redis实战(11)：Redis性能监控指标汇总

谁践踏了优雅 2022-11-11 05:57 305阅读 0赞

### 1 监控指标 ###

*  性能指标：Performance
 *  内存指标: Memory
 *  基本活动指标：Basic activity
 *  持久性指标: Persistence
 *  错误指标：Error

--------------------

#### 1.1 性能指标：Performance ####

<table> 
 <thead> 
  <tr> 
   <th>Name</th> 
   <th>Description</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>latency</td> 
   <td>Redis响应一个请求的时间</td> 
  </tr> 
  <tr> 
   <td>instantaneous_ops_per_sec</td> 
   <td>平均每秒处理请求总数</td> 
  </tr> 
  <tr> 
   <td>hi rate(calculated)</td> 
   <td>缓存命中率（计算出来的</td> 
  </tr> 
 </tbody> 
</table>

--------------------

#### 1.2 内存指标: Memory ####

<table> 
 <thead> 
  <tr> 
   <th>Name</th> 
   <th>Description</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>used_memory</td> 
   <td>已使用内存</td> 
  </tr> 
  <tr> 
   <td>mem_fragmentation_ratio</td> 
   <td>内存碎片率</td> 
  </tr> 
  <tr> 
   <td>evicted_keys</td> 
   <td>由于最大内存限制被移除的key的数量</td> 
  </tr> 
  <tr> 
   <td>blocked_clients</td> 
   <td>由于BLPOP,BRPOP,or BRPOPLPUSH而备阻塞的客户端</td> 
  </tr> 
 </tbody> 
</table>

--------------------

#### 1.3 基本活动指标：Basic activity ####

<table> 
 <thead> 
  <tr> 
   <th>Name</th> 
   <th>Description</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>connected_clients</td> 
   <td>客户端连接数</td> 
  </tr> 
  <tr> 
   <td>conected_laves</td> 
   <td>slave数量</td> 
  </tr> 
  <tr> 
   <td>master_last_io_seconds_ago</td> 
   <td>最近一次主从交互之后的秒数</td> 
  </tr> 
  <tr> 
   <td>keyspace</td> 
   <td>数据库中的key值总数</td> 
  </tr> 
 </tbody> 
</table>

--------------------

#### 1.4 持久性指标: Persistence ####

<table> 
 <thead> 
  <tr> 
   <th>Name</th> 
   <th>Description</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>rdb_last_save_time</td> 
   <td>最后一次持久化保存磁盘的时间戳</td> 
  </tr> 
  <tr> 
   <td>rdb_changes_sice_last_save</td> 
   <td>自最后一次持久化以来数据库的更改数</td> 
  </tr> 
 </tbody> 
</table>

--------------------

#### 1.5 错误指标：Error ####

<table> 
 <thead> 
  <tr> 
   <th>Name</th> 
   <th>Description</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>rejected_connections</td> 
   <td>由于达到maxclient限制而被拒绝的连接数</td> 
  </tr> 
  <tr> 
   <td>keyspace_misses</td> 
   <td>key值查找失败(没有命中)次数</td> 
  </tr> 
  <tr> 
   <td>master_link_down_since_seconds</td> 
   <td>主从断开的持续时间（以秒为单位)</td> 
  </tr> 
 </tbody> 
</table>

--------------------

### 2 监控方式 ###

1.  redis-benchmark
2.  redis-stat
3.  redis-faina
4.  redislive
5.  redis-cli
6.  monitor
7.  showlog
8.  get：获取慢查询日志
9.  len：获取慢查询日志条目数
10. reset：重置慢查询日志