varnishstat命令及参数意义

一、命令参数简介

varnishstat [-1] [-f field_list] [-l] [-n varnish_name] [-V] [-w delay]

Varnishstat 工具显示一个运行 varnishd 实例的相关统计数据。

-1 只显示一次就退出。

-f 使用逗号分隔字段列表来显示，使用"^"开始排除列表。

-l 监听有效的列使用-f 参数。

-n 指定 varnishd 实例来读取日志，如果没有指定，则默认使用主机名。

-V 显示版本号，然后退出。

-w delay 刷新间隔时间，默认 1s。 中心显示中每列的含义，从左到右：

1、 值

2、 从最后一秒更新以来的每秒的一个平均值，或者一个不能计算的周期

3、 从进程开始到现在每秒的平均值，或者是一个不能计算的周期。

4、 描述

当使用-1 选项，输出列的含义,从左到右：

1、 特征名字

2、 值

3、 从进程开始到现在每秒的平均值，或者是一个不能计算的周期。

4、 描述

 

二、使用方法：

1、直接varnishstat：实时动态查看varnish运行情况，默认为如果不指定，则显示默认主机名；

Hitrate ratio:       10       84       84
Hitrate avg:     0.9895   0.8810   0.8810

        7531         0.00         0.13 Client connections accepted
        7933         0.00         0.13 Client requests received
        6870         0.00         0.12 Cache hits
         577         0.00         0.01 Cache misses
         163         0.00         0.00 Backend conn. success
           2         0.00         0.00 Backend conn. failures
         898         0.00         0.02 Backend conn. reuses
         152         0.00         0.00 Backend conn. was closed
        1052         0.00         0.02 Backend conn. recycles
         720         0.00         0.01 Fetch with Length
         253         0.00         0.00 Fetch chunked
          88         0.00         0.00 Fetch zero len

Hitrate ratio由三个数字组成，第一个数字范围0-10，第二个数字范围0-100，第三个数字范围0-1000。

表示过去多少次请求内的Hitrate avg。如果打开的时间足够长，以上三个数字就会逐渐变成10，100，1000。

Hitrate avg里的内容是命中率，需要乘以100转换成百分比，例如上图表示命中率为99.23%

Hitrate ratio:       10       84       84
Hitrate avg:     0.9895   0.8810   0.8810

        7531         0.00         0.13 Client connections accepted
        7933         0.00         0.13 Client requests received
        6870         0.00         0.12 Cache hits
         577         0.00         0.01 Cache misses
         163         0.00         0.00 Backend conn. success
           2         0.00         0.00 Backend conn. failures
         898         0.00         0.02 Backend conn. reuses
         152         0.00         0.00 Backend conn. was closed
        1052         0.00         0.02 Backend conn. recycles
         720         0.00         0.01 Fetch with Length
         253         0.00         0.00 Fetch chunked
          88         0.00         0.00 Fetch zero len

 

2、varnishstat -1 -n 127.0.0.1 查看默认主机名127.0.0.1 的所有有性能数据，显示一次即推出；varnish的工作空间位于：/usr/local/varnish/下，应该可以启动多个varnish进程；

