ATS metric query

ATS metric query

参考：ATS metric query

 proxy.node.cache_hit_mem_ratio
 proxy.node.cache_hit_mem_ratio_avg_10s     #查询当前内存命中率

 proxy.node.cache_hit_ratio
 proxy.node.cache_hit_ratio_avg_10s         #查询当前缓存(cache.db)命中率

 proxy.node.bandwidth_hit_ratio
 proxy.node.bandwidth_hit_ratio_avg_10s     #查询当前带宽命中率

 proxy.node.current_cache_connections       #前端用户到cache.db链接数

 proxy.node.cache.percent_free              #Cache Percent Free(cache.db空闲空间百分比)

 proxy.node.current_client_connections      #前端用户到ATS的连接数

 proxy.node.current_server_connections      #到后端源站的连接数

 proxy.node.user_agent_xacts_per_second     #平均每秒处理的客户端并发数

 proxy.node.client_throughput_out           #当前ATS输出到前端的带宽流量(单位Mbps)

 proxy.node.current_cache_connections 等价于 proxy.node.http.cache_current_connections_count

 proxy.node.current_client_connections 等价于 proxy.node.http.user_agent_current_connections_count

 proxy.node.current_server_connections 等价于 proxy.node.http.origin_server_current_connections_count

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关于带宽命中率参考: Bandwidth and Transfer

• proxy.node.bandwidth_hit_ratio
  • The difference of proxy.node.user_agent_total_bytes and proxy.node.origin_server_total_bytes, divided by proxy.node.user_agent_total_bytes.
  • Represents the ratio of bytes served to user agents which were satisfied by cache hits, since statistics collection began.
• proxy.node.bandwidth_hit_ratio_avg_10s
  • The difference of proxy.node.user_agent_total_bytes_avg_10s and proxy.node.origin_server_total_bytes_avg_10s, divided by proxy.node.user_agent_total_bytes_avg_10s.
  • Represents the ratio of bytes served to user agents which were satisfied by cache hits, over the previous 10 seconds.

带宽命中率可由下面计算得来：

 [root@~]# /opt/soft/ats/bin/traffic_ctl metric match total_bytes_avg_10s
 proxy.node.user_agent_total_bytes_avg_10s 2161301760.000000
 proxy.node.origin_server_total_bytes_avg_10s 176160640.000000
 proxy.cluster.user_agent_total_bytes_avg_10s 1325454080.000000
 proxy.cluster.origin_server_total_bytes_avg_10s 1294467072.000000
 [root@~]#
 [root@~]# /opt/soft/ats/bin/traffic_ctl metric get proxy.node.bandwidth_hit_ratio_avg_10s
 proxy.node.bandwidth_hit_ratio_avg_10s 0.918493
 [root@~]#
 [root@~]# awk 'BEGIN{print (2161301760-176160640)/2161301760}'
 0.918493
 [root@~]#

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关于ATS向前端输出的带宽值

• proxy.node.http.throughput

10秒内的响应客户端的输出带宽值，单位是 bytes

 proxy.node.http.throughput
 Collection:    global
 Type:    gauge
 Units:    bytes
 Datatype:    integer
 The throughput of responses to user agents over the previous 10 seconds, in bytes.

• proxy.node.client_throughput_out

10秒内的响应客户端的输出带宽值，单位是 megabits

 proxy.node.client_throughput_out
 Collection:    global
 Type:    gauge
 Units:    mbits
 Datatype:    float
 The value of proxy.node.http.throughput represented in megabits.

Code：

 integer 'proxy.node.http.throughput' [[
   local self = ...

   return rate_of_10s(self,
     function() return proxy.node.http.user_agent_total_response_bytes end
   )
 ]]

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