Crazy value for sms_nbytes in varnish 2.1

David Birdsong david.birdsong at gmail.com
Thu Apr 22 22:30:58 CEST 2010


This happens to me a lot also.  I'm not on the same version, but I've
seen it happen on many version of trunk.

On Thu, Apr 22, 2010 at 1:27 PM, Augusto Becciu <augusto at jadedpixel.com> wrote:
> Hey guys,
>
> We're running varnish 2.1 in two 64bit linux servers with 17Gb of ram.
> Here's the config we use:
>
> varnishd -P /var/run/varnishd.pid -a 0.0.0.0:2000 -T 127.0.0.1:6082 -w
> 200,2000 -s malloc,12G -p lru_interval=20 -f /etc/varnish/varnish.vcl
>
> Suddenly the value of sms_nbytes in one of those went from 0 to
> 18446744073709550272. What does that mean?
> Other than that everything seems to be normal.
>
> Here's the output of varnishstat -1:
>
> client_conn            198874         7.77 Client connections accepted
> client_drop                 0         0.00 Connection dropped, no sess/wrk
> client_req            1924202        75.17 Client requests received
> cache_hit             1292505        50.49 Cache hits
> cache_hitpass               0         0.00 Cache hits for pass
> cache_miss             607985        23.75 Cache misses
> backend_conn           605971        23.67 Backend conn. success
> backend_unhealthy            0         0.00 Backend conn. not attempted
> backend_busy                0         0.00 Backend conn. too many
> backend_fail              281         0.01 Backend conn. failures
> backend_reuse            1867         0.07 Backend conn. reuses
> backend_toolate             0         0.00 Backend conn. was closed
> backend_recycle          1867         0.07 Backend conn. recycles
> backend_unused              0         0.00 Backend conn. unused
> fetch_head                  0         0.00 Fetch head
> fetch_length           579004        22.62 Fetch with Length
> fetch_chunked               0         0.00 Fetch chunked
> fetch_eof                   0         0.00 Fetch EOF
> fetch_bad                   0         0.00 Fetch had bad headers
> fetch_close             28803         1.13 Fetch wanted close
> fetch_oldhttp               0         0.00 Fetch pre HTTP/1.1 closed
> fetch_zero                  0         0.00 Fetch zero len
> fetch_failed                3         0.00 Fetch failed
> n_sess_mem                148          .   N struct sess_mem
> n_sess                     25          .   N struct sess
> n_object               577014          .   N struct object
> n_vampireobject             0          .   N unresurrected objects
> n_objectcore           577074          .   N struct objectcore
> n_objecthead           577659          .   N struct objecthead
> n_smf                       0          .   N struct smf
> n_smf_frag                  0          .   N small free smf
> n_smf_large                 0          .   N large free smf
> n_vbe_conn                  4          .   N struct vbe_conn
> n_wrk                     400          .   N worker threads
> n_wrk_create              400         0.02 N worker threads created
> n_wrk_failed                0         0.00 N worker threads not created
> n_wrk_max                   0         0.00 N worker threads limited
> n_wrk_queue                 0         0.00 N queued work requests
> n_wrk_overflow             15         0.00 N overflowed work requests
> n_wrk_drop                  0         0.00 N dropped work requests
> n_backend                   2          .   N backends
> n_expired               28911          .   N expired objects
> n_lru_nuked                 0          .   N LRU nuked objects
> n_lru_saved                 0          .   N LRU saved objects
> n_lru_moved           1139364          .   N LRU moved objects
> n_deathrow                  0          .   N objects on deathrow
> losthdr                     0         0.00 HTTP header overflows
> n_objsendfile               0         0.00 Objects sent with sendfile
> n_objwrite            1760199        68.76 Objects sent with write
> n_objoverflow               0         0.00 Objects overflowing workspace
> s_sess                 198871         7.77 Total Sessions
> s_req                 1924202        75.17 Total Requests
> s_pipe                      2         0.00 Total pipe
> s_pass                     12         0.00 Total pass
> s_fetch                607804        23.74 Total fetch
> s_hdrbytes          864214404     33759.69 Total header bytes
> s_bodybytes       32272815948   1260706.12 Total body bytes
> sess_closed            148553         5.80 Session Closed
> sess_pipeline               2         0.00 Session Pipeline
> sess_readahead              0         0.00 Session Read Ahead
> sess_linger           1826330        71.34 Session Linger
> sess_herd              421778        16.48 Session herd
> shm_records         111041082      4337.71 SHM records
> shm_writes            3637366       142.09 SHM writes
> shm_flushes                 0         0.00 SHM flushes due to overflow
> shm_cont                 3147         0.12 SHM MTX contention
> shm_cycles                 47         0.00 SHM cycles through buffer
> sm_nreq                     0         0.00 allocator requests
> sm_nobj                     0          .   outstanding allocations
> sm_balloc                   0          .   bytes allocated
> sm_bfree                    0          .   bytes free
> sma_nreq              1213629        47.41 SMA allocator requests
> sma_nobj              1153922          .   SMA outstanding allocations
> sma_nbytes        11134381624          .   SMA outstanding bytes
> sma_balloc        15050369209          .   SMA bytes allocated
> sma_bfree          3915987585          .   SMA bytes free
> sms_nreq                23891         0.93 SMS allocator requests
> sms_nobj                    0          .   SMS outstanding allocations
> sms_nbytes       18446744073709550272          .   SMS outstanding bytes
> sms_balloc           10708772          .   SMS bytes allocated
> sms_bfree            10710116          .   SMS bytes freed
> backend_req            607863        23.75 Backend requests made
> n_vcl                       1         0.00 N vcl total
> n_vcl_avail                 1         0.00 N vcl available
> n_vcl_discard               0         0.00 N vcl discarded
> n_purge                 23699          .   N total active purges
> n_purge_add             23699         0.93 N new purges added
> n_purge_retire              0         0.00 N old purges deleted
> n_purge_obj_test      1209477        47.25 N objects tested
> n_purge_re_test     708554915     27679.01 N regexps tested against
> n_purge_dups            16004         0.63 N duplicate purges removed
> hcb_nolock            1295385        50.60 HCB Lookups without lock
> hcb_lock                    1         0.00 HCB Lookups with lock
> hcb_insert             605109        23.64 HCB Inserts
> esi_parse                   0         0.00 Objects ESI parsed (unlock)
> esi_errors                  0         0.00 ESI parse errors (unlock)
> accept_fail                 0         0.00 Accept failures
> client_drop_late            0         0.00 Connection dropped late
> uptime                  25599         1.00 Client uptime
>
> Thanks in advance.
>
> Augusto
>
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