client_conn              7169         0.12 Client connections accepted  【每秒处理连接数】
client_drop                 0         0.00 Connection dropped, no sess/wrk
client_req               7571         0.13 Client requests received
【经验表明connection:request=1:10左右时比较理想，代表到目前为止，浏览器向反向代理服务器
发送的HTTP请求累积次数】
cache_hit                6542         0.11 Cache hits
【代表在这些请求中，反向代理服务器在缓存区中查找并且命中缓存的次数】
cache_hitpass               0         0.00 Cache hits for pass
cache_miss                543         0.01 Cache misses
【代表在这些请求中，反向代理服务器在缓存区中查找但是没有命中缓存的次数】
backend_conn              160         0.00 Backend conn. success
backend_unhealthy            0         0.00 Backend conn. not attempted
backend_busy                0         0.00 Backend conn. too many
backend_fail                2         0.00 Backend conn. failures 【这个数应该尽可能小】
backend_reuse             867         0.02 Backend conn. reuses
backend_toolate           149         0.00 Backend conn. was closed
backend_recycle          1018         0.02 Backend conn. recycles
backend_unused              0         0.00 Backend conn. unused
fetch_head                  0         0.00 Fetch head
fetch_length              686         0.01 Fetch with Length
fetch_chunked             253         0.00 Fetch chunked
fetch_eof                   0         0.00 Fetch EOF
fetch_bad                   0         0.00 Fetch had bad headers
fetch_close                 0         0.00 Fetch wanted close
fetch_oldhttp               0         0.00 Fetch pre HTTP/1.1 closed
fetch_zero                 88         0.00 Fetch zero len
fetch_failed                0         0.00 Fetch failed
n_sess_mem                 22          .   N struct sess_mem
n_sess                      0          .   N struct sess
n_object                   89          .   N struct object 【当前被cache的条目】
n_vampireobject             0          .   N unresurrected objects
n_objectcore               99          .   N struct objectcore
n_objecthead              117          .   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                  2          .   N struct vbe_conn
n_wrk                      10          .   N worker threads 【当前工作线程数】
n_wrk_create               10         0.00 N worker threads created 【创建了多少线程】
n_wrk_failed                0         0.00 N worker threads not created 【尝试创建线程但失败】
n_wrk_max                   0         0.00 N worker threads limited
n_wrk_queue                 0         0.00 N queued work requests
n_wrk_overflow              1         0.00 N overflowed work requests
【等待队列请求，越小越好】
n_wrk_drop                  0         0.00 N dropped work requests 【塞满后扔掉】
n_backend                   2          .   N backends
n_expired                 419          .   N expired objects
【由于cache时间超时而被扔掉的cache条目，具体要看你的ttl设多大了】
n_lru_nuked                 0          .   N LRU nuked objects
【cache空间满而不得不扔掉的cache条目，如果这个数字是0，就没必要增加cache的大小了】
n_lru_saved                 0          .   N LRU saved objects
n_lru_moved              6063          .   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               4906         0.09 Objects sent with write
n_objoverflow               0         0.00 Objects overflowing workspace
s_sess                   7169         0.12 Total Sessions
s_req                    7571         0.13 Total Requests
s_pipe                      0         0.00 Total pipe
s_pass                    486         0.01 Total pass
s_fetch                  1027         0.02 Total fetch
s_hdrbytes            1893314        32.81 Total header bytes
【代表缓存区中所有缓存内容的HTTP头信息长度】
s_bodybytes          77546563      1343.84 Total body bytes
【代表缓存区中所有缓存内容的正文长度】
sess_closed              6775         0.12 Session Closed
sess_pipeline               0         0.00 Session Pipeline
sess_readahead              0         0.00 Session Read Ahead
sess_linger               805         0.01 Session Linger
sess_herd                 810         0.01 Session herd
shm_records            385518         6.68 SHM records
shm_writes              70686         1.22 SHM writes
shm_flushes                 0         0.00 SHM flushes due to overflow
shm_cont                  193         0.00 SHM MTX contention
shm_cycles                  0         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                 1445         0.03 SMA allocator requests
sma_nobj                  178          .   SMA outstanding allocations
sma_nbytes            2945405          .   SMA outstanding bytes
sma_balloc           45227687          .   SMA bytes allocated
sma_bfree            42282282          .   SMA bytes free
sms_nreq                    2         0.00 SMS allocator requests
sms_nobj                    0          .   SMS outstanding allocations
sms_nbytes                  0          .   SMS outstanding bytes
sms_balloc                860          .   SMS bytes allocated
sms_bfree                 860          .   SMS bytes freed
backend_req              1027         0.02 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                     1          .   N total active purges
n_purge_add                 1         0.00 N new purges added
n_purge_retire              0         0.00 N old purges deleted
n_purge_obj_test            0         0.00 N objects tested
n_purge_re_test             0         0.00 N regexps tested against
n_purge_dups                0         0.00 N duplicate purges removed
hcb_nolock               7078         0.12 HCB Lookups without lock
hcb_lock                  534         0.01 HCB Lookups with lock
hcb_insert                534         0.01 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                  57705         1.00 Client uptime
backend_retry               0         0.00 Backend conn. retry
dir_dns_lookups             0         0.00 DNS director lookups
dir_dns_failed              0         0.00 DNS director failed lookups
dir_dns_hit                 0         0.00 DNS director cached lookups hit
dir_dns_cache_full            0         0.00 DNS director full dnscache

参考：http://blog.haohtml.com/archives/12064