hitrate at 1.00 but backend still getting traffic

[Rob Ayres]

Hi,

Doing some testing and have got the hitrate average to 1.00. Cache misses
are reported as 0.00 but we are still seeing reqests in the backends apache
logs. The Total Pass line (see the varnishstat output below) seems to show
about the right number of requests to account for this. But if there is
still traffic going to the backend I dont understand why the hitrate is 1.00

The vcl file is very simple,

backend default {
  .host = "barbican-z3";
  .port = "80";
}
sub vcl_fetch {
     if (obj.cacheable) {
        set obj.ttl = 24h;
    }
}


Also, is there a document detailing what each line of varnishstat means?

Thanks,

Rob


Hitrate ratio:       10      100     1000
Hitrate avg:     1.0000   1.0000   0.9898

        3404         0.00         0.69 Client connections accepted
      474002       290.17        95.51 Client requests received
      346436       271.16        69.80 Cache hits
       55518         0.00        11.19 Cache misses
      126781        19.01        25.55 Backend connections success
         757         0.00         0.15 Backend connections failures
      126778        20.01        25.54 Backend connections recycles
           1          .            .   N struct srcaddr
           1          .            .   N active struct srcaddr
          27          .            .   N struct sess_mem
          14          .            .   N struct sess
       54903          .            .   N struct object
       54906          .            .   N struct objecthead
      114219          .            .   N struct smf
        4215          .            .   N small free smf
           1          .            .   N large free smf
           3          .            .   N struct vbe_conn
          10          .            .   N struct bereq
          14          .            .   N worker threads
          14         0.00         0.00 N worker threads created
           0         0.00         0.00 N queued work requests
         563         0.00         0.11 N overflowed work requests
           1          .            .   N backends
      194279          .            .   N LRU moved objects
      481532       303.18        97.02 Objects sent with write
        3404         0.00         0.69 Total Sessions
      474019       291.18        95.51 Total Requests
       72023        20.01        14.51 Total pass
      126778        20.01        25.54 Total fetch
   101827536     63514.30     20517.34 Total header bytes
  5814577615   5316785.81   1171585.25 Total body bytes
        1246         0.00         0.25 Session Closed
      473212       292.18        95.35 Session herd
    17724459      9138.51      3571.32 SHM records
     1092786       605.37       220.19 SHM writes
        4361         1.00         0.88 SHM MTX contention
           5         0.00         0.00 SHM cycles through buffer
      256109        40.02        51.60 allocator requests
      110004          .            .   outstanding allocations
   803733504          .            .   bytes allocated
  7786201088          .            .   bytes free
         764         0.00         0.15 SMS allocator requests
      355236          .            .   SMS bytes allocated
      355236          .            .   SMS bytes freed
      126786        19.01        25.55 Backend requests made
           1         0.00         0.00 N vcl total
           1         0.00         0.00 N vcl available
           1          .            .   N total active purges
           1         0.00         0.00 N new purges added
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