我是Varnish的新手。我已成功安装它,现在它正在工作,但我需要一些知识渊博的人提供有关服务器性能的指导。
我读过这篇文章 - http://kristianlyng.wordpress.com/2009/12/08/varnishstat-for-dummies/,但我仍然不确定服务器性能如何。
自上次使用9小时后服务器一直在运行。我知道更多内容会随着时间的推移而缓存,因此缓存命中率会更好,但是现在我关心的是关于服务器性能的中间帮助。
Hitrate ratio: 10 100 613
Hitrate avg: 0.2703 0.3429 0.4513
239479 8.00 7.99 client_conn - Client connections accepted
541129 13.00 18.06 client_req - Client requests received
157594 1.00 5.26 cache_hit - Cache hits
3 0.00 0.00 cache_hitpass - Cache hits for pass
313499 9.00 10.46 cache_miss - Cache misses
67377 4.00 2.25 backend_conn - Backend conn. success
316739 7.00 10.57 backend_reuse - Backend conn. reuses
910 0.00 0.03 backend_toolate - Backend conn. was closed
317652 8.00 10.60 backend_recycle - Backend conn. recycles
584 0.00 0.02 backend_retry - Backend conn. retry
3 0.00 0.00 fetch_head - Fetch head
314040 9.00 10.48 fetch_length - Fetch with Length
4139 0.00 0.14 fetch_chunked - Fetch chunked
5 0.00 0.00 fetch_close - Fetch wanted close
386 . . n_sess_mem - N struct sess_mem
55 . . n_sess - N struct sess
313452 . . n_object - N struct object
313479 . . n_objectcore - N struct objectcore
38474 . . n_objecthead - N struct objecthead
368 . . n_waitinglist - N struct waitinglist
12 . . n_vbc - N struct vbc
61 . . n_wrk - N worker threads
344 0.00 0.01 n_wrk_create - N worker threads created
2935 0.00 0.10 n_wrk_queued - N queued work requests
1 . . n_backend - N backends
47 . . n_expired - N expired objects
149425 . . n_lru_moved - N LRU moved objects
1 0.00 0.00 losthdr - HTTP header overflows
461727 10.00 15.41 n_objwrite - Objects sent with write
239468 8.00 7.99 s_sess - Total Sessions
541129 13.00 18.06 s_req - Total Requests
64678 3.00 2.16 s_pipe - Total pipe
5346 0.00 0.18 s_pass - Total pass
318187 9.00 10.62 s_fetch - Total fetch
193589421 3895.84 6459.66 s_hdrbytes - Total header bytes
4931971067 14137.41 164569.09 s_bodybytes - Total body bytes
117585 3.00 3.92 sess_closed - Session Closed
2283 0.00 0.08 sess_pipeline - Session Pipeline
892 0.00 0.03 sess_readahead - Session Read Ahead
458468 10.00 15.30 sess_linger - Session Linger
414010 9.00 13.81 sess_herd - Session herd
36912073 880.96 1231.68 shm_records - SHM records
答案 0 :(得分:2)
您使用的是什么VCL?如果答案是“无”,那么你可能没有获得非常好的命中率。在全新安装中,Varnish对它的缓存(以及正确的)非常保守,但你可以通过阅读how to achieve a high hitrate来改善问题。如果它是安全的,您可以选择性地取消设置cookie并使用您的VCL规范化请求,这将减少后端呼叫。
您的网站有多少可缓存?你的对象缓存是否足够大?如果你能回答这两个问题,你应该能够用Varnish达到很高的效果。