3Dfull%26editor%3Dhtml%26libraryContent%3Dbrowse; wp-settings-time-1=1394014590; _xyz_lbx_until=1; _xyz_lbx_pc=1; __utma=257699214.1231191244.1394014450.1394039099.1394709725.5
11 VCL_call c recv lookup
11 VCL_call c hash
11 Hash c /
11 Hash c www.test-mystreaming.it
11 VCL_return c hash
11 VCL_call c miss fetch
11 Backend c 13 default default
11 TTL c 1420058564 RFC 120 -1 -1 1394712518 0 1394712517 0 0
11 VCL_call c fetch deliver
11 ObjProtocol c HTTP/1.1
11 ObjResponse c OK
11 ObjHeader c Date: Thu, 13 Mar 2014 12:08:37 GMT
11 ObjHeader c Server: Apache/2.2.22 (Ubuntu)
11 ObjHeader c X-Powered-By: PHP/5.3.10-1ubuntu3.10
11 ObjHeader c X-Pingback: http://www.test-mystreaming.it/xmlrpc.php
11 ObjHeader c Vary: Accept-Encoding
11 ObjHeader c Content-Encoding: gzip
11 ObjHeader c Content-Type: text/html; charset=UTF-8
11 Gzip c u F - 7682 33861 80 80 61389
11 VCL_call c deliver deliver
11 TxProtocol c HTTP/1.1
11 TxStatus c 200
11 TxResponse c OK
11 TxHeader c Server: Apache/2.2.22 (Ubuntu)
11 TxHeader c X-Powered-By: PHP/5.3.10-1ubuntu3.10
11 TxHeader c X-Pingback: http://www.test-mystreaming.it/xmlrpc.php
11 TxHeader c Vary: Accept-Encoding
11 TxHeader c Content-Encoding: gzip
11 TxHeader c Content-Type: text/html; charset=UTF-8
11 TxHeader c Content-Length: 7682
11 TxHeader c Accept-Ranges: bytes
11 TxHeader c Date: Thu, 13 Mar 2014 12:08:38 GMT
11 TxHeader c X-Varnish: 1420058564
11 TxHeader c Age: 0
11 TxHeader c Via: 1.1 varnish
11 TxHeader c Connection: keep-alive
11 Length c 7682
11 ReqEnd c 1420058564 1394712517.488089323 1394712518.017520905 0.000098944 0.529357433 0.000074148
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1394712518 1.0
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1394712521 1.0