varnishstat是一个查看当前varnish实例的实时运行状态信息。命令以及参数如下:
varnishstat [-1] [-f <glob>] [-h] [-j] [-l] [-n <dir>] [-N <filename>] [-t <seconds | off>] [-V ] [-X]
以下选项可用:
在服务端使用varnishstat命令之后,会出现如下输出,并且每秒刷新一次。
21+20:34:26
Hitrate ratio: 9 9 9
Hitrate avg: 0.6641 0.6641 0.6641
636637687 499.06 337.12 client_conn - Client connections accepted
637516286 511.04 337.58 client_req - Client requests received
384410700 345.35 203.56 cache_hit - Cache hits
397324 1.00 0.21 cache_hitpass - Cache hits for pass
239345712 158.70 126.74 cache_miss - Cache misses
4835741 0.00 2.56 backend_conn - Backend conn. success
248259966 154.71 131.46 backend_reuse - Backend conn. reuses
242608 0.00 0.13 backend_toolate - Backend conn. was closed
248512413 160.70 131.59 backend_recycle - Backend conn. recycles
1530 0.00 0.00 backend_retry - Backend conn. retry
23931 0.00 0.01 fetch_length - Fetch with Length
249781348 162.69 132.27 fetch_chunked - Fetch chunked
15614 0.00 0.01 fetch_close - Fetch wanted close
589 . . n_sess_mem - N struct sess_mem
39 . . n_sess - N struct sess
34325 . . n_object - N struct object
34492 . . n_objectcore - N struct objectcore
84074 . . n_objecthead - N struct objecthead
216 . . n_waitinglist - N struct waitinglist
77 . . n_vbc - N struct vbc
219 . . n_wrk - N worker threads
120362 0.00 0.06 n_wrk_create - N worker threads created
576844 0.00 0.31 n_wrk_queued - N queued work requests
1 . . n_backend - N backends
239311376 . . n_expired - N expired objects
213406425 . . n_lru_moved - N LRU moved objects
194 0.00 0.00 losthdr - HTTP header overflows
632853774 503.05 335.12 n_objwrite - Objects sent with write
636660065 512.04 337.13 s_sess - Total Sessions
637516287 511.04 337.58 s_req - Total Requests
3283172 2.99 1.74 s_pipe - Total pipe
10476261 3.99 5.55 s_pass - Total pass
249820893 162.69 132.29 s_fetch - Total fetch
210331163670 169330.83 111376.73 s_hdrbytes - Total header bytes
1121952708903 992663.81 594107.97 s_bodybytes - Total body bytes
636390701 511.04 336.99 sess_closed - Session Closed
1746856 0.00 0.93 sess_linger - Session Linger
5168683 2.00 2.74 sess_herd - Session herd
38768640297 30143.36 20529.17 shm_records - SHM records
3367627420 2570.17 1783.26 shm_writes - SHM writes
487720 4.99 0.26 shm_flushes - SHM flushes due to overflow
10953952 30.94 5.80 shm_cont - SHM MTX contention
第一行表示的是varnish的运行时常,上面显示是21天。
Hitrate ratio和Hitrate avg表示的则是在多少秒内的命中率。有几个比较重要的统计数据
cache-hit:缓存命中次数
miss-hit:未命中次数
worker threads:当前工作线程的数量
expired objects:代表过期对象的个数
LRU nuked objects:代表缓存可使用的内存以达上线而不得不移除的对象个数
LRU moved objects:代表LRU策略被移动的对象个数
Total header bytes:代表缓存的请求头对象的大小
Total body bytes:代表缓存的请求体对象大小